T2 TOWERS

Construction and Owner’s Manual

Effective Date Publication Number

2015-07-01 4000037 Rev 06
(English Version)
 The Symbol shown below is used to call your attention to instructions
concerning your personal safety. Watch for this symbol - it points
out important safety precautions. It means “ATTENTION” - Become
Alert! Your Personal Safety Is Involved! Read the message that
follows and be alert to the possibility of personal injury or death.

Be Alert!
Your Personal Safety Is Involved
A copy of this manual should be available at all times to the owner/operator. Additional
copies may be requested from the company at the address shown on the back cover.
Please reference manual part number 4000037 when requesting additional copies.

Please Contact BROWNIE SYSTEMS or Your Dealer

If You Have Any Questions Concerning This Manual

Keep This Manual In A Safe Place Available For Future Reference.

The safety and performance of this Tower, constructed and readied for
operation will be affected by the installation and construction personnel.
Towers generally involve extreme heights and high winds. Careful
consideration must be given to the structural requirements. We therefore
highly recommend the use of a skilled construction company. Brownie
Systems cannot be responsible for the construction of the Tower. The
information obtained in this manual is offered only as a convenience to the
installer. No liability is expressed or implied toward the installation.

2015-07-01 GLOBAL INDUSTRIES, INC. 2 T2 Towers 4000037

 A GENUINE

GLOBAL INDUSTRIES, INC.

PRODUCT

PREFACE
You have purchased the finest free standing Support Tower manufactured today. The following information is
intended as a guide for: Tower pre-assembly, proper construction of this Tower, and safe and proper use of this
Tower after construction.

General Safety Statement

Your safety and the safety of others associated with grain system equipment is of prime
concern to us at Brownie Systems. This manual was written with the safety of the operator
and others who come into contact with the equipment as our prime concern. We wrote this
manual to help you to better understand how to safely build and use this Tower, Tower
Stairway, Tower Ladder, Tower Platform, and/or Tower assembly.
It is your responsibility as the owner, builder, operator, or supervisor, to know what specific
requirements, precautions, and hazards exist and to make these known to all personnel
working with the equipment or in the area, so that they too may take any necessary safety
precautions that may be required!
Failure to read this Manual and its Safety Instructions by all operators and all personnel is a
misuse of the equipment. We want you as our partner in safety!
All personnel, including construction personnel, must read and understand this manual and
all equipment operator’s manuals before starting Tower construction!

NOTE: Although Global Industries, Inc. language translations of this manual are made
as accurately as possible, if there is a conflict or difference between the English and the
other translations of this manual, the English text will prevail.

2015-07-01 GLOBAL INDUSTRIES, INC. 3 T2 Towers 4000037

 Contents
Be Alert!.........................................................................................2
Warranty........................................................................................6

<1> Safety.......................................................................8
General Safety Requirements.......................................8

Operating Safety...........................................................14

<2> Bolt Torque............................................................15

<3> Top Plates..............................................................16
<4> Foundation Considerations.................................17
Minimum Foundation Connection............................................18
Foundation Plan.........................................................................19

<5> Required Pre-Assembly.......................................22

Tower Staging Layout Example................................................22
Component Stage and Identification........................................23
Post Dimensions, All Sections..................................................29

<6> Assembly...............................................................30
Assemble Each Tower Section..................................................30
Base Section Foundation Connection......................................31
Factory Internal Lateral Cross Braces.....................................32
Grain Leg Tower Internal Lateral Cross Braces......................34
Stack Tower Stages Onto the Base Stage................................36
Basic Sections............................................................................37
Access Sections.........................................................................42
Stage 4 - 6 Tower Sections........................................................54
6 - Post Tower Sections.............................................................57

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 Contents

<7> Tower Stairway......................................................60

Tower Stairway Specifications..................................................60

<8> Tower Ladder.........................................................73

Tower Ladder Landing...............................................................81
Ladder Step - Thru......................................................................87
Ladder Stacking Drawings........................................................88
Tower Stacking Examples.........................................................97

<9> Internal Tower Platform........................................99

Overview.....................................................................................99
Parts...........................................................................................100
Assembly..................................................................................102

Appendix...................................................................... 118
Parts List................................................................................... 118
Index..........................................................................................121

2015-07-01 GLOBAL INDUSTRIES, INC. 5 T2 Towers 4000037

Warranty
Global Industries Inc. (the Company) makes the following warranty to the initial
retail purchaser of its products (the Customer).

MATERIALS and WORKMANSHIP:

The Company warrants products manufactured by it to be free from defects in

materials and workmanship in normal use and service for a period of one (1) year
after date of delivery to the Customer.

COMPANY’S OBLIGATION and

CUSTOMER’S EXCLUSIVE REMEDY:

The Company’s sole obligation and the Customer’s exclusive remedy under this
warranty is as follows:

If within one (1) year after delivery to the customer the product fails to function properly
due to a defect in either materials or workmanship, the Company will at its option, either
repair the defective part or replace the defective part with a new or reconditioned part.
Labor charges for removing defective parts and installing replacement parts, shipping
charges with respect to such parts, and applicable sales and other taxes, if any, shall
not be covered by this warranty.

CONDITIONS, LIMITATIONS, AND EXCLUSIONS:

There are no warranties or merchantability or fitness for a particular purpose

with respect to any product manufactured or sold by the Company. Motors provided
by the Company are in most instances warranted by the manufacturer thereof and
are not warranted by the Company. The Company shall not be responsible under
this warranty or otherwise for personal injury or for Incidental or Consequential
Damages, including, without limitation, loss of use and lost profits. This warranty
does not apply to defects or damages caused by misuse, improper maintenance,
or improper installation of the Company’s product or any equipment attached to or
used in connection with the Company’s product. The Company reserves the right
to make changes or improvements to its products without incurring any obligation
with respect to previously manufactured products. Field modification of this product
without the expressed written permission of the Company constitutes a misuse of
the product. The Company shall have no liability under this warranty until payment
in full for the product in question has been made by the customer. The foregoing
is the sole warranty made by the Company. No one is authorized to make other
warranties on behalf of the Company.

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Notes:

2015-05-19 GLOBAL INDUSTRIES, INC. 7 T2 Towers 4000037

 <1> Safety
General Safety Requirements

WARNING! WARNING!
ALL INFORMATION ON THIS PAGE IS
WARNING INFORMATION! Watch For This Symbol: !

It Points Out Important Safety Precautions.

This Brownie Systems Construction/Safety It Means “ATTENTION” - Become Alert!
manual is written to assist and instruct: Your Safety Is Involved.
1 Those who are responsible for the
complete installation of the Tower,
Tower Stairway, Tower Ladder, Tower WORK AREA SAFETY STATEMENT
Platform, Internal Platform, and Tower Under no circumstances should persons
Accessories; and not involved in the operation be allowed to
2 All users or others who are on or near trespass into or be present in the work area.
this equipment during or after installation It is the duty of all operators to make certain
is complete. children and/or other persons stay out of the
Global Industries Inc. assumes no liability with work area! Trespass into the work area by
respect to proper construction and inspection, anyone not involved in the actual operations,
assembly, or use of its products established or trespass into a hazard area by anyone, shall
under applicable laws, all of which is the sole result in an immediate shut down by the operator.
responsibility of the purchaser and those doing It is the responsibility of all operators to make
the assembly work. certain the work area has secure footing and is
Appurtenances and the accessories clean and free of all debris and tools which might
manufactured by us for use with our products cause accidental tripping and/or falling. It is their
conform only to applicable Federal or Safety responsibility to keep the work area clean and
Standards in effect at such time. orderly during operation. It is also the operator’s
responsibility to have damaged equipment
repaired and to make certain all equipment is
SAFETY COMPLIANCE made free of sharp edges.
It is your responsibility as an owner or
operator or supervisor, to know what specific PROPER PERSONNEL
requirements, precautions, and work hazards
exist and to make these known to all other To insure safe use of the Tower, Tower
personnel working with the equipment or in Stairway, Tower Ladder, Tower Platform,
the area, so they too may take any necessary Internal Platform, and Tower Accessories,
safety precautions that may be required. make certain only trained persons install,
Always adhere to all safety laws pertaining to maintain, and use these assemblies.
the construction and use of this installation.

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 Safety

AUXILIARY EQUIPMENT SAFETY

WARNING!
You may decide to buy and install “auxiliary
ALL INFORMATION ON THIS PAGE IS equipment” made by other manufacturers.
WARNING INFORMATION! Global Industries, Inc. has no control over the
design and manufacture of this equipment. If
you buy and install auxiliary equipment then at
OSHA a minimum we suggest you do the following:
OCCUPATIONAL SAFETY AND HEALTH 1 Obtain, read, and understand the
ACT OF 1970 instructions and cautions of the auxiliary
equipment manufacturer. Make certain
Certain purchasers of our products may be
all equipment is installed according to
subject to the requirements and standards of
the manufacturer’s instructions.
the William-Steiger Occupational Safety and
Health Act of 1970, which prescribes standards 2 Check with Global Industries, Inc. or
for use of appurtenances of our manufacture, your dealer to make certain the Tower,
such as handrails, platforms, stairways, Tower Stairway, Tower Ladder, Internal
fixed ladders, ladder cages, and guard rails. Platform, and Tower Accessory is
(Occupational Safety and Health Standards designed to support any additional loads
Section 1910.21 through 1910.32). Before supplied by the auxiliary equipment.
installing these devices, familiarize yourself 3 Obtain any applicable safety decals from
with the above Federal Standards. the auxiliary equipment manufacturer
At the time of manufacture, these optional and display each safety decal in its
items conform to applicable standards. correct, visible location.
4 Make certain all electrical equipment is
OSHA, ANSI, NIOSH properly installed and grounded by a
You may obtain further relevant safety qualified electrician.
information for the safe operation, construction, 5 Check availability and operation of
and use of the Tower and grain systems electrical lockout and emergency stop
equipment from OSHA, ANSI, and NIOSH: systems.
www.osha.gov
1-800-321-OSHA 6 Make certain all guards and shields are
www.ansi.org securely in place.
www.cdc.gov/niosh 7 Store all operations/maintenance
1-800-232-4636 (cdc info, NIOSH) manuals in a safe place available for
future use.

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 Safety

WORK AREA AND EQUIPMENT SAFETY

WARNING!
In this and other manuals, shields and guards
ALL INFORMATION ON THIS PAGE IS may have been removed for illustrative
WARNING INFORMATION! purposes. Do not operate the equipment
without shields and guards in place. Failure
to heed this warning may result in serious
OPERATOR QUALIFICATIONS personal injury or death!

Operation of this unit shall be limited to When climbing, on Towers or the equipment,
competent and experienced persons. In order take care not to fall! Common sense dictates
to be qualified, he / she must also know and such equipment should not be used when
meet all other requirements, such as, but not conditions such as rain or wind preclude
limited to, the following: their safe use. Global Industries, Inc. strongly
recommends optional climbing equipment be
1 Some laws and regulations specify purchased to meet the current regulations
that no one under the age of 16 years and specifications set forth by OSHA or ANSI
may operate power machinery. It is whether the individual operator is required
your responsibility to know what these by law to do so or not. When performing
requirements are in your own area or operations work or maintenance on Global
situation. Industries, Inc. products and at all times,
2 Current OSHA regulations state in part: use the correct OSHA approved Personal
“At the time of initial assignment and at Protective Equipment, Life Saving Equipment,
least annually thereafter, the employer and Fall Protection Equipment, and always
shall instruct every employee in the safe follow all OSHA Regulations.
operation and servicing of all equipment Do not attempt construction when the weather
with which the employee is, or will be makes it unsafe! Especially, stop construction
involved.”* when wind conditions are not favorable!
3 Unqualified persons are to STAY OUT of Care must be taken to avoid entanglement
the work area. in equipment installed in or on the Tower and
4 A person who has not read and grain systems equipment. Securely lockout all
understood all operating and safety power, be it electrical or PTO, before working
instructions is not qualified to operate on or near such equipment.
the machine. Field modification of the Tower, grain systems
* Federal Occupational Safety and Health Standards for equipment, or auxiliary equipment without the
Agriculture, Subpart D. Section 9128.57 (a) (6). authorization of the manufacturer may present
unknown dangers to the operator and must
SAFETY QUESTIONS OR CONCERNS be avoided.
Please contact Global Industries, Inc. with any
specific Tower and grain systems equipment
use safety needs!
In the USA -
Phone: 1-800-228-4285
Fax: 1-308-382-6954

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 Safety

WARNING! WARNING!
Owners and Contractors: Before starting IMPORTANT: Make certain all persons
construction of the Tower and grain within the work area on or installing
systems equipment, Towers, grain systems equipment,
1) READ AND UNDERSTAND THIS ladders, lifts, crane lifts, scaffolds, safety
MANUAL! cages, platforms, or the like are secure
2) Read and understand the instructions and not in danger of falling! Also make
for all equipment, auxiliary equipment certain the work surfaces are clean and
structures, other products, and the like free of clutter.
within or connected to the Tower and
grain systems equipment.
3) View all illustrations in this manual.
4) Read and understand any applicable WARNING!
OSHA Regulations, Building Codes, and
Any alterations to the Tower, Tower
Electric Codes.
Stairways, Tower Ladders, Tower
Platforms, Internal Tower Platforms,
or Tower Accessories without the
authorization of the Brownie Systems
WARNING! Engineering Department is prohibited!
Make certain all persons on the Tower
and grain systems equipment during
construction are properly fastened to
safety cables to prevent injury or death WARNING!
due to falling!
Local codes supersede the instructions
provided in this manual and should
be strictly adhered to. Contact the
manufacturer if you have questions.
WARNING!
Installation of accessories or
equipment in or on the Tower or grain
systems equipment/structures that
it was not designed to support will
overstress the structure and void all
Global Industries Inc. Warranties! If you
do not have specific recommendations
from Global Industries, Inc., where
additional loading is involved, contact
the Brownie Systems Engineering
Department before installing any such
accessories or equipment.

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 Safety

WARNING! WARNING!
Avoid injury or death! Use extreme Brownie Systems Ladders are designed
caution when working from heights. Use to support one person plus materials and
the proper equipment when working from tools, not more than the OSHA working
heights. Take the proper precautions to load at the date of manufacture.
prevent persons or objects from falling!

WARNING!
WARNING!
Read and understand all of the
DO NOT substitute parts or hardware for instructions in this manual before starting
those supplied by Brownie Systems. assembly. Build the Tower and grain
systems equipment in accordance with
the instructions. Failure to build your
Tower and grain systems equipment
WARNING! correctly could result in structural damage
or failure! Structural damage or failure of
It is your responsibility as the owner, any of these assemblies could result in
operator, builder, and/or supervisor to injury or death of persons. Call Brownie
obtain and follow all necessary relevant Systems using the phone number on
OSHA Ladders, Safety Cages, and the back of this manual if you have any
Platforms safety regulations, rules, questions regarding assembly.
guidelines, and information applicable
to Ladders, Safety Cages, and Platforms
installation and use!

WARNING!
Do not let ladders come into contact
with live electrical wires or electrical
equipment!

WARNING!
Inspect ladders before climbing. Never
use a damaged, bent, or broken ladder.
Never climb a ladder that is wet, icy,
greasy, or slippery.

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 Safety

WARNING! WARNING!
Make certain to build your Tower in exact When adding additional equipment not
accordance with your Tower staging previously accounted for, considerable
layout! wind load or weight may be added to
the Tower or grain systems equipment.
Make certain this Brownie Tower is
designed for all equipment, and any
WARNING! future additions. If you are uncertain,
contact the factory before installing this
Do not use any damaged Brownie Tower or grain systems equipment.
Systems / Global Industries, Inc. parts. Do
not use any damaged parts from another
manufacturer. It may not be safe.
WARNING!
Pre-position components before
WARNING! field welding. Verify all installation
requirements are satisfied!
Make certain all components or
assemblies are safe and structurally
secure during construction! Do not
stand on or under components,
assemblies, stairs, platforms, or
WARNING!
equipment that is not yet structurally Some parts in your assemblies may differ
secure! Not heeding this warning could from those pictured in this manual! Some
result in severe injury or death! bolt lengths in your assemblies may differ
from those stated in this manual!

WARNING!
WARNING!
Foundation and anchoring are of
critical importance to Brownie Systems IMPORTANT: If any questions or difficulty
structures such as Towers. Contact should arise during Tower, Tower Stairway,
a consulting engineer to design an Tower Ladder, Tower Platform, Internal
adequate foundation for site soil Tower Platform, or Tower Accessory
conditions to support your structures. installation, the contractor or owner
Brownie Systems will supply the loading should contact Brownie Systems to get an
calculations to your engineer to aid in answer and to resolve the problem!
designing the foundation.

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 Safety

Operating Safety
SECONDARY SAFETY DEVICES
WARNING!
Devices such as interlock switches, may be
ALL INFORMATION ON THIS PAGE IS helpful but are not fail safe and should not be
WARNING INFORMATION! substituted for a proper lockout procedure.
Do not rely on a switch that can fail, can lose
adjustment or can be bypassed. A proper
FOLLOW THESE (4) BASIC SAFETY lockout procedure will prevent accidents.
RULES REMEMBER! There is no substitute for a
Follow the four rules below to make certain commitment to safety!
that accidents do not occur! Make certain that
everyone working with or around your equipment OTHER IMPORTANT OPERATING
follows these rules! SAFETY CONCERNS
1 Make certain all covers, grates, and 1 Do not make contact with or place body
guards are in place and securely fastened parts near moving parts or moving
before operating! equipment! Also remember, do not wear
2 Never step or walk on equipment covers loose clothing near moving parts or
grates or guards! moving equipment!

3 Lockout all power before removing 2 Have a safety program in place for all
covers, grates, or guards! Secure all personnel. Make certain all personnel
chains and belts so they can’t move before working in your work area know where
working on any part of your equipment. all emergency controls and devices are!

4 Don’t modify or redesign your 3 Work area lighting is part of work area
equipment without first obtaining written safety!
approval from the manufacturer. 4 Completely stop unauthorized climbing
Following these 4 basic safety rules is a access to your Tower, Tower Stairway,
proven way to reduce accidents! Be certain Tower Ladder, Tower Platform and/or
to provide all employees working on or near Tower Accessory. Place any necessary
your equipment with effective safety training, warning signs at the Tower base or
including management. around your fences.

It is ok to add extra safety rules for your job 5 Install any necessary warning signs at
site but DO NOT SUBSTITUTE other safety all necessary locations.
procedures for the 4 basic safety rules!
Following the safety rules given for the safe
use of your equipment requires a commitment
at all levels within your company.

