INSTALLATION INSTRUCTIONS

SERIES ET350
STRIP WINDOW SYSTEM

Phone: (800) 262-5151 • Fax: (866) 262-3299

crlaurence.com • usalum.com • crl-arch.com

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SERIES ET350 STRIP WINDOW SYSTEM

HANDLING, STORAGE, AND PROTECTION

OF ALUMINUM
The following precautions are recommended to protect the material against damage. Following these precautions will help
ensure early acceptance of your products and workmanship.

A. HANDLE CAREFULLY.
All aluminum materials at job site must be stored in a safe place, well removed from possible damage by other trades.
Cardboard wrapped or paper interleaved materials must be kept dry.

B. CHECK ARRIVING MATERIALS.

Check for quantities and keep records of where various materials are stored.

C. KEEP MATERIALS AWAY FROM WATER, MUD, AND SPRAY.

Prevent cement, plaster or other materials from damaging the finish.

D. PROTECT THE MATERIALS AFTER ERECTION.

Protect erected frame with polyethylene or canvas splatter screen. Cement, plaster, terrazzo, other alkaline solutions,
and acid based materials used to clean masonry are harmful to the finish. If any of these materials come in contact
with the aluminum, IMMEDIATELY remove with water and mild soap.

The rapidly changing technology within the architectural aluminum products industry demands that C.R. Laurence/U.S. Aluminum reserve the
right to revise, discontinue, or change any product line, specification, or electronic media without prior written notice.

NOTE: Dimensions in parentheses ( ) are millimeters unless otherwise noted.

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SERIES ET350 STRIP WINDOW SYSTEM

GENERAL INSTALLATION NOTES

Recommended guidelines for all installations:
1. REVIEW CONTRACT DOCUMENTS. Check shop drawings, installation instructions, architectural drawings, and shipping
lists to become thoroughly familiar with the project. The shop drawings take precedence and include specific details for the
project. Note any field verified notes on the shop drawings prior to installing. The installation instructions are of a general
nature and cover most conditions.

2. INSTALLATION. All materials are to be installed plumb, level, and true.

3. BENCH MARKS. All work should start from bench marks and/or column lines as established by the architectural drawings
and the general contractor with guaranteed accuracy. Working from these datum points and lines determine:
a) The plane of the wall in reference to offset lines provided on each floor.
b) The finish floor lines in reference to bench marks on the outer building columns.
c) Mullion spacing from both ends of masonry opening to prevent dimensional build-up of daylight opening.

4. FIELD WELDING. All field welding must be adequately shielded to avoid any splatter on glass or aluminum. Results will be
unsightly and/or structurally unsound. Advise general contractor and other trades accordingly. All field welds of steel anchors
must receive touch-up paint (zinc chromate) to avoid rust.

5. SURROUNDING CONDITIONS. Make certain that construction which will receive your materials is in accordance with the
contract documents. lf not, notify the general contractor in writing and resolve differences before proceeding with work.

6. ISOLATION OF ALUMINUM. Aluminum to be placed in direct contact with uncured masonry or incompatible materials
should be isolated with a heavy coat of zinc chromate or bituminous paint.

7. SEALANTS. Sealants must be compatible with all materials with which they have contact, including other sealant surfaces.
Consult with sealant manufacturer for recommendations relative to joint size, shelf life, compatibility, cleaning/priming,
tooling, adhesion, etc. It is the responsibility of the Glazing Contractor to submit a statement from