2015-07-01 GLOBAL INDUSTRIES, INC. 14 T2 Towers 4000037

 <2> Bolt Torque
Bolt Head Identification

Grade 2 Grade 5 Grade 8 Grade 8.2

Bolt Torque Values

coarse thread bolts T = Tightening Torque P = Bolt Tensile Load in lb

Bolt Grade 2 Grade 5 Grade 8 and 8.2

Diameter T T T
- P P P
Threads/Inch ft-lb Nm kgf-m ft-lb Nm kgf-m ft-lb Nm kgf-m
1/4” - 20 1313 6 8.1 0.83 2000 9 12 1.2 2850 13 18 1.8
5/16” - 18 2176 12 16 1.7 3350 19 26 2.6 4700 27 37 3.7
3/8” - 16 3188 22 30 3.0 4950 34 46 4.7 6950 48 65 6.6
7/16” - 14 4388 35 47 4.8 6800 55 75 7.6 9600 77 104 11
1/2” - 13 6850 63 85 8.7 9050 83 110 11 12800 120 163 17
5/8” - 11 9300 110 150 15 14500 170 230 24 20300 230 312 32
3/4” - 10 11400 160 217 22 21300 290 390 40 30100 410 556 57
7/8” - 9 13800 220 298 30 29500 470 640 65 41600 670 910 93
1” - 8 15000 280 380 39 38700 710 960 98 54600 1000 1400 138

Use the torque values listed in the table above for all Tower, Tower Stairway,
Tower Ladder, and Tower Platform hardware connections!

WARNING! WARNING!
CRITICAL: You must use the correct bolts UNDER NO CIRCUMSTANCES SHALL
as designed and provided by Brownie ANY OTHER BOLT BE SUBSTITUTED
Systems throughout the complete FOR THOSE SUPPLIED BY
assembly of the Tower, Tower Stairway, Brownie Systems / Global Industries Inc.!
Tower Ladder, Tower Platform, Internal
Tower Platform, or Tower Accessory! And,
you must achieve the correct bolt torques Contact the factory with any Tower or Tower
as indicated in the table above throughout component construction or assembly problems.
the complete assembly! Using the wrong Phone: 1-800-228-4285
bolts or not achieving the correct torque Fax: 1-308-382-6954
values could result in the structural
damage or failure of the Tower, Tower
Stairway, Tower Ladder, Tower Platform,
Internal Tower Platform, or Tower
Accessory, or grain systems equipment.

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 <3> Top Plates
WARNING! WARNING!
This page includes special instructions All Galvanized - Hot dipped Towers
for ALL Galvanized-Hot-dipped Towers. require that Tower Top Plates be installed
These instructions must be strictly at the top terminating ends of each tower
adhered to at all Tower Top Terminations post. The installation of these plates will
for these towers. stop water from entering and pooling in
tower posts. If any water was allowed
to pool inside of a tower post, the water
could freeze and cause the tower post
1 install tower top plates to split which could result in structural
Use 5/8” x 1 1/4” bolts, and hex nuts to attach failure of the tower! In addition, a hole
tower top plates to the top ends of each tower must be drilled in the bottom of base
post (example b). Install the top plates to the tower section posts to allow any water to
top tower section before it is raised with the escape that may enter into tower posts!
crane into position. Apply (1) generous bead NOTE: If the base tower section is stage 6,
of sealer caulking just to the inside of the bolt drill water drain holes at the bottom of the
circle. Securely tighten all bolts! next nearest stage 5 or less tower section
above the base tower section.

Field Drill Drain-Out Hole REQUIRED TOP PLATE INSTALLATION

POST Required for Galvanized-Hot-Dipped Towers Only!

Field drill a
at 5/8” water drain 5/8” x 1-1/4”
base hole in each bottom BOLTS AND NUTS
(90000079 & 90005045)
section post [8 places]
1 1/2” above the
POST CONNECTION TOWER TOP PLATE POST
PLATE! (G3984290 - Stage 0-3) CONNECTION
PLATE

BEAD OF SEALER
CAULKING
(tube-90600000)

1 1/2” 4 POST
[38 mm] TOWER TOP
PLATE
PACKAGE
(4508015)

GALVANIZED -
HOT DIPPED
TOWER POST top
terminating end

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 <4> Foundation Considerations
FOUNDATION NOTES i IMPORTANT NOTE: Develop a layout plan of the
The foundation and anchoring are critical on tower, tower accessories, and auxiliary equipment
all Tower structures. Variables such as soil and then build the tower foundation in proper
accordance with the layout plan.
conditions, compactness and layering of the
soil, water table, concrete quality, spacing and
quality of rebar and other factors must be taken
into account when designing and costing the i IMPORTANT NOTE: When designing a foundation
foundation. Observe all building codes. for this Brownie Tower, design for additions to the
tower such as stairs before you pour the foundation.
Brownie Systems does not design If tower stairs are to be installed a concrete pad
foundations, nor is Brownie Systems or Global should be poured in the proper corner at the same
Industries, Inc. responsible for foundations or time as the foundation is poured.
the anchoring of a tower to the foundation. An
engineer should be consulted to design the
foundation to meet requirements dictated by
the soil conditions and building codes in your WARNING!
area. Brownie Systems will provide your design
When the Tower base stage is placed on
engineer with additional information relating to
the foundation plates, weldment is critical.
the structural characteristics of the tower. This
Certified welding personnel are required!
information will include:
• The tower dead load
• The compression per post / uplift per post
• The torque at foundation (overturn moment)
• The horizontal shear on the whole tower
Phone: 1-800-228-4285
Fax: 1-308-382-6954
Website: www.go-brownie.com

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 Foundation Considerations

Minimum Foundation Connection

The following are minimum Anchor Rod Strength: Using (4) rods per
recommendations and are primarily a guide plate, A307 minimum.
for bidding purposes only.
All rods should be 6’ [1,829 mm] long with
Fabricating Foundation Plates: Each 9” [229 mm] on (1) end turned into a “J” hook
base stage tower post should rest on over a 3” [76 mm] radius or as designed by
a foundation plate with (4) holes drilled a qualified foundation engineer. Follow the
2” [51 mm] in from the 2 edges of each suggestions on this page, page 20, and page 31 to
plate corner to accommodate anchor rods. tie the rods into the foundation.
Towers with base stage 0, 1, 2, and 3 require
a minimum of a 12” x 12” x 1 1/2” A‑36 Anchor Rod Diameter and Strength
[305 mm x 305 mm x 38 mm] steel foundation
plate. Towers with base stage 4, 5, and 6 Base Section Rod Diameter
require a minimum of an 18” x 18” x 2” A‑36 (heaviest stage) (based on A307)
[457 mm x 457 mm x 51 mm] steel foundation
plate. Holes drilled in these plates should be Stage 0 7/8” [23 mm]
drilled 3” [76 mm] in from the plate corner Stage 1 1 1/8” [29 mm]
edges and these holes should be 1/16” larger
Stage 2 1 3/8” [35 mm]
than the cold rolled anchor rods that will later be
inserted into them. The bottom of the foundation Stage 3 1 1/2” [39 mm]
plate must fully contact the concrete foundation. Stage 4 1 3/4” [45 mm]
Stage 5 2” [51 mm]
WARNING! Stage 6 2 1/2” [64 mm]

Towers with base stage 4, 5, and 6

require at least 18” x 18” x 2” A-36
[457 mm x 457 mm x 51 mm] steel
foundation plate.

WARNING!
Design your foundation in accordance
with local codes and with respect to local
soil conditions. Contact a consulting
engineer for specific guidelines.

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 Foundation Considerations

Foundation Plan

WARNING!
Foundation Considerations (including the
Foundation Plan) in this manual are to
be considered general in nature and are
intended only as a guide. It is the owner’s
responsibility to provide an appropriate
site and foundation design for the
adequate support of this tower. Brownie
Systems assumes no responsibility for
results arising from these suggestions.

BASE DIMENSIONS - T2 TOWERS

A (See Table)
Size A or B
2’ 1’ - 8”
[610 mm] [508 mm]

4’ 3’ - 8”
[1,219 mm] [1,118 mm]

6’ 5’ - 8”
[1 829 mm] [1,727 mm]
B (See Table)
8’ 7’ - 9”
90° [2,438 mm] [2,362 mm]
(Typ.) 10’ 9’ - 8”
[3 048 mm] [2,946 mm]

12’ 11’ - 8”
[3,658 mm] [3,556 mm]

14’ 13’ - 8”
[4 267 mm] [4,166 mm]

16’ 15’ - 8”
BRACING 22.5° BRACING 22.5° [4 877 mm] [4,775 mm]
CENTERLINE CENTERLINE
POST POST
90° CONNECTION 90° CONNECTION
PLATE PLATE

“C” Radius “C” Radius

“E” “E”
“D” Radius Diameter “D” Radius
Diameter

PLATE DIMENSIONS PLATE DIMENSIONS

STAGE 0, 1, 2, AND 3 STAGE 4, 5, AND 6

Stage “C” “D” “E”

0, 1, 2, & 3 3-3/16” [81 mm] 4-1/8” [105 mm] 11/16” [17 mm]
4, 5, & 6 3-3/4” [95 mm] 5-1/8” [133 mm] 1-1/16” [27 mm]

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 Foundation Considerations

Foundation Construction (basic design for cost estimating purposes only)

[6]
[5] [4]
Tower Stage 0 - 3: [6]
Use 1/2” [20 mm] full crown fillet
weld wi h E70xx or E80xx
Tower Stage 4 - 6:
Use 3/4” [13 mm] full crown fillet
weld with E70xx or E80xx
[3]
Fill all bolt holes with the weld.

[2]
details A, B, E

Detail E

detail D [1] foundation (example)

[2] anchor rod
[3] foundation plate (example)
[4] post connection plate
[5] tower post
detail C
[6] WELD USING E70xx or E80xx
rebar ties
footing to
foundation walls

Foundation, Example Drawing

IMPORTANT NOTE: ALL WELDS MUST BE FULL CROWN!
WELDS MUST NOT BE CONCAVE!

[1] foundation (example)

[2] anchor rod
[3] foundation plate (example) [6]
[4] post connection plate [5]
[5] tower post
[6] WELD USING E70xx or E80xx
[4] THIS VIEW
ENLARGED
TYP [6] FOR CLARITY
1/2” STAGE 0 - 3,
3/4” STAGE 4 - 6
Detail B
[3]

[1]
rebar
[2]

tie rebar together

at intersection
Detail A Detail C Detail D

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 Foundation Considerations

Foundation, Overhead View

Detail F NOTE: The edge of the stairway resting

pad should always be positioned away from
where the starter stair section. It will connect
to the first landing. Starter sections are the
same size regardless of whether they are
for 8’ x 8’, 10’ x 10’, 12’ x 12’, 14’ x 14’ and
16’ x 16’ towers (mm = [(2,438x2,438), (3,048x3,048),
(3,658x3,658), (4,267x4,267), (4,877x4,877)] ).

TOWER POST
BASE PLATE

stairway
resting pad
(3” [77 mm] 36 3/4” [933 mm]
thick) 30” [762 mm]

24” [610 mm] 81 3/4” [2,076 mm]

WARNING! WARNING!
Foundation weldment is critical. Make The 4, 5, and 6 tower plates are made
certain your welding personnel are of T-1 material. Therefore A LOW
certified. Do not grind off welds to make HYDROGEN WELDING ROD MUST BE
them smooth. USED. This rod can be either E70 xx
or E80 xx with the bead size as stated
above. The first pass of weld should
have short weld beads alternated from
side to side to eliminate warping.

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 <5> Required Pre-Assembly
Tower Staging Layout Example

WARNING!
top section This is an example ONLY! YOU
Tower Height = 106 ft
MUST BUILD THIS TOWER IN EXACT
ACCORDANCE WITH THE CORRECT
Post Stage = 0
Diagonal Stage = 0 TOWER STAGING LAYOUT FOR THIS
Tower Height = 100 ft TOWER! The Tower Stacking Layout is
attached to the manual cover! If you did
Post Stage = 0
Diagonal Stage = 0 not receive it, you must contact Brownie
Tower Height = 90 ft Sales before staring construction!
Post Stage = 0
Diagonal Stage = 0

lighter
tower
Tower Height = 80 ft This Tower is
stages
Post Stage = 1 strength staged!
Diagonal Stage = 0 Tower Height indicates the
tower height at the top of each common height
Tower Height = 70 ft
tower section. conversions
Post Stage = 1 feet mm
Diagonal Stage = 4
Post Stage indicates the section 10’ [3,048]
Tower Height = 60 ft
post stage.
20’ [6,096]
Post Stage = 2
Diagonal Stage = 4
30’ [9,144]
40’ [12,192]
Tower Height = 50 ft Diagonal Stage indicates the section
diagonal and horizontal stage. 50’ [15,240]
Post Stage = 2
Diagonal Stage = 4 60’ [18,288]
70’ [21,366]
heavier Tower Height = 40 ft
tower 80’ [24,384]
stages
Post Stage = 3A The number of weld dots at a
Diagonal Stage = 4 post end = the post stage. 90’ [27,432]
100’ [30,480]
Tower Height = 30 ft

Post Stage = 4 Diagonal or horizontal stage is typically

Diagonal Stage = 4 noted on identification labels at brace ends.
Tower Height = 20 ft
A 10’ rise above the previous section height indicates a 10’ section
Post Stage = 4
Diagonal Stage = 4
with 10’ section diagonals. Note that the top section for this
example tower is a 6’ section with 6’ posts and diagonals.
Tower Height = 10 ft
Tower Base Section.
Post Stage = 5
Diagonal Stage = 4

Mid horizontals are always required with stage 4, 5, and 6 posts.

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 Required Pre-Assembly

Component Stage and Identification

All Brownie tower components (posts, diagonals, designation determines where that component
and braces) are strength staged with up to must be positioned within the Tower Layout.
(8) different stages. As a result, each tower See the Tower Staging Layout drawing now. It is
component has a stage designation. You must attached to the manual cover. Posts, diagonals,
build this tower with the heaviest (or highest and braces are staged separately from each
number) stage components at the tower base other. Before you start construction, sort the
and the lightest (or lowest number) stage tower components according to component type
components at the tower top. The rest of the and component stage in the order they will be
components are assembled in stage numerical used during construction.
order in between. A component’s stage

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 Required Pre-Assembly

Posts Identification
The tower post (lightest) stage 0 has no weld
dots; stage 1 has (1) weld dot; stage 2 has (2)
weld dots; etc. (see the following examples). The
strongest or heaviest tower posts are the posts
with the greatest number of weld dots.

T2 Tower Post Identification - Stage 0, 1, 2, and 3

stage 0 stage 1 stage 2 stage 3

no 1 2 3
weld weld weld weld
dots dot dots dots

3000000 3000010 3000020 3000030

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 Required Pre-Assembly

T2 Tower Post Identification - Stage 0, 1, 2, and 3

stage 3 adapter

3
weld
dots

stage 4 stage 5 stage 6

4 4 5 6
weld weld weld weld
dots dots dots dots

3000070 3000040 3000050 3000060

WARNING!
At all times follow the tower staging
instructions in your Tower Staging Layout
and this manual!

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 Required Pre-Assembly

Braces Identification
NOTE: Stage 3 diagonals have reinforcing plates.
T2 Tower braces or bracing refers to any
See the example below. 14’ [4,267 mm] and 16’ [4,877
T2 Tower structural members which are not mm] stage 3 diagonals will not have a reinforcement
tower posts. plate welded on to the brace ends.

STAGE 0 - 6 DIAGONALS / HORIZONTALS

CENTER-TO-CENTER DISTANCE

Stage 0 - 1

2” [51 mm]

Stage 2

2 3/8” [60 mm]

Stage 3

2 3/8” [60 mm]

Stage 4

2 7/8” [73 mm]

Stage 5 - 6

2 7/8” [73 mm]

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 Required Pre-Assembly

T2 Tower Horizontal Identification

CENTER-TO-CENTER
31 1/8” 55 1/8” 80 1/8” 103 1/8” 127 1/8” 151 1/8” 175 1/8”
DISTANCE
[791 mm] [1,400 mm] [2.035 mm] [2,619 mm] [3,229 mm] [3,839 mm] [4,448 mm]
in [mm]

TOWER SECTION
4’ 6’ 8’ 10’ 12’ 14’ 16’
WIDTH
[1,219 mm] [1,829 mm] [2,438 mm] [3,048 mm] [3,658 mm] [4,267 mm] [4,877 mm]
ft [mm]
2 3/8” [60 mm]
2 7/8” [73 mm]
2 7/8” [73 mm]

2 3/8” [60 mm]

2 7/8” [73 mm]
2 7/8” [73 mm]

2 3/8” [60 mm]

2 7/8” [73 mm]
2 7/8” [73 mm]

2 3/8” [60 mm]

2 7/8” [73 mm]
2 7/8” [73 mm]

2 3/8” [60 mm]

2 7/8” [73 mm]
2 7/8” [73 mm]
2 7/8” [73 mm]
2 7/8” [73 mm]
2 7/8” [73 mm]
2 7/8” [73 mm]
2 7/8” [73 mm]
2 7/8” [73 mm]
2 7/8” [73 mm]
2 7/8” [73 mm]
2” [51 mm]

2” [51 mm]

2” [51 mm]

2” [51 mm]

2” [51 mm]
HORIZONTAL
TUBE WIDTH
in [mm]

2 5 2 5 2 5 2 5 2 5 2 5 2 5
* HORIZONTAL
STAGE
01 or 4
6
01 or 4
6
01 or 4
6
01 or 4
6
01 or 4
6
01 or 4
6
01 or 4
6
3 3 3 3 3 3 3

* See the previous page for differences between braces stage 2 & 3.

T2 Tower Diagonal Identification

Tube TOWER SECTION HEIGHT

Diagonal Width TOWER
Stages in WIDTH 10’ 9’ 8’ 7’ 6’ 5’ 4’
[mm] [3,058 mm] [2,743 mm] [2,438 mm] [2,134 mm] [1,829 mm] [1,524 mm] [1,219 mm]

2” 4’ 111 25/32” 100 31/64” 89 23/64” 78 31/32” 68” 58 7/64” 49 5/32”

0
[51 mm] [1,219 mm] [2,839 mm] [2,552 mm] [2,270 mm] [2,006 mm] [1,727 mm] [1,476 mm] [1,249 mm]

2” 6’ 121 9/16” 111 1/4” 101 5/16” 91 7/8” 83 3/32” 75 7/32” 68 17/32”
1
[51 mm] [1,829 mm] [3,088 mm] [2,826 mm] [2,573 mm] [2,334 mm] [2,111 mm] [1,911 mm] [1,741 mm]

2
2 3/8” 8’ 135 9/16” 126 13/32” 117 3/4” 109 23/32” 102 1/2” 96 7/32” 91 3/32”
[60 mm] [2,438 mm] [3,443 mm] [3,211 mm] [2,991 mm] [2,787 mm] [2,604 mm] [2,444 mm] [2,314 mm]

2 3/8” 10’ 150 31/32” 142 13/16” 135 7/32” 128 9/32” 122 5/32” 116 15/16” 112 3/4”
3
[60 mm] [3,048 mm] [3,835 mm] [3,627 mm] [3,435 mm] [3,258 mm] [3,103 mm] [2,970 mm] [2,864 mm]

2 7/8” 12’ 168 29/32” 161 21/32” 154 31/32” 148 31/32” 143 23/32” 139 5/16” 135 13/16”
4
[73 mm] [3,658 mm] [4,290 mm] [4,106 mm] [3,936 mm] [3,784 mm] [3,650 mm] [3,539 mm] [3,450 mm]

2 7/8” 14’ 188 3/16”

5
[73 mm] [4,267 mm] [4,780 mm]

2 7/8” 16’ 208 15/32”

6
[73 mm] [4,877 mm] [5,295 mm]

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 Required Pre-Assembly

Some Typical Example Braces

Part No:
3989608 Loc: Y15
Desc: TWR DIAG 10X10 STG01 10FT SECT

STAGE 0 - 3 HORIZONTAL Tower Braces are identified

by a label at the brace end.
The label indicates the brace
part number, brace type and
STAGE 4 HORIZONTAL brace stage. See the above
example. As with tower posts,
the strongest or heaviest
braces are the braces with
STAGE 5 - 6 HORIZONTAL the highest stage number.

NOTE: The Loc number is not used

STAGE 4 - 6 MID HORIZONTAL during construction; it is a number used
at the factory only.

STAGE 0 - 1 DIAGONAL

STAGE 2 - 3 DIAGONAL

STAGE 4 DIAGONAL

STAGE 5 - 6 DIAGONAL

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 Required Pre-Assembly

Post Dimensions, All Sections

Post Dimensions for All Standard Posts and Post Connection Plates

4” [102 mm]
4 7/16” [113 mm]
Post Height (post)
2 1/4” [57 mm] “H” Hole to Hole “B”

120” = (10’) = [3,048 mm] 106” = 8’ 10” = [2,692 mm]

108” = (9’) = [2,743 mm] 94” = 7’ 10” = [2,388 mm]
96” = (8’) = [2,438 mm] 82” = 6’ 10” = [2,083 mm]
84” = (7’) = [2,134 mm] 70” = 5’ 10” = [1,778 mm]
72” = (6’) = [1,829 mm] 58” = 4’ 10” = [1,473 mm]
60” = (5’) = [1,524 mm] 46” = 3’ 10” = [1,168 mm]
TOWER
POST 48” = (4’) = [1,219 mm] 34” = 2’ 10” = [864 mm]

Hole to Hole “B” Post Height “H”

8 holes in plate
material: 1/2” [13 mm] plate
BRACING CENTERLINE
7” [178 mm]
22.5°
2 3/4” [70 mm] 45°
90°

4 1/8” [105 mm]

radius

8 1/4” [210 mm]

diameter
11/16” [17 mm] diameter

POST CONNECTION PLATE

(STAGE 0, 1, 2, & 3)

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 <6> Assembly
Assemble Each Tower Section

1 assemble each tower section each tower section on a relatively level area
near the tower foundation. Assemble tower
Assemble sections on the ground according sections in the order they will be used. Start
to the instructions in the following examples! with the tower sections that have the heaviest
Install braces to posts according to the stage components first. Assemble these tower
instructions in the example below. Assemble sections first.

Diagonal and Horizontal Assembly

Install the (2) brace ends to only (1) ear side. NEVER install both diagonals in (1) section
plane to the same ear side! See the example below. Note the brace positions (section A - A).
Each brace end has a flat side (a contact side). Position all brace end flat sides so that they
make contact with the tower ears.

Section A - A inner
ear side HORIZONTAL

outer
ear side
POST

The HORIZONTAL is installed to the

outside of the post ear at both ends.
A A

AL
N
O
G
IA
D
POST EAR

The DIANGONAL is installed to the same side of the post ear at both ends.

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 Assembly

Base Section Foundation Connection

1 center tower on the foundation 2 tighten all braces connections

Assuming that you have assembled all of the Tighten all the braces connections at the tower
tower sections at the same time, you are now ears and diagonal intersections. Torque values
ready to place the base section of the tower are listed on page 15 of this manual.
onto the foundation plates. Remember, the
heaviest staged section will be the tower base.
Center the tower base stage on the foundation
plates. If necessary, shim between the post 3 weld tower to the foundation
plates and the foundation plates to plum and Weld the tower post connection plates to the
level the tower. foundation plates. Use a 1/2” [13 mm] thick
throat, fillet weld. Stage 0 - 3 tower base plates
are 1/2” [13 mm] thick. The weld is required
WARNING! all the way around the post connection
plates. Crown the fillet to achieve at least a
Foundation weldment is critical. Make
1/2” [13 mm] thick weld. Fill all bolt holes in
certain that the welding personnel are
the connection plates with weld to stop water
certified. Do not grind off welds to make
seepage. Use E70 xx or E80 xx welding wire or
them smooth.
welding rod for all welds. (See page 54 for
stage 4 - 6).

WARNING!
Before building this Brownie Tower, make
certain it is properly staged for the load
it was designed to support. Also make
certain that you have ordered the correct
braces to assure structural integrity. If you
have any problems during construction or
if you have decided to add additional wind
loading to the tower after the unit was
ordered, contact the factory immediately!

Brownie Systems:
Phone: 1-800-228-4285
Fax: 1-308-382-6954

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 Assembly

Factory Internal Lateral Cross Braces

Internal cross braces must be installed in 20’ installed inside. Or, follow the instructions in this
increments before assembling the next sections manual for making internal cross braces. See the
of the tower (every 10’ for towers supporting a following pages.
scale). This will square up the tower and allow for
For internal cross braces installation see
easier assembly of the additional stages. Factory
example a on the next page and the instructions
standard internal cross braces can be supplied
for correct installation given below.
for towers without grain legs or other equipment

INTERNAL CROSS BRACES INSTALLATION

1 internal cross brace plates 3 connect braces together

Install the internal cross brace plates at the top Connect braces together at the intersection
of the post connection plates at the section post point, with the appropriate grade 2 hex bolt,
connections where cross braces are required. lock washer, and nut.
2 3/8” [60 mm] O.D. Tube = 7/16” x 5 1/2”

2 cross braces 2 7/8” [73 mm] O.D. Tube = 5/8” x 7”

Install the first cross brace. Bolt the cross brace

to the underside of the internal cross brace 4tighten all bolts
plates with grade 5 bolts, lock washers, and Tighten all bolt connections at the internal
nuts. (See page 54 for stage 4 - 6 tower sections cross brace plates and brace intersections.
bolt requirements.) Install the next cross brace. Torque values are listed on page 15.
Bolt the cross brace to the underside of the
internal cross brace plates with grade 5 bolts,
lock washers, and nuts. WARNING!
The installer should order lateral cross
WARNING! braces with all towers that do not
have equipment installed inside the
You must install internal lateral cross tower. Never build a tower that does
braces to the inside of the tower at least not have internal lateral cross braces
every 20 feet for lateral stabilization. You at least every 20’ [6,096 mm] of rise!
must install internal lateral cross braces Cross braces are especially important
as the tower is constructed. This braces for towers used to support a scale or
requirement must also be met when other equipment! Brownie has standard
elevator legs and other equipment are internal “X” braces available for each
supported by the tower, connected to the tower size. For towers with grain legs,
tower, or installed within the tower system.. stabilization braces must be fabricated
by the installer (see the next page).

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 Assembly

a) Internal Cross Braces Installation

INTERNAL LATERAL INTERNAL LATERAL

A CROSS BRACE CROSS BRACE PLATE
intersection point (use hex
bolt, nut and lock washer)
B
INTERNAL LATERAL
CROSS BRACE PLATE

C D
INTERNAL LATERAL
CROSS BRACE

POST
INTERNAL LATERAL CROSS BRACE
intersection point (use hex
bolt, nut and lock washer)
INTERNAL LATERAL
CROSS BRACE
A D

C B POST

INTERNAL LATERAL
CROSS BRACE PLATE

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 Assembly

Grain Leg Tower Internal Lateral Cross Braces

Brownie Systems recommends that you When installing elevator leg(s) not centered
assemble the elevator leg at the same time in the tower, the installer must laterally tie the
that you assemble the tower. We suggest the elevator legs together with a collar and brace
following assembly process. Assemble (2) or (4) at least every 20’ [6,096 mm] using at least
sections of elevator leg. Then, use a crane and (6) (horizontal) lateral cross braces as shown in
lower these sections into the anchored tower examples b and c on the next page.
sections after all the bolts have been tightened to
the correct torque.
Brace the Grain Legs: The (4) corners of the WARNING!
grain leg must be tied to the corresponding If you have any construction problems
corner posts of the tower at least every or if additional wind/weight loading
20’ [6,096 mm] of rise to stabilize and square the will be added to the tower, contact the
tower as well as the leg. factory immediately!
Fabricate the braces: A minimum of
2” x 2” x 1/4” [51 mm x 51 mm x 7 mm] angle iron
or 3” [76 mm] channel is recommended.
Install the braces: <Option 1> The installer
may drill and bolt these braces to the tower
post connection plates using grade 8 bolts.
See page 54 for bolt sizes for stage
4 - 6 tower sections. <Option 2> The braces
may be welded to the tower posts near the post
connection plates. Weld these braces to an angle
iron or channel iron reinforcing collar around the
leg(s) which ties both trunks together.
Towers that have a grain leg centered in
the tower: can be laterally cross braced in
a manner similar to that shown in example a
on the next page. Use at least a 2” x 2” x 1/4”
[51 mm x 51 mm x 7 mm] angle iron or
3” [76 mm] channel iron and rigidly brace the
legs into each of the (4) tower posts. You must
stabilize the grain leg so it does not rotate
or swivel.
On Installations with (2) or more elevator legs
in the tower: the installer must tie the elevator
legs together with a collar and rigidly brace that
collar to the tower post connection plates at
20’ [6,096 mm] intervals as shown in example b
on the next page.

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 Assembly

a) Grain Leg Tower Internal Cross Braces, Top View

(1) Centered Elevator Leg

2” x 2” x 1/4”
a COLLAR or LEG [51 mm x 51 mm x 7 mm]
SPACER ANGLE angle or
ELEVATOR LEG 3” [76 mm] channel
centered in TOWER iron recommended
every 20’ [6,096 mm]

bolt angle or channel

iron to POST
CONNECTION
POST CONNECTION PLATE PLATE with grade 5
bolt or weld near
POST CONNECTION
PLATES.

(2) Off - Center Elevator Legs POST

CONNECTION
COLLAR or LEG PLATE
b
SPACER ANGLE

grain 2” x 2” x 1/4”
leg B [51 mm x 51 mm x 7 mm]
grain
angle or 3” [76 mm]
when legs are installed leg A channel
off‑center at least (6) LATERAL iron recommended
CROSS BRACES should be every 20’ [6,096 mm]
used to stabilize the LEGS.

POST
CONNECTION
(1) Off - Center Elevator Leg PLATE

c COLLAR or LEG
2” x 2” x 1/4”
SPACER ANGLE
[51 mm x 51 mm x 7 mm]
angle or 3” [76 mm]
grain channel
leg iron recommended
every 20’ [6,096 mm]

when legs are installed bolt angle or channel

off‑center at least (6) LATERAL iron to POST
CROSS BRACES should be grain CONNECTION PLATE
used to stabilize the LEGS. leg stage 0 - 3 =
PN3981340
stage 4 - 6 =
PN4991099

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 Assembly

Stack Tower Stages Onto the Base Stage

After you have welded the base tower section iron is recommended to connect the leg to
to the foundation plates, you may start stacking the tower. Drill and bolt the iron stabilizers to
the tower. Use a crane. Stack (1) or (2) the internal cross brace plates (or tower post
assembled tower sections onto the anchored connection plates) using the grade 5 bolts
base section. Remember that the heavier or provided or another grade 5 bolt of appropriate
higher numbered tower parts are placed near length. If correctly bolting onto these plates
the tower base. The lower numbered sections is not possible, you may weld the stabilizers
are placed higher up. Bolt each staged to the corner posts, but they must be within
section together at the corner post connection 7” [178 mm] of the post connection plates.
plates using 5/8” x 2 1/2” grade 8 bolts Weld the other end of these stabilizer braces
(stage 0 - 3 posts), lock washers, and nuts. to an angle iron collar around the leg or legs.
Torque all horizontal, diagonal, and corner post If (2) legs are placed in the tower, tie them
bolts to the correct torques. together with a collar and brace the outside
corners to the corresponding corner tower
post. If a grain leg is not built in conjunction
WARNING! with the tower, internal cross braces must
be added to the inside of the tower at least
INTERNAL LATERAL CROSS BRACES: every 20’ [6,096 mm] for lateral stabilization.
All Brownie support towers must be If the tower is to support a scale, it must be
internally braced. Towers that have no cross‑braced every 10’ [3,048 mm].
equipment installed inside of them should
come equipped with internal lateral cross If a tower stairway is to be installed on the
braces purchased from the factory. If you tower, it should be installed when the tower
do not receive these braces, please call is being stacked. See the Tower Stairway
the factory immediately. Never build a instructions in this manual.
tower that is not internally braced. Internal Continue to construct the tower and elevator
lateral cross braces instructions are on legs (if applicable) (1) or (2) sections at a time,
pages 32 - 35 of this manual. until the tower legs are complete. If you are
installing a galvanized tower, you must install
tower top plates to each post connection plate
When you install a grain leg, assemble the positioned at the top of the uppermost tower
elevator leg along with the tower, (1) or (2) posts. These are found with the post top plates
sections at a time. Use a crane. Lower the hardware kit and attach using post connection
leg sections into the anchored-and-bolted bolts, lock washers, and nuts. This step is
tower sections after all bolts in the tower required to stop serious damage caused by
sections have been correctly torqued. The freezing water.
(4) corners of the grain leg(s) MUST be tied
to the corresponding corner tower posts
at least every 20’ [6,096 mm] of rise. See
Grain Leg Tower Internal Cross Braces on
page 34. This stabilizes and squares both
the elevator leg and the tower. A minumum
2” [51 mm] angle iron or 3” [76 mm] channel

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 Assembly

Basic Sections

Stage 0 - 3 Posts and Stage 0 - 4 Braces

Basic Section Hardware
<1> 1” x 4 grade 8 hex bolt, lock washer, and nut

Horizontals <2> 7/8” x 2 1/2” grade 8 hex bolt, lock washer, and nut
Stage 0 - 1 » 2” [51 mm] O.D. Tube
Stage 2 - 3 » 2 3/8” [60 mm] O.D. Tube
<3A> 5/8” x 2 1/2” grade 8 hex bolt, lock washer, and nut
Stage 4 » 2 7/8” [73 mm] O.D. Tube <3B> 7/16” x 6” grade 2 hex bolt, lock washer, and nut
14’ - 16’ Tower Section <4> 5/8” x 7” grade 2 hex bolt, lock washer, and nut
Stage 0 - 1 » 2 7/8” [73 mm] O.D. Tube
Stage 2 - 4 » 2 7/8” [73 mm] O.D. Tube <3A>
HORIZONTAL
Diagonals
Stage 0 - 1 » 2” [51 mm] O.D. Tube <2>
Stage 2 - 3 » 2 3/8” [60 mm] O.D. Tube
(Note: Stage 3 has
reinforcement plates.)
Stage 4 » 2 7/8” [73 mm] O.D. Tube

14’ - 16’ Tower Section

Stage 0 - 1 » 2 3/8” [60 mm] O.D. Tube
Stage 2 - 4 » 2 7/8” [73 mm] O.D. Tube

POST

see
DIAGONAL detail
<3A>
<2>

<3A> Stage 0 - 3 Stage 4

use use
<3B> <4>

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 Assembly

Stage 3 Adapter Posts, Stage 0 - 4 Braces

Basic Section Hardware
<1> 1” x 4 grade 8 hex bolt, lock washer, and nut

Horizontals <2> 7/8” x 2 1/2” grade 8 hex bolt, lock washer, and nut
Stage 0 - 1 » 2” [51 mm] O.D. Tube
Stage 2 - 3 » 2 3/8” [60 mm] O.D. Tube
<3A> 5/8” x 2 1/2” grade 8 hex bolt, lock washer, and nut
Stage 4 » 2 7/8” [73 mm] O.D. Tube <3B> 7/16” x 6” grade 2 hex bolt, lock washer, and nut
14’ - 16’ Tower Section <4> 5/8” x 7” grade 2 hex bolt, lock washer, and nut
Stage 0 - 1 » 2 7/8” [73 mm] O.D. Tube
Stage 2 - 4 » 2 7/8” [73 mm] O.D. Tube
<3A>
HORIZONTAL
Diagonals
Stage 0 - 1 » 2” [51 mm] O.D. Tube
Stage 2 - 3 » 2 3/8” [60 mm] O.D. Tube <2>
(Note: Stage 3 has
reinforcement plates.)
Stage 4 » 2 7/8” [73 mm] O.D. Tube

14’ - 16’ Tower Section

Stage 0 - 1 » 2 3/8” [60 mm] O.D. Tube
Stage 2 - 4 » 2 7/8” [73 mm] O.D. Tube

POST

see
DIAGONAL
detail

<2>

<1>

Stage 0 - 3 Stage 4
use use
<3B> <4>

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 Assembly

Stage 4 - 6 Posts, Stage 0 - 4 Braces

Basic Section Hardware
<1> 1” x 4 grade 8 hex bolt, lock washer, and nut

Horizontals <2> 7/8” x 2 1/2” grade 8 hex bolt, lock washer, and nut
Stage 0 - 1 » 2” [51 mm] O.D. Tube
Stage 2 - 3 » 2 3/8” [60 mm] O.D. Tube <3A> 5/8” x 2 1/2” grade 8 hex bolt, lock washer, and nut
Stage 4 » 2 7/8” [73 mm] O.D. Tube <3B> 7/16” x 6” grade 2 hex bolt, lock washer, and nut
14’ - 16’ Tower Section <4> 5/8” x 7” grade 2 hex bolt, lock washer, and nut
Stage 0 - 1 » 2 7/8” [73 mm] O.D. Tube
Stage 2 - 4 » 2 7/8” [73 mm] O.D. Tube
<1>
HORIZONTAL
Diagonals
Stage 0 - 1 » 2” [51 mm] O.D. Tube
Stage 2 - 3 » 2 3/8” [60 mm] O.D. Tube
<2>
(Note: Stage 3 has
reinforcement plates.)
Stage 4 » 2 7/8” [73 mm] O.D. Tube

14’ - 16’ Tower Section

Stage 0 - 1 » 2 3/8” [60 mm] O.D. Tube <2>
Stage 2 - 4 » 2 7/8” [73 mm] O.D. Tube

MID HORIZONTAL

POST see
DIAGONAL detail

<2>

<1>

Stage 0 - 3 Stage 4
use use
<3B> <4>

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 Assembly

Stage 5 - 6 Posts, Stage 5 - 6 Braces

Basic Section Hardware
<1> 1” x 4 grade 8 hex bolt, lock washer, and nut

Horizontals <2> 7/8” x 2 1/2” grade 8 hex bolt, lock washer, and nut
Stage 5 - 6 » 2 7/8” [73 mm] O.D. Tube
<3A> 5/8” x 2 1/2” grade 8 hex bolt, lock washer, and nut
14’ - 16’ Tower Section <4> 5/8” x 7” grade 2 hex bolt, lock washer, and nut
Stage 5 - 6 » 2 7/8” [73 mm] O.D. Tube

Diagonals
Stage 5 - 6 » 2 7/8” [73 mm] O.D. Tube <1>
HORIZONTAL
14’ - 16’ Tower Section
Stage 5 - 6 » 2 7/8” [73 mm] O.D. Tube
<2>

<2>

MID HORIZONTAL

POST see
DIAGONAL detail
<2>
(STAGE 5 - 6
DIAGONALS use
2 BOLTS here.)
<1>

<4>

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 Assembly

20’ Section, Stage 0 - 3

1 Basic Section

Hardware
<2> 7/8” x 2 1/2” grade 8 hex bolt,
lock washer, and nut

<3A> 5/8” x 2 1/2” grade 8 hex bolt,

lock washer, and nut
2
<3B> 7/16” x 6” grade 2 hex bolt,
lock washer, and nut

20’ TOWER
POST

<3A>

1 2 3
<3B>

<2>
<2B>

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 Assembly

Access Sections

Access Sections Required Information

WARNING! WARNING!
ALWAYS WELD ALL “Z”, DOUBLE “Z”, ALWAYS WELD ALL “Z” HORIZONTAL
AND DOUBLE-ACCESS BRACES ACCESS BRACES USED WITH
AT ALL CONTACT POINTS! Use a “Z” ACCESS, DOUBLE “Z” ACCESS,
3/8” fillet weld on all contact points. AND DOUBLE-ACCESS BRACING
See the next page now. CONFIGURATIONS. Use a 3/8” fillet weld at
all contact points. See the next page now.

“Z”, Double “Z”, and Double‑Access Section Identification

“Z” ACCESS DOUBLE “Z” ACCESS DOUBLE-ACCESS

(stage 0 - 3 shown) (stage 0 - 3 shown) (stage 0 - 3 shown)

See also other examples in this manual section, which show ACCESS SECTIONS
for stage 4 and greater.

WARNING!
Only install access sections where they
are designed and staged to be located!
Never install an access section where it
was not designed to be located!

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 Assembly

Stage 0 - 3 Access Sections

Access braces are installed in a tower equipment. Access braces are also used at the
whenever a conveyor is installed through the tower base for access to clean out doors on
tower, or when the diagonals may interfere the elevator legs, for conveyor access, or for
with the proper placement of spouting or other control room access.

ASSEMBLE ACCESS BRACES, as shown on the following pages.

Instructions

1 Bolt both ends of the horizontal access nuts as follows. Use 7/8” x 2 1/2” grade 8 bolts,
brace (the horizontal with the brace ear plate nuts, and lock washers on stage 0 - 1. Make
in the center) to the tower posts. Use the certain to bolt the diagonal access braces to
correct size bolts, nuts, and lock washers (See the correct sides of the post ear.
the next page for Stage 0 - 3 sizes).
4 Torque all bolts to the correct bolt
2 Bolt (1) end of both diagonals to the brace torques!
ear at the center of the horizontal access brace.
Use a 7/8” x 3 1/2” grade 8 bolt, nut, and lock 5 Check bolt grade. Typically access
washer. Be certain to bolt the diagonal access braces do not need welding. Make certain you
braces to opposing sides of the brace ear. aren’t using lighter grade bolts that are for
use elsewhere on the tower. Welding is still
3 Bolt the other end of both diagonals and required for “Z”, Double “Z”, and Double‑Access
the bottom standard horizontal to the post ears Braces, as well as the stage 5 and 6 access
on the tower posts with bolts, lock washers, and braces for 8’ x 8’ [2,438 mm x 2,438 mm] towers.

WARNING!
Brownie towers that have already been
constructed can also be retrofitted with
access braces. When ordering access
braces, please specify what stages you
are going to install the access braces in.
If you are installing access braces in an
existing tower, you must do so on a calm
day and take proper precautions to keep
the wind forces from shifting the tower.
Exchange braces (1) side at a time only!

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 Assembly

Single Access Sections, Stage 0 - 3

Access Section A sizes 8’ - 12’ (4 places)

A B

SINGLE ACCESS
HORIZONTAL
(HORIZONTAL
ACCESS BRACE)

B sizes 8’ - 12’ (4 places)

SINGLE ACCESS
DIAGONAL
(DIAGONAL
ACCESS BRACE)
STANDARD
C HORIZONTAL

A sizes 14’ - 16’ (4 places) B sizes 14’ - 16’ (4 places)

sizes 8’ - 12’

C
Bolts for Detail A:
Use 7/8” x 2 1/2” grade 8 hex bolt, lock washer, and nut.
Bolts for Detail B:
stage 0 and 1 - 7/8” x 3 1/2” grade 8 hex bolt, lock washer, and nut.
stage 2 and 3 - 7/8” x 3 1/2” grade 8 hex bolt, lock washer, and nut.
Bolts for Detail C:
stage 0 and 1 - 7/8” x 2 1/2” grade 8 hex bolt, lock washer, and nut
stage 2 and 3 - 7/8” x 2 1/2” grade 8 hex bolt, lock washer, and nut sizes 14’ - 16’

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 Assembly

“Z” Access Sections

“Z” access braces are used when the position
of the exiting equipment is near (1) corner of 1 install “Z” access braces
the tower. Brownie Systems can supply you Assemble the braces as shown in example
with (2) different styles of “Z” access braces. a1 on the next page. For double “Z” access
braces (example a3 on page 50), position
Single “Z” access section with right side access
the mid horizontal opposite the stiffening rib.
is shown in example a1 on the next page.
These same braces can be flipped for left side
access or flipped for top and bottom access.
Single “Z” access (section) braces consist of
the following:
2 - “Z” horizontal access braces (heavy pipe with
plates on each end)
1 - “Z” diagonal access braces (heavy pipe with
plates on each end and a welded stiffening rib
on one side)
1 - short diagonal
Double “Z” access sections with right side access
are shown in example a3 on page 50. These
same braces can be flipped for left side access.
Double‑access (section) braces consist of the
following:
2 - “Z” horizontal access braces (same as Single
“Z” horizontal access braces)
2 - “Z” diagonal access braces (same as Single
“Z” diagonal access braces)
2 - mid horizontals (same as stage 4
mid horizontals, page 55, example a.)

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 Assembly

Single “Z” Access Sections, Stage 0 - 3

2 tighten all bolt connections a1) Single “Z” Access Brace, Stage 0 - 3

Tighten all bolts to the correct torques.

Access Section

3 weld contact points of all braces “Z” HORIZONTAL ACCESS BRACE

(2 required)
Weld the contact edges of all braces as
indicated in the correct examples specific to
your installation. See the next pages. There SHORT
must be (2) welds on both ends of each DIAGONAL
(1 required)
brace. All welds must be 3/8” [10 mm] fillet
b1)
welds - 1 3/4” [45 mm] long each. Welds are
critical, as this configuration produces large
forces in the braces. Leave the bolts in place.
BRACE
RIB STIFFENER

4 base section access braces on inside of tower

Base stage access braces only: The bottom b2)

“Z” horizontal access brace on the base
“Z” DIAGONAL
section of the tower may now be removed ACCESS BRACE
after construction if the complete foundation is (1 required)
adequately tied together and well reinforced with
reinforcing rods. Replace and torque all bolts to
the correct bolt torques.
b3)
right side entry shown

WARNING!
Already constructed Brownie towers can
be retrofitted with “Z” access braces;
please specify at what height you will
install these braces and the diagonals
stage number at this location. If you are
installing “Z” access braces in an existing
tower, you must do so on a calm day and
take proper precautions to keep the wind
forces from shifting the tower. Exchange
braces (1) side at a time only.

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 Assembly

NOTE: The examples on this page and the previous

page represent stage 0, 1, 2, and 3 tower sections.
Stage 4 - 6 require an additional mid horizontal as
shown on the next pages.

b1) Single “Z” Access Brace - “Z” Corner b2) Single “Z” Access Brace - Mid “Z”
E70XX
SERIES 3/8”
WELDING 3/8”
WIRE

E70XX
SERIES 3/8”
WELDING 3/8”
WIRE
E70XX
SERIES 3/8”
WELDING 3/8”
WIRE
Stage 0 - 3 -
7/8” x 2 1/2” grade 8
hex bolt, lock washer,
and nut

“Z” DIAGONAL
ACCESS BRACE
Stage 0 - 3 -
7/8” x 2 1/2” grade 8 hex bolt,
lock washer, and nut

b3) Single “Z” Access Brace - “Z” End

3/8” = 10 mm

E70XX
SERIES 3/8”
WELDING 3/8”
WIRE

Stage 0 - 3 -
7/8” x 2 1/2” grade 8 hex bolt,
lock washer, and nut

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 Assembly

Single “Z” Access Sections, Stage 4 - 6

Single “Z” Access Braces, Stage 4 - 6

Access Section

7/8” X 2 1/2” GRADE 8 HEX BOLT,

LOCK WASHER and NUT 7/8” X 2 1/2” GRADE 8
HEX BOLT,
LOCK WASHER and NUT

“Z” HORIZONTAL
ACCESS BRACE

b4)

MID 7/8” X 2 1/2” grade 8

HORIZONTAL hex bolt,
lock washer
and nut

7/8” x 2 1/2” grade 5 weld only, 7/8” x 2 1/2” grade 5

hex bolt, lock washer no brace bolt hole hex bolt, lock washer
and nut and nut
b5)

7/8” X 2 1/2”
“Z” DIAGONAL ACCESS BRACE GRADE 8
HEX BOLT,
LOCK WASHER
and NUT
“Z” HORIZONTAL ACCESS BRACE

7/8” X 2 1/2” GRADE 8 HEX BOLT,

LOCK WASHER and NUT
b6)

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 Assembly

b4) Stage 4 - 6 “Z” Access Brace - “Z” Corner b5) Stage 4 - 6 “Z” Access Brace - Mid “Z”
E70XX 7/8” X 2 1/2”
E70XX
SERIES 3/8” GRADE 8
SERIES 3/8” WELDING
WELDING 3/8” HEX BOLT,
3/8” WIRE LOCK WASHER
WIRE
and NUT
E70XX
SERIES 3/8”
WELDING 3/8”
WIRE

7/8” X 2 1/2” GRADE 8

HEX BOLT, weld only,
LOCK WASHER no brace
and NUT bolt hole

E70XX
SERIES 3/8”
WELDING
3/8”
WIRE

3/8” = 10 mm

b6) Stage 4 - 6 “Z” Horizontal Access

Brace Connection

E70XX
SERIES 3/8”
WELDING
3/8”
WIRE

7/8” x 2 1/2” GRADE 8 HEX BOLT,

LOCK WASHER, and NUT

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 Assembly

Double “Z” Access Sections, Stage 4 - 6

i IMPORTANT NOTE: Double “Z” access braces
require special staging!

a3) Double “Z” Access Braces

“Z” HORIZONTAL ACCESS BRACE

Access Section (2 required)

b7)

MID HORIZONTAL
b8)

SPECIAL
STAGING
“Z” DIAGONAL ACCESS BRACE REQUIRED
(2 required)

b9)
MID HORIZONTAL
2 3/8” [64 mm] O.D. tube
(2 required)

7/8” x 2 1/2” GRADE 8

HEX BOLT,
LOCK WASHER
and NUT
(4 places)

7/8” x 2 1/2” grade 8 HEX BOLT,

LOCK WASHER, and NUT

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 Assembly

b7) Double “Z” Access Brace - “Z” Corner b8) Double “Z” Access Brace - Mid “Z”

E70XX 7/8” X 2 1/2”

E70XX grade 8
SERIES 3/8”
SERIES 3/8” WELDING
WELDING 3/8” HEX BOLT,
3/8” WIRE LOCK WASHER
WIRE
and NUT
E70XX
SERIES 3/8”
WELDING 3/8”
WIRE

7/8” X 2 1/2” GRADE 8

HEX BOLT, weld only,
LOCK WASHER no brace
and NUT bolt hole

E70XX
SERIES 3/8”
WELDING
3/8”
WIRE

3/8” = 10 mm

b9) Double “Z” Access Brace -

Center Connection

E70XX
SERIES 3/8”
WELDING
3/8”
WIRE

7/8” X 2 1/2” GRADE 8 HEX BOLT,

LOCK WASHER and NUT

E70XX
SERIES 3/8”
WELDING
3/8”
WIRE

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 Assembly

Double-Access Sections, Stage 0 - 3

Double‑access section braces are installed room is required for spouting, cleaners, etc.
instead of single access braces when more ease of installation.

ACCESS BRACES INSTALLATION, see also the previous 2 pages.

Instructions

1 Bolt both ends of the top and bottom left diagonal bolts to the inside.
horizontal access braces to the post ears.
Use the correct bolts, lock washers, and nuts. 5 Bolt the other ends of the lower diagonals
Position each horizontal access brace on the to the center brace ear on the lower horizontal
outside of the post ears. See “Single Access access brace. Use a 7/8” x 3 1/2” grade
Sections, Stage 0 - 3” on page 44 for required 8 hex bolt, lock washer, and nut for Stage
hardware. 0 and 1. Stage 2 and 3 require a 7/8” x 3 1/2”
grade 8 hex bolt lock washer, and nut. Braces
2 Bolt (1) end of both diagonals to the bolt onto the opposite sides of the brace ear.
top horizontal access brace center brace ear.
Use a 7/8” x 2 1/2” grade 8 hex bolt, nut, and 6 Torque all bolts to the correct bolt
lock washer. Bolt these braces to the opposite torques.
sides of the center brace ear.
7 Check bolt grade. Typically access braces
3 Bolt the other end of the diagonals to do not need welding. Make certain you are using
the tower post ears. Use 7/8” x 2 1/2” grade 8 the correct grade 8 bolts! Welding is still required
bolts, lock washers, and nuts for stage 0 and 1, for “Z”, Double “Z”, and Double‑Access braces,
use 7/8” x 2 1/2” grade 8 bolts, lock washers, as well as the 8 x 8 stage 5 and 6 access braces
and nuts for stage 2 and 3. (see example b on the previous page).

4 Bolt the bottom (2) diagonals to the upper 8 Weld a 1/4” [7 mm] fillet weld at all contact
post ears of the lower tower section posts. Use points between the diagonal and post ear as
the correct bolts, lock washers, and nuts. See indicated in detail c, on the next page. Repeat
the example on the next page. The right bottom the process on the other post.
diagonal bolts to the outside of the ear and the

WARNING!
Double-access sections require special
tower staging. Standard staging
may not be used. When ordering,
specify double‑access braces and the
installation height.

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 Assembly

Access Section a)
STAGE 0 - 3
E70XX
SERIES 3/8”
WELDING 3/8”
WIRE

TOP
HORIZONTAL
ACCESS
a) BRACE b) HORIZONTAL
ACCESS
BRACE
2 1/2” pipe
(2 required)

b1) Sizes 8’, 10’, 12’

[2.44 m, 3.05 m, 3.66 m]

DIAGONAL ACCESS BRACE E70XX

SERIES 3/8”
Stage 0 and 1 = 2 1/2” pipe. WELDING 3/8”
WIRE
Stage 2 and 3 = 3” O.D. Tube.
(Stage 2 and 3 has ‘P’ ears
instead of angled ends)
(4 required). (2 Places) angled end
c)

b2) Sizes 14’ - 16’

[4.23 m - 4.88 m]

E70XX
SERIES 3/8”
WELDING 3/8”
WIRE

(2 Places)
‘P’ ear

BOTTOM
HORIZONTAL
ACCESS BRACE
c) 1/4” [7 mm] Fillet Weld
(2 Places)

DETAIL a) BOLTS: Same as standard braces on page 37.

DETAIL b) BOLTS: Stage 0 - 3 = 7/8” x 3 1/2” grade 8 hex bolt, lock
washer, and nut.
E70XX
SERIES 3/8”
WELDING 3/8”
WIRE
Stage 2 and 3 = 7/8” x 3 1/2” grade 8 hex bolt, lock washer, and nut.

DETAIL c) BOLTS: Stage 0 and 1 = 7/8” x 2 1/2” hex bolt, lock

washer, and nut.
Stage 2 and 3 = 7/8” x 2 1/2” grade 8 hex bolt, lock washer, and nut.

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 Assembly

Stage 4 - 6 Tower Sections

Tower with Stage 4 - 6 Assembly
Follow the assembly procedures outlined hex bolts, lock washers, and nuts. The
on pages 29 - 40, just as you would for mid horizontal (2 3/8” [60 mm] O.D. tube)
stage 0 - 3. In addition follow the instructions requires 7/8” x 2 1/2” grade 8 minimum) hex
listed below. Identify staged sections 4 - 6 as bolts, lock washers, and nuts. At the brace
shown in example a on the next page. intersections (example a on the next page.
detail B), bolt braces together with 5/8” x 7”
Assemble the tower section as shown in
grade 2 (minimum) hex bolts, nuts and
example a on the next page. Horizontal and
lock washers. NOTE, the mid horizontal is
diagonals (2 7/8” [60 mm] O.D. pipe) bolt to
positioned between the diagonals.
the tower post ears. Use 7/8 x 2 1/2” grade 8

Stage 4 - 6 Base Section Foundation Connection

After the tower base section (the heaviest Welding Requirements for stage 4, 5, and 6 are
section) is assembled, you are ready to place it a 3/4” [20 mm] fillet weld all around the base post
on the foundation plates. Follow the instructions, connection plate. Crown the weld. Fill all bolt
page 31. Tighten all bolts to the correct torques. holes with weld.

WARNING! NOTE: Transition from Stage 4 to Stage 3 (or lower)

requires a Stage 3 “Adapter” section. Position
The 4, 5, and 6 tower plates are made of posts in the adapter section with the 3 - dot end on
top, and the 4 - dot end at the bottom as shown in
T-1 material. Therefore A LOW HYDROGEN the example on page 25.
WELDING ROD MUST BE USED. This rod
can be either E70 xx or E80 xx with the
bead size as stated above. The first pass
of weld should have short weld beads
alternated from side to side to eliminate
warping.

Stacking onto a 4 - 6 Base Section

After the tower base section (the heaviest connection plates, using 1” x 4” grade 8 hex
section) has been welded onto the foundation bolts, nuts and lock washers. Tighten all bolts
plates, you are ready to stack the next to the correct torques. FOLLOW THE NOTE
pre‑assembled sections into place. Follow ABOVE REGARDING THE TRANSITION FROM
the basic instructions outlined on page 36. STAGE 4 TO STAGE 3!
Bolt each staged section together, at the post

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 Assembly

a) Tower Section Assembly, Stage 4, 5, and 6

Basic Section HORIZONTAL
(outside at ear)
HORIZONTAL <1>
ear

<2>
DIAGONAL
(inside at ear)
A) DIAGONAL A)
<4>
MID
HORIZONTAL
<2>

B) B)
DIAGONALS,
MID HORIZONTALS
bolted at center

POST

DIAGONAL
Hardware (inside at ear)
<1> 1” x 4 grade 8 hex bolt, lock washer, and nut

<2> 7/8” x 2 1/2” grade 8 hex bolt, lock washer, and nut
C) <1> C)
<4> 5/8” x 7” grade 2 hex bolt, lock washer, and nut

b) Single Access Assembly, Stage 4, 5, and 6

Access Section

UPPER
A) B) HORIZONTAL A
MID
DIAGONAL ACCESS
BRACE

C) B

MID
HORIZONTAL
LOWER
DIAGONAL HORIZONTAL
ACCESS
BRACE
C

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 Assembly

Access Sections, Stage 4 - 6

Install access braces at the same time the tower is constructed.

INSTALL ACCESS BRACES

1 stack access sections 3 access section welding

Use the standard hardware and Check the bolt grade. Typically access braces
(3) 7/8” grade 8 bolts, nuts and lock washers do not need welding. Please make certain you
for additional connections, assemble access aren’t using lighter grade bolts that are for use
braces as shown in example b on the previous elsewhere in the tower. Welding is required on:
page. Stack and/or install tower sections with • All “Z” access braces, stages 04 - 06.
access braces as you would a standard tower • All double “Z” access braces, stages 04 - 06.
section (see page 54.) • All double “A” access braces, stages 04-06.
• 8’ x 8’ [2,438 mm x 2,438 mm] access braces,
stages 05 - 06.
2 tighten all brace connections Strictly follow these instructions when
After a tower section with access braces is making these welds: Weld the ends of all
in place in the tower, tighten all bolts to the braces where they contact the post ears using a
correct torques. 3/8” fillet weld. Use the welding instructions on
pages 46 - 53. Do not remove bolts, lock
washers, and nuts after welding.
WARNING!
If access braces are installed at the base
tower section, the bottom horizontal
(access brace) may be removed after the
other braces are welded into place. The
bottom horizontal (access brace) must
not be removed from the access braces
in any other tower section!

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 Assembly

6 - Post Tower Sections

Instructions

If you are assembling a 6-post tower that 4 Follow the instructions on page 31
uses stage 4 - 6, see also the pages and to place the base stage onto the foundation
instructions noted in parentheses. plates (Stage 4 - 6. See pages 54 - 55.)

1 See the diagonals and horizontal 5 Refer to steps 1 and 2 again and
instructions on pages 30. Bolt together pre‑assemble the next heaviest stage. Lift
(1) section (section A, example below). Use the assembled section A into place and bolt
(4) standard corner posts and 2 mid posts. it onto the base section with the correct
Use the heaviest section as the base stage. hardware. Next, lift the assembled section B
into place. Make certain the post ears face the
(Stage 4 - 6. Also install mid horizontals. See
pages 54 - 55.) other section, then bolt together at the corner
post plates. Install diagonals and horizontals
2 Assemble the last 2 posts (section B, between sections A and B as described on
example below), diagonals, and horizontals page 30 (stage 4 - 6, See also page 54).
of the correct stage as shown in the example Then follow the instructions on page 36
below. (Stage 4 - 6. See pages 54 - 55.) (stage 4 - 6, page 54).

3 Place the base stage, section A onto the

foundation plates. Then lift the assembled
base stage, section B onto the foundation
plates. Install horizontals and diagonals
between sections A and B as explained on
previous pages.

6 - Post Tower Pre-assembly

SECTION B
SECTION A

INTERNAL POST
(post ears welded on 3 sides)

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 Assembly

WARNING!
Foundation Considerations (including the site and foundation design for the
Foundation Plan) in this manual are to adequate support of this tower. Brownie
be considered general in nature and are Systems assumes no responsibility for
intended only as a guide. It is the owner’s results arising from these suggestions.
responsibility to provide an appropriate

Base Dimensions - 6 Post Towers and Post Connection Plates

Size A, B, or C
A (see table)
2’ 1’ - 8”
[610 mm] [508 mm]
double post tower face 4’ 3’ - 8”
[1,219 mm] [1,118 mm]

6’ 5’ - 8”
[1,829 mm] [1,727 mm]

triple post tower face

8’ 7’ - 9”
[2,438 mm] [2,362 mm]
B (see table) 10’ 9’ - 8”
[3,048 mm] [2,946 mm]

12’ 11’ - 8”
[3,658 mm] [3,556 mm]

14’ 13’ - 8”
[4,267 mm] [4,166 mm]

16’ 15’ - 8”
[4,877 mm] [4,775 mm]
triple post tower face

C (see table)

“D” radius “D” radius

22.5° 22.5°

“E” diameter
“C” radius “E” diameter “C” radius
PLATE ORIENTATION PLATE ORIENTATION
STAGE 0, 1, 2, AND 3 STAGE 4, 5, AND 6

Stage “C” “D” “E”

0, 1, 2, & 3 3-3/16” [81 mm] 4-1/8” [105 mm] 11/16” [17 mm]
4, 5, & 6 3-3/4” [95 mm] 5-1/8” [133 mm] 1-1/16” [27 mm]

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 Assembly

Square Tower Side Braces

This page placed here for use in later editions of this manual.

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 <7> Tower Stairway
Tower Stairway Specifications
Tower stairways are available for 8’, 10’, 12’, 14’,
and 16’ tower sizes (for [2,438 mm, 3,048 mm,
3,657 mm, and 4,878 mm] sizes).
All tower stairway sections are manufactured for
10’ [3,048 mm] of rise.

WARNING!
Any alterations to the product or deviation
from instructed assembly and installation
procedures, without the authorization of
Brownie Systems is prohibited.

Tower Stair Sections Weights Required Tools:

7/16” open-end wrench and socket
Tower Stair Weight 1/2” open-end wrench and socket
8’ [2438 mm] Starter Tower Stair 270 lb [123 kg] 9/16” open-end wrench and socket
1-1/8” open-end wrench and socket
8’ [2438 mm] Tower Stair 273 lb [124 kg] torque wrench
10’ [3048 mm] Tower Stair 303 lb [138 kg]
12’ [3658 mm] Tower Stair 335 lb [152 kg]
14’ [4267 mm] Tower Stair 376 lb [171 kg]
16’ [4877 mm] Tower Stair 400 lb [182 kg]

Tower Stairs Landings Weights

Tower Stair Weight
Tower Corner Landing 151 lb [69 kg]
Tower Switchback Landing R.H. 263 lb [120 kg]
Tower Switchback Landing L.H. 263 lb [120 kg]
Tower Top Landing 289 lb [132 kg]

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 Tower Stairway

Example Tower Stairway and Landings

NOTE: When using switchback landings, make
certain to position the starter stair section correctly
so the top stair section will land against the tower TOP LANDING
and correctly meet with the top landing. For example:
On even-height towers, the starter stair section
must be installed at the outer connection on the first
switchback landing away from the tower base so the
stairs will land correctly at the top landing.

CORNER
LANDING

SWITCHBACK
LANDING

SWITCHBACK
LANDING

CORNER
LANDING

TOWER
BASE SECTION

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 Tower Stairway

Tower Stairway Parts

STAIR
HARDWARE SECTION
(PN 4800106)

Part
Description Quantity
Number

068819
3/8” NC x 2 1/2” grade 2 6 (8’-12’)
90005021
hex bolt, nut, and lock washer 8 (14’ - 16’)
90010021

1714678
7/16” NC x 1 1/2” grade 2
1714682 4
hex bolt, nut, and lock washer
90010030

1929023 1 1/2” [38 mm] square plastic plugs 4

Part STARTER
Assembly Number Description Quantity STAIR
(PN) SECTION
4502050 starter stair 1
starter stair,
4502101 8’ [2,438 mm] tower stair handrail 2
(PN 4502000)
4800106 hardware package 1
4502051 8’ [2,438 mm] stair 1
8’ tower stair,
4502101 8’ [2,438 mm] tower stair handrail 2
(PN 4502001)
4800106 hardware package 1
4502052 10’ [3,048 mm] stair 1
10’ tower stair,
4502103 10’ [3,048 mm] tower stair handrail 2
(PN 4502002)
4800106 hardware package 1
4502053 12’ [3,658 mm] stair 1
12’ tower stair
4502105 12’ [3,658 mm] tower stair handrail 2
(PN 4502003)
4800106 hardware package 1
4502054 14’ [4,267 mm] stair 1
14’ tower stair
4502104 14’ [4,267 mm] tower stair handrail 2
(PN 4502004)
4800107 hardware package 1
4502055 16’ [4,877 mm] stair 1
16’ tower stair
4502107 16’ [4,877 mm] tower stair handrail 2
(PN 4502005)
4800107 hardware package 1
STARTER
* a ‘G’ is placed before the part number with galvanized parts STAIR
(e.g. G4502050) SECTION

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 Tower Stairway

Tower Stairway Parts

Corner Landing
part
assembly description quantity
number
4502088 32 1/4” [819 mm] H handrail 1
4502091 P handrail 1
stage 0 - 3 4502095 vertical brace 1
(pn 4997008) 4502098 44 11/16” [1,135 mm] kicker 2
4997007 landing stage 0 - 3 1
4800104 hardware package 1 SWITCHBACK stg 0 - 3 | RH - 4997011 CORNER LANDING
4502088 32 1/4” [819 mm] H handrail 1 LANDING LH - 4997013 stg 0 - 3 | 4997007
4502091 P handrail 1 stg 4 - 6 | RH - 4502080 stg 4 - 6 | 4502076
4502095 vertical brace 1 LH - 4502082
stage 4 - 6
(pn 4502026) 4502098 44 11/16” [1,135 mm] kicker 2
4502076 landing stage 4 - 6 2
4800104 hardware package 1

Right Hand Switchback Landing

part
assembly description quantity
number
4502086 67-13/16” [1,722 mm] toeboard 1
4502088 32 1/4” [819 mm] H handrail 1 TOP LANDING
4502089 switchback rail assembly 1 stg 0 - 3 | 4997009
stage 0 - 3 4502092 29” [737 mm] short H handrail 1
(pn 4997012) 4502097 switchback vertical brace 1
32 1/4” [819 mm]
4502099 74 9/16” [1,722 mm] kicker 2 H HANDRAIL
4997011 RH landing stage 0 - 3 1
4502088
4800102 hardware package 1
4502086 67-13/16” [1,722 mm] toeboard 1
4502088 32 1/4” [819 mm] H handrail 1
4502089 switchback rail assembly 1
stage 4 - 6 4502092 29” [737 mm] short H handrail 1
(pn 4502030) 4502097 switchback vertical brace 1
4502099 74 9/16” [1,894 mm] kicker 2
RAIL ASSEMBLY
4502080 RH landing stage 4 - 6 1 68 5/16” [1,735 mm] - 4502089
4800102 hardware package 1 76 1/8” [1,934 mm] - 4502090

Left Hand Switchback Landing

P HANDRAIL
part 4502091
assembly description quantity
number
4502086 switchback toe board 1
VERTICAL 68 5/16” [1,735 mm] 75 5/8” [1,921 mm]
4502088 32 1/4” [819 mm] H handrail 1
BRACE TOE BOARD TOE BOARD
4502089 switchback rail assembly 1
4502086 4502085
stage 0 - 3 4502092 29” [737 mm] short H handrail 1 4502095
(pn 4997014) 4502097 switchback vertical brace 1 4502096
4502099 74 9/16” [1,894 mm] kicker 2 4502097
4997013 LH landing stage 0 - 3 1
4800102 hardware package 1 KICKER
4502082 LH landing stage 4 - 6 1
4502086 68 5/16” switchback toe bd. 1
4502088 32 1/4” [819 mm] H handrail 1
stage 4 - 6 4502089 switchback rail assembly 1
(pn 4502032) 4502092 29” [737 mm] short H handrail 1
4502097 switchback vertical brace 1
4502099 74 9/16” [1,894 mm] kicker 2
4800102 hardware package 1

Top Landing
part
assembly description quantity
number
4502085 75 5/8” [1,921 mm] toe board 1
4502088 32 1/4” [819 mm] H handrail 2
4502090 76 1/8” [1,934 mm] handrail 1
stage 0 - 3
4502096 vertical brace 1
(pn 4997010) SHORT H
4502098 44 11/16” [1,135 mm] kicker 3 69 1/2” [1,765 mm] HANDRAIL
4997009 landing stage 0 - 3 1 29” [737 mm] HANDRAIL
4800105 hardware package 1 4502092

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 Tower Stairway

Stairs Assembly
1 install handrails to stairs galvanized stairs.) Connect handrails to stairs.
Use 3/8” NC x 2 1/2” grade 2 hex bolts, lock
Install handrails to stairs as shown. Place washers, and nuts. Tighten all bolts to the
a 1 1/2” [38 mm] plastic square cap at correct torques.
each handrail end. (Caps are not used on

HANDRAIL
PLASTIC
SQUARE CAP

STAIR

ASSEMBLED
STAIR

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 Tower Stairway

Corner Landing Assembly

Corner Landing Assembly
NOTE: Use only the correct hardware. Use only the
hardware which is provided by Brownie Systems!

1 tighten all bolt connections

view AA
Install the corner landing to the tower
post connection plates. The landing must A A
be installed to the underside of the post
connection plates. Use the correct hex bolts,
lock washers, and nuts. For stage 0 - 3, use
5/8” x 2 1/2” grade 8 hardware. For stage LANDING
5 and 6, use 1” x 4” grade 8 hardware.
(Optional) After the landing is bolted to
the post, tack weld the landing to the post
connection plates and remove the bolts.

2 install the vertical support brace VERTICAL

SUPPORT
1

BRACE
Install the vertical support brace to the tower installation,
post. Use a 7/16” x 1 1/2” hex bolt, lock side view
washer, and nut. Install the vertical support
KICKER BRACE VERTICAL
brace in the correct position as shown in the SUPPORT
examples at right. Clamp the vertical support BRACE
brace to the landing at the platform location. 2
3 2
Use a 4” U-bolt, lock washer, and nut. 3
2

3 install the kicker brace 3

Install the kicker braces to the landing and

vertical support brace in the correct position
(as shown in the examples at right). Connect VERTICAL
the kicker braces to the landing locations SUPPORT
and to the vertical support locations. Use BRACE
installation,
(2) 7/16” x 1 1/2” hex bolts, lock washers, and bottom view 1
nuts. Tighten all bolts to the correct torques.
5

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 Tower Stairway

4 install handrails used on galvanized handrails). Connect the

handrails to the landing. Use 3/8”NC x 2 1/2”
Place (1) 32 1/4” [819 mm] handrail and grade 2 hex bolts, lock washers, and nuts.
(1) 33 15/16” [862 mm] handrail. Place a Connect handrail to handrail. Use 3/8” x 3 1/2”
1 1/2” [38 mm] plastic square cap at each grade 2 hex bolts, lock washers, and nuts.
handrail end. (Plastic square caps are not Tighten all bolts to the correct torques.

Install Corner Landing Handrails

32 1/4” [819 mm]

1
HANDRAIL 1 1/2” [38 mm]
PLASTIC
5
SQUARE CAP

2 2
4
3 3

A
view A - A
2 3

33 15/16” [862 mm] HANDRAIL

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 Tower Stairway

Switchback Landing Assembly

1 install the landing to the tower 2 install the vertical support brace
Install the switchback landing to the tower Install the vertical support brace to the
post connection plates. The landing must landing at the platform. Use (1) 7/16” x 1 1/2”
be installed to the underside of the post hex bolt, lock washer, and nut. Connect the
connection plates. Note the correct position in vertical support brace to the tower post using
the examples on this page. Connect the corner (1) 4” U‑bolt, lock washers, and nuts.
landing to the post connection plates. Use a
hex bolt, lock washer, and nut. Stage 0 - 3 use
5/8” x 2 1/2” grade 8 hardware. Stage 4 - 6
use 1” x 4” grade 8 hardware. (Optional) After
the landing is bolted to the post, tack weld
the landing to the post connection plates and
remove all bolts.

Install the Switchback Landing to the Tower

LANDING
A

SWITCHBACK LANDING
view A - A
to tower
post installation 2

VERTICAL
SUPPORT BRACE
to TOWER POST
installation

2
1

VERTICAL SUPPORT BRACE installation,

bottom view

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 Tower Stairway

3 install the kicker braces NOTE: The example below identifies (2) 4 locations.
A left hand switchback landing requires a
Install (2) 74 9/16” [1,894 mm] kicker braces to connection at the left hand location. The right hand
the landing and vertical support brace. Note the switchback landing requires a connection at the
correct position in the examples on this page. right hand location.
Connect the kicker brace to the landing and to
the vertical support brace. Use 7/16” x 1 1/2” hex
bolts, lock washers, and nuts at each location.

Install the Switchback Landing Kicker Braces

LANDING

5
KICKER BRACE B

left hand
SWITCHBACK
LANDING only

6
KICKER BRACE A
4

KICKER BRACE installation, bottom view

right hand
SWITCHBACK
LANDING only

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 Tower Stairway

4 install handrails hex bolts, lock washers, and nuts. Connect

the 68 5/16” handrail to the 29” [737 mm] and
Place (1) 29” [737 mm], (1) 32 1/4” [819 mm], 32 1/4” [819 mm] handrails. Use 3/8” x 3 1/2” hex
(1) 68 5/16” [1,735 mm] handrails and bolts, lock washers, and nuts. At the same time,
(1) 67 13/16” [1,722 mm] toe board. Place a connect the 67 13/16” [1,737 mm] toe boards
1 1/2” [38 mm] plastic square cap at each handrail to the 68 5/16” [1,735 mm] handrail and other
end. (Plastic square caps are not used on handrails. Use the 3/8” x 2 1/2” grade 2 hex
galvanized handrails). Connect the 29” [737 mm] bolts, lock washers, and nuts. Tighten all bolts to
and the 32 1/4” [819 mm] handrails to the landing the correct torques.
locations 2 and 3 . Use 3/8”NC x 2 1/2” grade 2

Install Switchback Landing Handrails

1
68 13/16” [1,748 mm] TOE BOARD
B B
1 5 4
6 6

5 4
4 4

7 5 68 5/16” [1,659 mm] toe board 5 7 1

2 3 3 2

7
6

view A - A view B - B
A 2 3
3 2
32 1/4” [819 mm]
A HANDRAIL

29” [737 mm]

HANDRAIL

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 Tower Stairway

Tower Top Landing Assembly

1 install the top landing base washer, and nut. Clamp the vertical support
brace to the tower post. Use (1) 4” U-bolt, lock
Install the top landing base to the tower post washer, and nut. Connect the kicker braces to
connection plates. The landing must be installed the landing and vertical support brace. Use (4)
to the underside of the tower post connection 7/16” x 1 1/2” hex bolt, lock washer, and nut. Use
plates. Install the vertical support brace to the (2) 7/16” x 1 1/2” hex bolts, lock washers, and
landing. Use (1) 7/16” x 1 1/2” hex bolt, lock nuts. Tighten all bolts to the correct torques.

Install the Tower Top Landing Base to the Tower

LANDING 1

view A - A

A
LANDING
2

VERTICAL SUPPORT
TOP LANDING to BRACE installation
TOWER POST
connection

KICKER BRACE A KICKER BRACE A

2 2
4 4 3 3

VERTICAL SUPPORT BRACE

KICKER BRACE B installation, bottom view

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 Tower Stairway

2 install handrails locations 2 and 3 . Use 3/8” NC x 2 1/2”

grade 2 hex bolts, lock washers, and nuts.
View the example on this page. Place Connect the 76 1/8” [1,937 mm] handrail to the
(2) 32 1/4” [819 mm] and (1) 76 1/8” [1,934 mm] 32 1/4” [819 mm] handrails. Use 3/8” NC x 3 1/2”
handrails and (1) 75 5/8” [1,921 mm] toe board. grade 2 hex bolts, lock washers, and nuts.
Place a 1 1/2” [13 mm] plastic square cap at Connect the 76 5/8” [1,946 mm] toe board to
each handrail end. (Plastic square caps are the 76 1/8” [1,934 mm] handrail as shown. Use
not used on galvanized handrails.) Connect 3/8” NC x 2 1/2” grade 2 hex bolt, lock washers,
the 32 1/4” [819 mm] handrails to landing and nuts. Tighten all bolts to the correct torques.

Install the Handrails to the Tower Top Landing

75 5/8” [1,921 mm] TOE BOARD B B

6 6

4 4

76 1/8” [1,936 mm] HANDRAIL

7 5 5 7

2 3 3 2
32 1/4”
[819 mm]
32 1/4” HANDRAIL
[819 mm]
HANDRAIL
A
2 3 3 2

A
1

1 5 4

5 4

32 1/4” 32 1/4”
[819 mm] 1 [819 mm]
HANDRAIL HANDRAIL

view A - A 6 view B - B

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 Tower Stairway

Tower Stairs to Landing Connection

1 install the starter stair section NOTE: The starter stair is always placed at the base
(ground) level.
Place (1) starter stair section and
(2) 8’ [2,438 mm] handrails. Lift the stair up
to the landing and connect the upper end
of the stair to the landing receiver with the
locating pin. Note the correct position shown
in the example on this page. Install hardware
in (1) of the (2) holes typical for each side.
Use 7/16” NC x 1 1/2” grade 2 hex bolts, lock
washers, and nuts. Tighten all bolts to the
correct torques.

Install the Starter Stair Section

view A - A
A 2

LANDING
1

STARTER
STAIR
SECTION

stairway to landing installation

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 <8> Tower Ladder
NOTE: Read and understand the complete Tower
Ladder section of this manual before starting tower
WARNING!
construction. OSHA REGULATION: 1910.27(d)(2)
“Landing platforms.” When ladders are
used to ascend to heights exceeding
20 feet (except on chimneys), landing
platforms shall be provided for each
30 feet of height or fraction thereof, except
that, where no cage, well, or ladder safety
device is provided, landing platforms shall
be provided for each 20 feet or height or
fraction thereof. Each ladder section shall
be offset from adjacent sections. Where
installation conditions (even for a short,
unbroken length) require that adjacent
sections be offset, landing platforms shall
be provided at each offset.

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 Tower Ladder

1 determine the ladder layout 3 towers and ladders terminations

Before the tower is constructed, determine the Install ladder horizontal angles at the base of
complete tower ladder layout and locations. each tower section where ladders are installed.
(The ladder horizontal angle is only inverted
and installed at the top of a tower section at the
2 start ladder installation tower top termination. At the tower top location
Install the tower ladder to the tower as you the angle replaces the top tower horizontal at
build this tower from the top to the base. the ladder location.) Install ladder mid angles at
each location where a ladder run terminates in
the middle of a tower section. See the following
(4) examples which illustrate the required
ladder angles installation.

Ladder Angles Identification Drawing

10’ [3,048 mm] length

LADDER part number 3501134
MID ANGLE

10’ [3,048 mm] length

part number 3501151

LADDER HORIZONTAL ANGLE

(Ladder angles for (2) different tower sizes are shown above.)

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 Tower Ladder

Install Ladder Horizontal Angles to Support Each Ladder Run

LADDER
HORIZONTAL
ANGLE

LADDER
MID ANGLE
(Used to terminate a
ladder run in the middle of
a tower section)

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 Tower Ladder

Ladder Bracket to Ladder Horizontal Angle Top View

3/8” NYLOCK NUT

90005024

3/8”
TOWER POST GRADE 5 BOLT Use the bolt, lock
washer, and nut
which are standard
for the tower stage
TOWER LADDER where the bottom
LADDER angle is installed.
BRACKET
3501127
LADDER
HORIZONTAL LADDER CLIP
ANGLE AND BOLT
LADDER SECTION
088028

Ladder End Bracket to Ladder Mid Angle Top View

1/2” x 4” x 5 1/2” U-BOLT 3/8” NYLOCK NUT

90031038 90005024

TOWER POST
LADDER
MID ANGLE
1/2” HEX NUT
018912
3/8” GRADE 5 BOLT
TOWER LADDER
END BRACKET 3/8” NYLOCK NUT
TOP LADDER LADDER CLIP and BOLT
3501129 90005024
SECTION 088028

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 Tower Ladder

4 install ladders to ladder angles WARNING!

Replace tower (tube) horizontals with ladder
Install ladder brackets where needed!
horizontal angles at the locations where the
Secure the ladder for safe ascending and
tower ladder is installed. Read and understand
descending.
the examples and instructions on this page and
pages 73 - 80 before installing ladders.

Ladder Run at Top, 4’ x 4’ Tower

TOWER LADDER TOWER

end bracket POST
(3501129)

LADDER CLIP
AND BOLT
088028

TOP LADDER
SECTION
LADDER
MID ANGLE

Top View, Ladder Clip and Bolt Top View, Ladder Clip and Bolt
LADDER CLIP AND BOLT, LADDER CLIP AND BOLT,
PRE-ASSEMBLED ASSEMBLED
NOTE how the clip
flattens out.

(088028) (088028)

LADDER LADDER
BRACKET BRACKET

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 Tower Ladder

5 installation
Connect the safety cages to the ladders where
required. Use the provided ladder clip and bolt
assemblies. Assemble each ladder section
together. Use the provided ladder splices
and ladder splice hardware. See the following
(5) ladder and cage assembly examples.
Install ladders and cages after reading and
understanding all instructions and examples on
pages 73 - 80.

NOTE: OSHA REGULATION - Subpart D., Section

1910.27 (d) (iv) states in part. “Cages shall extend
down the ladder to a point not less than seven
feet (7’) nor more than eight feet (8’) above the base
of the ladder.”

Outside Ladder with Cage Assembly

LADDER
SECTION

LADDER CAGE
D‑RING

LADDER CAGE
UPRIGHT

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 Tower Ladder

Ladder Connection Assembly Top View, Ladder Splice

LADDER SECTION CONNECTIONS TOP VIEW, LADDER SPLICE

LADDER
SPLICE LADDER
088029 SIDE RAIL
LADDER SPLICE
088029

5/16” BIN BOLT,

HEX NUT and WASHER

LADDER SECTION

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 Tower Ladder

Cage with Double D-Ring Cage End View

TYPICAL LADDER CAGE PARTS LAYOUT

CAGE ASSEMBLY
at PLATFORM

LADDER CAGE
UPRIGHT
D-RING HALF

LADDER CAGE
DOUBLE D-RING

STANDARD
D-RING

DOUBLE D‑RING
used to join CAGE
SECTIONS together

Flared Cage

LADDER CAGE
UPRIGHT
FLARED D-RING
used at the
bottom of all cage
assemblies

LADDER
CAGE
FLARED
D-RING

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 Tower Ladder

Tower Ladder Landing

1 start ladder landing installation into position. After it is in position, support

the landing base during installation. Connect
After the ladder run leading up to the ladder the landing base to the underside of the post
is completely installed, start the tower ladder connection plates. Install the landing kickers to
landing installation. Install the vertical support the vertical support brace. Use 7/16” x 1 1/2”
brace and kicker braces to the underside of bolts. Install the vertical support brace to the
the landing base at the locations shown in the tower post. Use the provided U‑bolt, lock
example below. Use 7/16” x 1 1/2” hex bolts, washers, and nuts. See the examples on this
lock washers, and nuts. Lift the landing base page and the following (3) pages.

Install the Tower Landing Base

TOWER LADDER
LANDING BASE
4502601

view A - A
The top landing must
be connected to the
TOWER
underside of the tower
POST
post connection plates!
A

TOWER LADDER TOWER

LANDING BASE POST 1/2” x 4” x 5” U-BOLT LANDING
4502601 90031038 KICKERS
LANDING 4502098
KICKERS
4502098

2 2

VERTICAL SUPPORT BRACE

4502096

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 Tower Ladder

NOTE: This installation may require a ladder-landing

components assembly order different than is
suggested.

Ladder Landing Base Installation Suggested Order of Steps

POST CONNECTION PLATES

the landing base must be connected

to the underside of the tower post
connection plate

TOWER LADDER
2 LANDING BASE
4502601

1 1

VERTICAL SUPPORT
BRACE
4502096

4
LANDING KICKER
4502098
3

TOWER POST
1/2” x 4” x 5” U-BOLT
90031038

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 Tower Ladder

Platform Base to Post Connection Plate Connection

the landing base must be

connected to the underside of the
tower post connection plate

POST CONNECTION PLATES

TOWER LADDER
LANDING BASE
4502601

VIEW A - A

A A

POST CONNECTION PLATES

the landing base must be

connected to the underside of the
tower post connection plate

typical location
for a LADDER
HORIZONTAL ANGLE

TOWER LADDER
TOWER POST LANDING BASE
4502601

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 Tower Ladder

Install Support Braces to the Tower Post

* =KICKER
LANDING

4502098

LADDER
HORIZONTAL VERTICAL
ANGLE SUPPORT
BRACE
4502096

*
*

Platform Base and Supporting Braces

* = LANDING KICKER
* *
VERTICAL SUPPORT
PLATFORM
BRACE
BASE
* TOWER POST

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 Tower Ladder

2 complete landing installation nuts. Install the 75 5/8” [1,921 mm] toe-board
between the end handrails. Use 3/8” x 2 1/2”
Install 1 1/2” [38 mm] square caps at each hex bolts and nuts. Assemble the ladder cage
handrail end. See the next page. Install the uprights to the half D-rings. Use 5/16” bin
handrails around the landing base as shown bolts and nuts. Connect the half D-rings with
below; use 3/8” x 2 1/2” hex bolts and nuts. the landing handrail using connection straps.
Connect the 76 1/8” [1,934 mm] handrail to the Connect the half D-ring ends to the ladder
end handrails. Use 3/8” x 3 1/2” hex bolts and using clips and bolts.

Install Handrails, Toe Boards, and Ladder Cage, 4’ x 4’ x 10’ Tower Shown

BACK HANDRAIL /
TOE-BOARD
4502603

continuing
LADDER SECTION

D-RING
HALF
END HANDRAIL /
TOE BOARD
4502602

CONNECTION
STRAP

CAGE
UPRIGHTS 76 1/8”
[1,934 mm]
HANDRAIL
(4502090)

END HANDRAIL / TOWER LADDER

TOE BOARD LANDING BASE
4502602 4502601

75 5/8” [1,934 mm]

TOE BOARD
4502085

4’ X 4’ X 10’ = [1219 mm x 1219 mm x 3048 mm]

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 Tower Ladder

NOTE: 1 1/2” [38 mm] square caps are not used on

galvanized handrails.

3 continue ladder installation

Tower ladder base clips, washers, and
diamond anchors must be used to connect the
continuing ladder section with the landing base.
Continue ladder installation. Follow the ladder
installation instructions.

Install Handrail Caps Ladder Installation, 10’ x 10’ x 10’ Tower Shown

76 1/8” [1,934 mm]

1 1/2” [38 mm]
HANDRAIL, 4502090
PLASTIC
SQUARE CAP
1929023
LADDER
SECTION
TOWER LADDER
BASE CLIP

LANDING
BASE

75 5/8” BOLT, FLAT

END HANDRAIL / [1,921 mm] WASHER &
TOE BOARD TOE BOARD DIAMOND
4502602 4502085 ANCHOR

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 Tower Ladder

Ladder Step - Thru

1 install extension rails extensions are connected to the ladder section

below. Use the extension connections. Use
Extension rails are used to walk “through” 5/16” bolts and nuts. Stabilize the rails to the
the ladder and onto a tower platform. The platform using the braces.

Ladder Step-Thru Assembly

EXTENSION
SPLICE
080083
EXTENSION
RAIL
080085

5/16” BIN
BOLT / SEAL
WASHER
004178 5/16” NUT
018913

LADDER SECTION

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 Tower Ladder

Ladder Stacking Drawings

Following are examples of some common
ladder stacking drawings. Use the following WARNING!
drawings to assemble the ladder.
OSHA REGULATION: 1910.27(d)(2)
“Landing platforms.” When ladders are
used to ascend to heights exceeding
20 feet (except on chimneys), landing
platforms shall be provided for each
30 feet of height or fraction thereof, except
that, where no cage, well, or ladder safety
device is provided, landing platforms shall
be provided for each 20 feet or height or
fraction thereof. Each ladder section shall
be offset from adjacent sections. Where
installation conditions (even for a short,
unbroken length) require that adjacent
sections be offset, landing platforms shall
be provided at each offset.

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 Tower Ladder

10’ [3,048 mm] Tower Ladder Package with Platform

5’ [1,524 mm] LADDER

LADDER SECTION CAGE
10021889 CONNECTOR
STRAP
080082

LADDER CAGE TOWER LADDER

D-RING HALF LANDING
080081 4502600

PLATFORM
CAGE UPRIGHT
080086

28” [711 mm]

LADDER CAGE D-RING
LADDER 080024
HORIZONTAL
ANGLE

2’ [610 mm]
LADDER CAGE
UPRIGHT
080068

32” [813 mm]

LADDER CAGE
D‑RING
080023

10’ [3,048 mm]

LADDER SECTION
10021887

LADDER
TOWER LADDER
HORIZONTAL BRACKET
ANGLE 3501127

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 Tower Ladder

15’ [4,572 mm] Tower Ladder Package with Platform

LADDER CAGE LADDER CAGE

D-RING HALF CONNECTOR
080081 STRAP
080082

PLATFORM TOWER LADDER

CAGE UPRIGHT LANDING
080086 4502600

28” [711 mm]

LADDER CAGE D-RING
LADDER 080024
HORIZONTAL
ANGLE

5’ [1,524 mm]
LADDER CAGE
UPRIGHT
080053
LADDER
HORIZONTAL 28” [711 mm]
ANGLE LADDER CAGE
DOUBLE D‑RING
080054

2’ [610 mm]
LADDER CAGE
UPRIGHT
080068

32” [813 mm]

LADDER CAGE
D‑RING
080023

10’ [3,048 mm]

LADDER SECTION
10021887
LADDER
HORIZONTAL
ANGLE
TOWER LADDER
BRACKET
3501127

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 Tower Ladder

20’ [6,096 mm] Tower Ladder Package with Platform

LADDER CAGE 5’ [1,524 mm] LADDER CAGE

D-RING HALF LADDER SECTION CONNECTOR
080081 10021889 STRAP
080082
PLATFORM TOWER LADDER
CAGE UPRIGHT LANDING
080086 4502600

28” [711 mm]

LADDER CAGE D‑RING
080024

LADDER
HORIZONTAL
ANGLE

10’ [3,048 mm]

LADDER CAGE
UPRIGHT
080052

28” [711 mm]

LADDER LADDER CAGE
HORIZONTAL DOUBLE D‑RING
ANGLE 080054
2’ [610 mm]
LADDER CAGE
UPRIGHT
080068

32” [813 mm]

LADDER CAGE
D‑RING
080023
LADDER
HORIZONTAL 10’ [3,048 mm]
LADDER SECTION
ANGLE
10021887
TOWER LADDER
BRACKET
3501127

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 Tower Ladder

25’ [7,620 mm] Tower Ladder Package with Platform

10’ [3,048 mm] LADDER CAGE

LADDER SECTION CONNECTOR STRAP
10021887 080082

LADDER CAGE TOWER LADDER

D-RING HALF LANDING
LADDER 080081 4502600
HORIZONTAL
PLATFORM 28” [711 mm]
ANGLE
CAGE UPRIGHT LADDER CAGE D‑RING
080086 080024

4’ [1,219 mm]
LADDER CAGE
UPRIGHT
080026
8’ [2,438 mm]
LADDER CAGE
LADDER UPRIGHT
HORIZONTAL 080025
ANGLE

28” [711 mm]

LADDER CAGE
DOUBLE D-RING
080054

LADDER
HORIZONTAL
ANGLE

5’ [1,524 mm]
LADDER CAGE
UPRIGHT
080053

32” [813 mm]

LADDER CAGE
D‑RING
080023
TOWER LADDER
BRACKET
LADDER 3501127
HORIZONTAL
ANGLE

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 Tower Ladder

30’ [9,144 mm] Tower Ladder Package with Platform

5’ [1,524 mm] LADDER CAGE

LADDER SECTION CONNECTOR STRAP
10021889 080082
LADDER CAGE TOWER LADDER
D‑RING HALF LANDING
080081 4502600
PLATFORM
CAGE UPRIGHT 28” [711 mm]
080086 LADDER CAGE D‑RING
080024

LADDER
HORIZONTAL 4’ [1,219 mm]
ANGLE LADDER CAGE
UPRIGHT
080026

LADDER
HORIZONTAL
ANGLE

8’ [2,438 mm]
LADDER CAGE
UPRIGHT
080025

28” [711 mm]

LADDER CAGE
DOUBLE D‑RING
080054

LADDER
HORIZONTAL
ANGLE 10’ [3,048 mm]
LADDER CAGE
UPRIGHT
080052

32” [813 mm]

LADDER CAGE D-RING
080023

LADDER 10’ [3,048 mm]

LADDER SECTION
HORIZONTAL
10021887
ANGLE
TOWER LADDER
BRACKET
3501127

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 Tower Ladder

10’ [3,048 mm] Tower Ladder Package with Step-Thru

WARNING!
Ladder extension rails are not self supporting and
must be supported adequately! Supports are not
supplied by Brownie Systems.

LADDER CAGE LADDER

EXTENSION D-RING EXTENSION RAIL
080087 080085

4’ [1,219 mm]
LADDER CAGE
UPRIGHT
080026

LADDER 28” [711 mm]

HORIZONTAL LADDER CAGE
DOUBLE D-RING
ANGLE
080054

LADDER EXTENSION
SPLICE
080083

2’ [610 mm]
LADDER CAGE
UPRIGHT
080068

32” [813 mm]

LADDER CAGE D‑RING
080023

10’ [3,048 mm]

LADDER SECTION
10021887

LADDER
HORIZONTAL
ANGLE

TOWER
LADDER BRACKET
3501127

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 Tower Ladder

20’ [6,096 mm] Tower Ladder Package with Step-Thru

LADDER CAGE
WARNING! EXTENSION D‑RING
080087

Ladder extension rails are not self supporting and

must be supported adequately! Supports are not LADDER
EXTENSION RAIL
supplied by Brownie Systems. 080085

28” [711 mm]

LADDER CAGE D‑RING
080054

LADDER EXTENSION
SPLICE
LADDER 080083
HORIZONTAL
ANGLE 28” [711 mm]
REGULAR D‑RING
080024

8’ [2,438 mm]
LADDER CAGE
UPRIGHT
080025
28” [711 mm]
LADDER CAGE
DOUBLE D‑RING
LADDER 080054
HORIZONTAL
ANGLE

32” [813 mm]

LADDER CAGE D‑RING
080023

10’ [3,048 mm]

LADDER LADDER SECTION
HORIZONTAL 10021887
ANGLE

TOWER LADDER
BRACKET
3501127

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 Tower Ladder

30’ [9,144 mm] Tower Ladder Package with Step-Thru

LADDER CAGE
WARNING! EXTENSION D‑RING
080087

Ladder extension rails are not self supporting and LADDER

EXTENSION RAIL
must be supported adequately! Supports are not 080085
supplied by Brownie Systems.
28” [711 mm]
LADDER CAGE D‑RING
080024
LADDER EXTENSION
SPLICE
LADDER 080083
HORIZONTAL
ANGLE

8’ [2,438 mm]
LADDER CAGE
UPRIGHT
080025
LADDER
HORIZONTAL
ANGLE 28” [711 mm]
LADDER CAGE
DOUBLE D‑RING
080054

10’ [3,048 mm]

LADDER CAGE
UPRIGHT
080052

LADDER
HORIZONTAL
ANGLE

32” [813 mm]

LADDER CAGE D‑RING
080023
10’ [3,048 mm]
LADDER SECTION
LADDER 10021887
HORIZONTAL
ANGLE
TOWER LADDER
BRACKET
3501127

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 Tower Ladder

Tower Stacking Examples

(2) Tower Stacking Examples

10’ with platform [3,048 mm] 10’ with platform [3,048 mm]

30’ with platform [9,144 mm] 30’ with platform [9,144 mm]

70’ 70’

30’ with platform [9,144 mm] 30’ with platform [9,144 mm]

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 Tower Ladder

(2) Tower Stacking Examples

example of a tower example of a tower

having 4 sections having 5 sections

NOTE: This drawing

illustrates the correct
ladder installation. The
ladder is not installed
on the access side
where it would block
the access entrance.

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 <9> Internal Tower Platform
Overview

TOWER POST

HANDRAIL

FLOOR PLANK

VERTICAL SUPPORT
MAIN CHANNEL
SUPPORT BRACKET
END CHANNEL MAIN CHANNEL

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 Internal Tower Platform

Parts

CHANNEL
CONNECTING ANGLE
3497504
* T2 TOP MOUNTING
PLATE
MAIN CHANNEL
3497509
SUPPORT BRACKET
3497503

16’ [4877 mm]

FLOOR PLANK
CONNECTOR
3497540

MAIN CHANNEL

END CHANNEL

MID CHANNEL
VERTICAL SUPPORT
3497872

FLOOR PLANK

Tower Sizes
8’ x 10’ 12’ x 16’
8’ [2438 mm] X 10’ 12’ [3658 mm] X 14’
[2438 mm] [3048 mm] [3048 mm] [3658 mm] [4267 mm] [4267 mm] 16’ [4267 mm]
Platform Package P/Ns 4508000 4508005 4508001 4508002 4508006 4508003 4508004
Part Listing

Main Channel 3497510 3497511 3497511 3497512 3497514 3497513 3497514

End Channel 3497515 3497515 3497516 3497517 3497517 3497518 3497519
Mid Channel 3497520 3497520 3497521 3497522 3497522 3497523 3497524
Floor Plank G1921161-1 G1921162-1 G1921162-1 G1921163-1 G1921165-1 G1921164-1 G1921165-1

*theThis plate is used instead of vertical support (3497872) when the tower platform is installed at
top of a T2 Tower.

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 Internal Tower Platform

Hardware

+ HANDRAIL POST SUPPORT CHANNEL

G3497600

Internal Tower Platform Hardware Packages (Quantities)

8’ [2,438 mm] 10’ [3,048 mm] 12’ [3,658 mm] 14’ [4,267 mm] 16’ [4,267 mm]
Platform Hardware Packages P/Ns 4508010 4508011 4508012 4508013 4508014
018922, 1/2”x1-1/2” hhcs bolt 60 76 76 76 76
028002, 5/16” flanged hex nut 60 113 134 160 315
068819, 3/8”x2-1/2” hhcs bolt 8 8 17 17 17
Hardware (& P/Ns)

1929023, 1-1/2”x1/2” sq. cap 4 4 4 4 4

651426, 1/2” g8 hex nut 60 76 76 76 76
90000031, 3/8”x1” hhcs bolt 4 4 8 8 8
90000091, 3/8”x3-1/2” hhcs bolt 8 8 8 8 8
90000160, 5/16”x2-1/2” carr. bolt 60 113 134 160 252
90005021, 3/8” hex nut 21 21 34 34 34
90010021, 3/8” lock washer 21 21 34 34 34
90010041, 1/2” lock washer 60 76 76 76 76
068825, 5/16”X1” carr. bolt - - - - 63
+ G3497600, handrail post supt. 4 4 8 8 8

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 Internal Tower Platform

Assembly

1 The platform height can be adjusted in

approximately 4” [102 mm] increments.
Determine the finished floor height you wish The example shows 10’ [3048 mm] and
to achieve. Note the minimum and maximum 20’ [6096 mm] tower post mountings.
dimensions from the base plate connection.

20’ [6,096 mm]

TOWER POST
MOUNTINGS
MAIN CHANNEL
SUPPORT BRACKET
VERTICAL SUPPORT 3497503
(3497872)

20’ TOWER POST

MAIN CHANNEL

10’ [3,048 mm]

TOWER POST
MOUNTINGS

10’ tower post

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 Internal Tower Platform

2
Bolt the vertical support (3497872) to the base
plate connection using the standard connection
bolts provided with the tower (5/8” x 2 1/2”).
The vertical support may stand on the bottom
plate or be suspended from the top plate.

MAIN CHANNEL

MAIN CHANNEL
SUPPORT BRACKET
3497503

(3497872)

TOWER POST

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 Internal Tower Platform

3
Bolt the main channel support bracket (3497503)
to the vertical support using 1/2” x 1 1/2”
hardware. Be certain to position the brackets
properly to achieve the finished floor height
that was designated. Note the direction of the
brackets in the example on the previous page.

VERTICAL SUPPORT
SUSPENDED
3497872

TOWER POST

MAIN CHANNEL
SUPPORT BRACKET
3497503

TOP MOUNT option TOP MOUNT option

assembled

VERTICAL SUPPORT
3497872

MAIN CHANNEL
SUPPORT BRACKET
3497503

1/2” x 1 1/2”
HEX BOLT,
LOCK WASHER,
and NUT

BOTTOM MOUNT option BOTTOM MOUNT option

assembled

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 Internal Tower Platform

4
Note: the vertical supports must be placed on
the tower post plates as shown below. The
vertical supports mounted on 20 ft [6,096 mm]
tower posts will only line up with (2) of the (4)
holes on the post connection plate.

TOWER POST MAIN CHANNEL VERTICAL SUPPORT

SUPPORT BRACKET 3497872
3497503

On 20’ [6,096 mm] tall tower posts, the

vertical platform support does not line up
with all (4) holes in the tower mounting
plate. Only (2) holes will line up.

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 Internal Tower Platform

5
Bolt the main channel to the main channel
support bracket using 1/2” x 1 1/2” hardware.

MAIN CHANNEL

VERTICAL SUPPORT
3497872

MAIN CHANNEL
SUPPORT BRACKET
3497503 TOWER POST

TOP MOUNT option

BOTTOM MOUNT option

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 Internal Tower Platform

6
Bolt the channel connecting angle to the end
and mid channel using 1/2” x 1 1/2” hardware.

MID CHANNEL

END CHANNEL

CHANNEL
CONNECTING ANGLE

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 Internal Tower Platform

7
Determine which leg option will best suit the
application. Once channel sub-assemblies
are complete, bolt them to each of the (2) main
channels using 1/2” x 1 1/2” hardware.
Position the channels matching the direction as
shown in the example below.

ELEVATOR LEGS

2’ 6” 2’ 8 3/4” 2’ 3 1/4” 2’ 8 3/4” 2’ 6”

2’ 6” 2’ 8 3/4” 2’ 3 1/4” 2’ 8 3/4” 2’ 6” 2’ 6” 4’ 3 1/4” 2’ 6”
1’ 8 3/4” 1’ 8 3/4”

MAIN CHANNEL
MID CHANNEL

END CHANNEL CHANNEL

CONNECTING ANGLE

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 Internal Tower Platform

8
Bolt the planks to the end and mid channels using
5/16” x 2 1/2” carriage bolts and hardware. See
the example on previous page. Planks will have
approximately 1/8” [38 mm] gap between them.

NOTE: Place bolts in the locations “A” on each plank.

FLOOR PLANK

MAIN CHANNEL planks bolted to end and mid channels END CHANNEL
FLOOR PLANK
using 5/16” x 2 1/2” carriage bolts

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 Internal Tower Platform

16’ [4,877 mm] Platform Only

Splice together the floor planks for the
16’ [4,878 mm] platform using the floor plank
connector.

16’ [4878 mm] FLOOR PLANK

G1921165-1 5/16” x 1” CARRIAGE BOLTS
(2 planks / length of platform) 90000160

5/16” FLANGED NUTS

028002 16’ [4878 mm] FLOOR PLANK
CONNECTOR
3497540

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 Internal Tower Platform

9
Bolt the handrail post support channel to the
main or end channel using 3/8” hardware.
See the example below for support and post
placement at this location.

HANDRAIL POST SUPPORT CHANNEL,

bolt to MAIN CHANNEL and POST

3/8” X 2-1/2”
BOLT
068819
MAIN or END
3/8” x 1” BOLT
CHANNEL
90000031
3/8” HEX NUT
90005021

FLOOR PLANKS

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 Internal Tower Platform

8’ [2,438 mm] Tower

10
Bolt the handrail “H” assemblies to the end channel
using 3/8 x 2 1/2” hardware. Bolt the side handrail
to the “H” handrail using 3/8” x 3 1/2” hardware.

78 3/4”
3/8” x 3-1/2” [2,000 mm]
HEX BOLT, 90000091
and NUT, 90005021
X
HANDRAIL “H”
4508100
X

All locations “X”

X X

MAIN CHANNEL
3497510
[1,953 mm]
76 7/8”

END CHANNEL
3497515

HANDRAIL
4508101

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 Internal Tower Platform

10’ [3,048 mm] Tower

11
Bolt the handrail “H” assemblies to the end channel
using 3/8 x 2 1/2” hardware. Bolt the side handrail
to the “H” handrail using 3/8” x 3 1/2” hardware.

102”
3/8” x 3-1/2” [2,591 mm]
HEX BOLT, 90000091
and NUT, 90005021
X
HANDRAIL “H”
X 4508102

All locations “X”

X X

MAIN CHANNEL
3497511
[2,534 mm]
99 3/4”

END CHANNEL
3497516

HANDRAIL
4508103

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 Internal Tower Platform

12’ [3,658 mm] Tower

12
Bolt the handrail “H” assemblies to the end
channel using 3/8 x 2 1/2” hardware. Bolt
the “T” handrail to the end channel at the
post using 3/8 x 2 1/2” hardware and to the
“H” handrail using 3/8” x 3 1/2” hardware.

All locations “X”

125 17/32”
3/8” x 3-1/2” [3,188 mm]
HEX BOLT, 90000091
and NUT, 90005021 X
HANDRAIL “H”
X 4508104

All locations “X”

X X

MAIN CHANNEL
3497512
[3,137 mm]
123 1/2”

END CHANNEL
3497517

HANDRAIL
4508105

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 Internal Tower Platform

14’ [4,267 mm] Tower

13
Bolt the handrail “H” assemblies to the end
channel using 3/8 x 2 1/2” hardware. Bolt
the “T” handrail to the end channel at the
post using 3/8 x 2 1/2” hardware and to the
“H” handrail using 3/8” x 3 1/2” hardware.

150”
3/8” x 3-1/2” [3,810 mm]
HEX BOLT, 90000091
and NUT, 90005021 X
X
HANDRAIL “H”
All locations “X” 4508106

X X

MAIN CHANNEL
3497513
[3,750 mm]
147 5/8”

END CHANNEL
3497518

HANDRAIL
4508107

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 Internal Tower Platform

16’ [4,877 mm] Tower

14
Bolt the handrail “H” assemblies to the end
channel using 3/8 x 2 1/2” hardware. Bolt
the “T” handrail to the end channel at the
post using 3/8 x 2 1/2” hardware and to the
“H” handrail using 3/8” x 3 1/2” hardware.

147”
[3,734 mm]
3/8” x 3-1/2”
HEX BOLT 90000091 X
and NUT 90005021
X
HANDRAIL “H”
4508108
All locations “X”

X X

MAIN CHANNEL
3497514
[4,359 mm]
171 5/8”

END CHANNEL
3497519

HANDRAIL
4508109

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 Internal Tower Platform

15
Field modifications may be required to the floor
planks to allow elevator legs through. When
walk surface is modified, additional toe boards
and handrails will need to be added around
new opening. These materials need to be
provided by the builder.

ELEVATOR LEG

4” [102 mm]

Angle toe board around perimeter

of leg opening standing at least
4” [102 mm] above walking surface.

TOE BOARD

MAIN CHANNEL

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 Appendix

Parts List

NOTE: Brownie parts are typically either galvanized

or non-galvanized (powder coated). Brownie part
numbers for equivalent galvanized parts have a part
number with the prefix “G”. Non-galvanized parts
do not have a part number with the prefix “G”. (e.g.
The following (2) parts are the same except for the
part coating: G3000149 = galvanized, and 3000149 =
non‑galvanized.)

Tower Basic Sections Hardware

Part Number Description Part Number Description Part Number Description
<1> 90000191 1” x 4” GRADE 8 HEX BOLT 90010057 1” LOCK WASHER 90005056 1” HEX NUT
<2> 90000190 7/8” X 2 1/2” GRADE 8 HEX BOLT 90010054 7/8” LOCK WASHER 90005064 7/8” HEX NUT
<3A> 90000250 5/8” X 2 1/2” GRADE 8 HEX BOLT 90010047 5/8” LOCK WASHER 90005047 5/8” HEX NUT
<3B> 90000260 7/16” X 6” GRADE 2 HEX BOLT 90010047 5/8” LOCK WASHER 90005047 5/8” HEX NUT
<4> 90000175 5/8” X 7” GRADE 2 HEX BOLT 90010030 7/16” LOCK WASHER 1714682 7/16” HEX NUT

Diagonals, 4’ x 10’ Tall Sections Horizontals, 4’

brace holes, brace holes,
center to center distance = 111 25/32” [2,839 mm] center to center distance = 31 1/8” [791 mm]
Part Number Description Part Number Description
3000149 DIAGONAL, STAGE 0, 1 3000200 HORIZONTAL, STAGE 1
3988320 DIAGONAL, STAGE 2 3000210 HORIZONTAL, STAGE 2, 3
3988330 DIAGONAL, STAGE 3 3000318 HORIZONTAL, STAGE 4
3000269 DIAGONAL, STAGE 4 3000425 HORIZONTAL, STAGE 5, 6
3000374 DIAGONAL, STAGE 5, 6 3988337 MID HORIZONTAL, STAGE 4, 5, 6

Diagonals, 6’ x 10’ Tall Sections Horizontals, 6’

brace holes, brace holes,
center to center distance = 121 9/16” [3,088 mm] center to center distance = 55 1/8” [1,400 mm]
Part Number Description Part Number Description
3000156 DIAGONAL, STAGE 0, 1 3000201 HORIZONTAL, STAGE 1
3988370 DIAGONAL, STAGE 2 3000211 HORIZONTAL, STAGE 2, 3
3988380 DIAGONAL, STAGE 3 3000319 HORIZONTAL, STAGE 4
3000276 DIAGONAL, STAGE 4 3000426 HORIZONTAL, STAGE 5, 6
3000381 DIAGONAL, STAGE 5, 6 3988384 MID HORIZONTAL, STAGE 4, 5, 6

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 Appendix / Parts List

Diagonals, 8’ x 10’ Tall Sections Horizontals, 8’

brace holes, brace holes,
center to center distance = 135 9/16” [3,443 mm] center to center distance = 80 1/8” [2,035 mm]
Part Number Description Part Number Description
3000163 DIAGONAL, STAGE 0,1 3000202 HORIZONTAL, STAGE 1
3989622 DIAGONAL, STAGE 2 3000212 HORIZONTAL, STAGE 2, 3
3989623 DIAGONAL, STAGE 3 3000320 HORIZONTAL, STAGE 4
3000283 DIAGONAL, STAGE 4 3000427 HORIZONTAL, STAGE 5, 6
3000388 DIAGONAL, STAGE 5, 6 3988434 HORIZONTAL, STAGE 4, 5, 6

Diagonals, 10’ x 10’ Tall Sections Horizontals, 10’

brace holes, brace holes,
center to center distance = 150 31/32” [3,835 mm] center to center distance = 103 1/8” [2,619 mm]
Part Number Description Part Number Description
3000170 DIAGONAL, STAGE 0, 1 3000203 HORIZONTAL, STAGE 1
3989624 DIAGONAL, STAGE 2 3000213 HORIZONTAL, STAGE 2, 3
3989625 DIAGONAL, STAGE 3 3000321 HORIZONTAL, STAGE 4
3000290 DIAGONAL, STAGE 4 3000428 HORIZONTAL, STAGE 5, 6
3000395 DIAGONAL, STAGE 5, 6 3988484 MID HORIZONTAL, STAGE 4, 5, 6

Diagonals, 12’ x 10’ Tall Sections Horizontals, 12’

brace holes, brace holes,
center to center distance = 168 29/32” [4,290 mm] center to center distance = 127 1/8” [3,229 mm]
Part Number Description Part Number Description
3000177 DIAGONAL, STAGE 0, 1 3000204 HORIZONTAL, STAGE 1
3989626 DIAGONAL, STAGE 2 3000214 HORIZONTAL, STAGE 2, 3
3989638 DIAGONAL, STAGE 3 3000322 HORIZONTAL, STAGE 4
3000297 DIAGONAL, STAGE 4 3000429 HORIZONTAL, STAGE 5, 6
3000402 DIAGONAL, STAGE 5, 6 3988534 MID HORIZONTAL, STAGE 4, 5, 6

Diagonals, 14’ x 10’ Tall Sections Horizontals, 14’

brace holes, brace holes,
center to center distance = 188 3/16” [4,780 mm] center to center distance = 151 1/8” [3,839 mm]
Part Number Description Part Number Description
3000184 DIAGONAL, STAGE 0, 1 3000205 HORIZONTAL, STAGE 0, 1, 2, 3, 4
3988252 DIAGONAL, STAGE 2, 3 3000430 HORIZONTAL, STAGE 5, 6
3000304 DIAGONAL, STAGE 4 3988260 MID HORIZONTAL, STAGE 4, 5, 6
3000409 DIAGONAL, STAGE 5, 6

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 Appendix / Parts List

Diagonals, 16’ x 10’ Tall Sections Horizontals, 16’

brace holes, brace holes,
center to center distance = 208 15/32” [5,295 mm] center to center distance = 175 1/8” [4,448 mm]
Part Number Description Part Number Description
3000191 DIAGONAL, STAGE 0, 1 3000206 HORIZONTAL, STAGE 0, 1, 2, 3, 4
3988621 DIAGONAL, STAGE 2, 3 3000431 HORIZONTAL, STAGE 5, 6
3000311 DIAGONAL, STAGE 4 3988641 MID HORIZONTAL, STAGE 4, 5, 6
3000416 DIAGONAL, STAGE 5, 6

Posts, 10’ Tall, 4 Post Tower Ladder Horizontal Angles

Part Number Description Part Number Description
3000000 POST, STAGE 0 (4 EAR) 3501128 ANGLE, 4’ [1,219 mm] TOWER SIDE
3000010 POST, STAGE 1 (4 EAR) 3501149 ANGLE, 6’ [1,829 mm] TOWER SIDE
3000020 POST, STAGE 2 (4 EAR) 3501150 ANGLE, 8’ [2,438 mm] TOWER SIDE
3000030 POST, STAGE 3 (4 EAR) 3501151 ANGLE, 10’ [3,048 mm] TOWER SIDE
3000070 POST, STAGE 3A (4 EAR) 3501152 ANGLE, 12’ [3,658 mm] TOWER SIDE
3000040 POST, STAGE 4 (6 EAR) 3501153 ANGLE, 14’ [4,267 mm] TOWER SIDE
3000050 POST, STAGE 5 (6 EAR) 3501154 ANGLE, 16’ [4,877 mm] TOWER SIDE
3000060 POST, STAGE 6 (6 EAR)

Posts, 20’ Tall, 4 Post Tower Ladder Mid Angles

Part Number Description Part Number Description
3000007 POST, STAGE 0 (6 EAR) ANGLE, 4’ [1,219 mm] TOWER SIDE
3000017 POST, STAGE 1 ANGLE, 6’ [1,829 mm] TOWER SIDE
3000027 POST, STAGE 2 3501136 ANGLE, 8’ [2,438 mm] TOWER SIDE
3000037 POST, STAGE 3 ANGLE, 10’ [3,048 mm] TOWER SIDE
3000077 POST, STAGE 3A ANGLE, 12’ [3,658 mm] TOWER SIDE
3000047 POST, STAGE 4 ANGLE, 14’ [4,267 mm] TOWER SIDE
3000057 POST, STAGE 5 ANGLE, 16’ [4,877 mm] TOWER SIDE
3000067 POST, STAGE 6

2’ Tower Sides, 10’ Tall Ladder Parts

Part Number Description Part Number Description
3000500 2’ TOWER SIDE, STAGE 0 088026 4’ [1,219 mm] LADDER SECTION
3000510 2’ TOWER SIDE, STAGE 1 10021889 5’ [1,524 mm] LADDER SECTION
3000520 2’ TOWER SIDE, STAGE 2 088027 8’ [2,438 mm] LADDER SECTION
3000530 2’ TOWER SIDE, STAGE 3 088029 LADDER SPLICE
3000570 2’ TOWER SIDE, STAGE 3A
3000540 2’ TOWER SIDE, STAGE 4
3000550 2’ TOWER SIDE, STAGE 5
3000560 2’ TOWER SIDE, STAGE 6

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 Appendix / Index

Index
Numbers assemble access braces 43

2’ tower sides 120 assemble each tower section 30

4 basic safety rules 14 assembly 8, 9, 30

6 - post tower pre-assembly 57 auxiliary equipment 10, 11, 17

6 - post tower sections 57 auxiliary equipment safety 9

8’ tower internal platform handrails 112

B
10’ tower internal platform handrails 113
base dimensions - 6 post towers 58
10’ tower ladder package with platform 89
base dimensions - T2 towers 19
10’ tower ladder package with step-thru 94
base section access braces 46
12’ tower internal platform handrails 114
base section foundation connection 31
14’ tower internal platform handrails 115
basic sections 37
15’ tower ladder package with platform 90
be alert 2
16’ platform only 110
bolt head identification 15
16’ tower internal platform handrails 116
bolt torque values 15
20’ section, stage 0 - 3 41
bottom horizontal 56
20’ tower ladder package with platform 91
braces identification 26
20’ tower ladder package with step-thru 95
Brownie Systems contact information 128
20’ tower posts 41, 120
bucket elevator 34, 35, 36
25’ tower ladder package with platform 92
bucket elevator legs 32, 34, 35, 36, 43, 108, 117
30’ tower ladder package with platform 93
builder 3, 12, 117
30’ tower ladder package with step-thru 96
building codes 11, 17, 18

A
access braces 42, 43, 44, 45, 46, 47, 48, 49,

50, 51, 52, 55, 56, 98

access braces installation 52

accessories 8, 9, 11, 13, 15, 17

access sections 42, 43, 45, 46, 48, 50, 52, 56

access sections required information 42

access sections, stage 4 - 6 47, 48, 49, 56

anchoring 13, 17, 18, 20

anchor rod diameter and strength 18

anchor rods 18, 20

ANSI 9, 10

appendix 118

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 Appendix / Index

C double “Z” access section, stage 0 - 3 42

caulking 16 double “Z” access section, stage 4 - 6 50

cautions 9 drain-out hole 16

channel connecting angles 100, 107, 108 D-ring half 80, 85, 89, 90, 91, 92, 93

climbing 10, 12, 14

E
climbing equipment 10
electrical equipment 9, 12
codes 11, 17, 18
electrician 9
component stage and identification 23
engineer 13, 17, 18
compression per post 17
engineering loads 9, 11, 13, 17, 31, 34
concrete 17, 18
equipment installation 9, 10, 11, 12, 13, 15, 17, 32
concrete quality 17

construction 2, 3, 8, 9, 10, 11, 13, 15, 20,

F
22, 23, 31, 34, 73
fabricating foundation plates 18
construction personnel 2
factory internal lateral cross braces 32, 33
construction problems 34
fall protection equipment 10
contents 4
field drill drain-out hole 16
contractors 11, 13
flared D-ring 80
corner landing 60, 61, 63, 65, 66, 67
floor plank connectors - 16’ platforms only 100, 110
corner landing assembly 65
foundation 13, 17, 18, 19, 20, 21, 30, 31, 36,
crane 16, 34, 36
46, 54, 56, 57, 58
crane lifts 11
foundation considerations 17, 18, 19, 20, 21, 58

foundation construction 20
D
foundation design 19, 58
diagonal access braces 53
foundation, example drawing 20
diagonal and horizontal brace assembly 30
foundation notes 17
diagonals 22, 23, 26, 27, 28, 30, 31, 36, 37,
foundation, overhead view 21
38, 39, 40, 43, 46, 52, 53, 54, 55, 57
foundation plan 19
diagonals, 4’ x 10’ tall sections 118
foundation plates 17, 18, 20, 31, 36, 54, 57
diagonals, 6’ x 10’ tall sections 118

diagonals, 8’ x 10’ tall sections 119

G
diagonals, 10’ x 10’ tall sections 119
galvanized-hot-dipped towers 16
diagonals, 12’ x 10’ tall sections 119
galvanized - hot dipped towers drain-out hole 16
diagonals, 14’ x 10’ tall sections 119
general safety requirements 8
diagonals, 16’ x 10’ tall sections 120
general safety statement 3
double-access sections 42, 52
grain leg tower internal lateral cross braces, top view 35
double-access sections, stage 0 - 3 52
guards 9, 10
double D-ring 80, 90, 91, 93, 94, 95, 96

double “Z” access braces 42, 43, 45, 50, 51, 52, 56

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 Appendix / Index

H internal tower platform assembly 102

handrail post support channel 101, 111 internal tower platform hardware 101

hardware 12, 15, 36, 37, 38, 39, 40, 41, 55, internal tower platform parts 100

56, 62, 63, 65, 67, 78, 101, 118 internal tower platforms 11, 13, 15, 99

hazards 3
K
heights 2, 12, 73, 88
kicker braces 63, 65, 68, 70, 81, 82, 84
horizontal access braces 43, 44, 52, 53, 55, 56

horizontals 22, 26, 27, 28, 30, 36, 37, 38, 39,
L
40, 43, 44, 54, 55, 56, 57, 74, 77
ladder base clips 86
horizontals, 4’ 118
ladder brackets 76, 77
horizontals, 6’ 118
ladder cage connector strap 89, 90, 91, 92, 93
horizontals, 8’ 119
ladder cage double D-ring 80
horizontals, 10’ 119
ladder cage D-ring 78, 80, 95
horizontals, 12’ 119
ladder cage D-ring half 80, 85
horizontals, 14’ 119
ladder cage extension D-ring 94, 95, 96
horizontals, 16’ sections 120
ladder cage flared D-ring 80

ladder cage uprights 78, 80, 85

I
ladder clip and bolt 76, 77
inspection 8
ladder connection assembly 79
install access braces 56
ladder extension rails 87, 94, 95, 96
install corner landing handrails 66
ladder extension splice 87
install switchback landing handrails 69
ladder horizontal angles 74, 75, 76, 77, 83, 84,
internal cross brace plate 33
89, 90, 91, 92, 93, 94, 95, 96, 120
internal cross braces installation 32, 33
ladder landing support braces 84
internal lateral cross braces 32, 33, 36
ladder landing toe boards 85, 86
internal platform end channel 99, 100, 107, 108, 109,
ladder mid angles 74, 75, 76, 77, 120
111, 112, 113, 115
ladder parts 120
internal platform end channels 114, 116
ladders 8, 11, 12, 13, 14, 15, 73, 77, 78, 79,
internal platform floor planks 99, 109, 100, 110, 117
85, 86, 87, 88, 120
internal platform handrails 99, 111, 112, 113, 114,
ladder sections 76, 78, 79, 88
115, 116
ladder splice 79
internal platform main channels 99, 100, 102, 103, 108,
ladder stacking drawings 88
109, 111, 112, 113, 114, 115, 116, 117
ladder step - thru 87
internal platform main channel support bracket 100, 103
landing platforms 61, 63, 65, 67, 70, 72, 73, 81,
internal platform mid channel 100, 107, 108
85, 88
internal platform toe boards 117
Life Saving Equipment 10
internal platform vertical supports 99, 100, 102, 103,
lifts 11
104, 105, 106

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 Appendix / Index

M proper personnel 8

main channel support bracket 99, 100, 103, 104,

R
105, 106
rebar 17, 20
mid diagonals 55
regular D-ring 95
mid horizontals 22, 28, 39, 40, 45, 47, 48, 50,
reinforcing plates 26
54, 55, 57, 118, 119, 120
required pre-assembly 22
minimum foundation connection 18
required top plate installation 16

N
S
NIOSH 9
safety 2, 3, 8, 9, 10, 11, 12, 13, 14

O safety cables 11

operating safety 14 safety cages 11, 12, 78

operator 2, 3, 12 safety compliance 8

operator qualifications 10 safety decals 9

OSHA 10, 12, 73, 88 safety questions or concerns 10

OSHA, ANSI, NIOSH 9 scaffolds 11

OSHA occupational safety and health act of 1970 9 secondary safety devices 14

OSHA regulations 9, 10, 11, 12, 73, 78, 88 shields 9, 10

other important operating safety concerns 14 short diagonals 45, 46

owner 2, 3, 11, 12, 13, 19, 58 single access assembly, stage 4, 5, and 6 55

single access diagonal 44

P single access horizontal 44
parts list 118 single access sections, stage 0 - 3 44
Personal Protective Equipment 10 single Z access brace 46, 47
personnel 2, 3, 8, 14, 21 single Z access sections, stage 0 - 3 46
plastic square caps 64, 86 single Z access sections, stage 4 - 6 48
platform base to post connection plate 83 site design 13, 19, 58
platform cage uprights 85 site soil conditions 13
platforms 8, 9, 11, 12, 13, 14, 15, 61, 63, soil conditions 13, 17, 18
65, 67, 70, 81, 99 some typical example braces 28
post connection plate dimensions 29 stacking onto a 4 - 6 base section 54
post connection plates 16, 20, 29, 31, 32, 34, 35, stack tower stages onto the base stage 36
36, 58, 81, 82, 83, 105 stage 0 - 3 access sections 43
post dimensions, all sections 29 stage 0 - 3 posts and stage 0 - 4 braces 37
posts identification 24 stage 3 adapter posts, stage 0 - 4 braces 38
power 10 stage 4 - 6 base section foundation connection 54
precautions 2, 3, 43, 46 stage 4 - 6 posts, stage 0 - 4 braces 39

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 stage 4 - 6 tower sections 54 tower post base plate 21

stage 4 - 6 Z access brace 49 tower posts 20, 22, 23, 24, 25, 29, 30, 33, 37,

stage 5 - 6 posts, stage 5 - 6 braces 40 38, 39, 40, 41, 57, 58, 82, 83, 84, 103,

stairs 13, 15, 17, 21, 36, 72 104, 106

stairs assembly 64 tower posts, 10’ tall 120

stair section 62 tower posts, 20’ tall 120

stairway resting pad 21 tower section assembly, stage 4, 5, and 6 55

standard D-ring 80 tower short diagonal 46

starter stair section 61, 62, 72 tower stacking examples 97, 98

structural loads 9, 11, 17, 31, 34 tower staging layout 13, 22, 23, 25

supervisor 3, 12 tower staging layout example 22

switchback landing 60, 61, 63, 67 tower stairs 64

switchback landing assembly 67 tower stairs handrails 63, 64

tower stairs kicker 63

T tower stairs landings weights 60
T2 top mounting plate 100
tower stairs sections weights 60
T2 tower diagonal identification 27
tower stairs to landing connection 72
T2 tower horizontal identification 27
tower stairs vertical brace 63
T2 tower post identification 25
tower stairway 60
top landing 61, 63, 70
tower stairway parts 62, 63
top landing handrails 71
tower stairway specifications 60
top plates 16
tower top landing assembly 70
tower access braces See access braces tower top plates 16
tower basic sections hardware 118 tower with stage 4 - 6 assembly 54
tower braces 26, 28, 30, 31 typical ladder cage parts layout 80
tower diagonals See diagonals

tower horizontals See horizontals V

tower internal post 57 vertical support brace 65, 67, 68, 70, 81, 82, 84

tower ladder 73

tower ladder bracket 76, 89

tower ladder end bracket 76

tower ladder landing 81

tower ladder landing handrails 85

tower landing base 81, 85

tower landing kickers 84

tower mid diagonals See mid diagonals

tower mid horizontals See mid horizontals

tower platforms See platforms

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W Z
warranty 6, 11 “Z” access braces 43, 45, 46, 47, 48, 49, 56

weld dots 25 “Z” access sections 45

welding 13, 17, 20, 21, 31, 34, 35, 36, 42, 43, “Z” diagonal access braces 45, 46, 47, 48, 50

46, 47, 48, 49, 51, 52, 53, 54, 56, 65, 67 “Z” horizontal access braces 45, 46, 48, 50

wind loads 9, 11, 13, 31, 34, 43, 46

wind / weather 2, 10, 46

work area and equipment safety 10

work area safety statement 8

2015-05-19 GLOBAL INDUSTRIES, INC. 126 T2 Towers 4000037

Recent Significant Manual Changes:
2011-07-29 Rev. 02 Changes
1 Page 56. Text changes were made.

2011-08-15 Rev. 03 Changes

1 Pages 2, 10, 16, and 118. Text changes were made.

2015-04-17 Rev. 04 Changes

1 Pages 2, 8, 26, 50, 54, 60, 74, 75, 87, 88, and 120. Text changes were made.

2 Pages 4 - 5. The table of contents was updated.

3 Pages 8 - 14. The safety information was updated.

4 Page 42. A drawing change was made.
5 Pages 121 - 126. The index was remade.
6 Tower braces names were commonized throughout the manual.
7 Manuals harmonization changes were made throughout the manual.
8 Other minor changes were made throughout the manual.

2015-05-19 Rev. 05 Changes

1 Pages 62 and 120. Text changes were made.

2015-07-01 Rev. 06 Changes

1 Page 56. Text changes were made.

2015-05-19 GLOBAL INDUSTRIES, INC. 127 T2 Towers 4000037

 www.globalindinc.com • www.go-brownie.com

MANUFACTURED BY

BROWNIE SYSTEMS
A Unit of GLOBAL Industries, Inc.

P. O. Box 2105 • 2928 East Highway 30

Grand Island, Nebraska 68802 - 2105, USA
TEL: 800-228-4285
FAX: 308-382-6954

© 2015 Global Industries, Inc. All rights reserved.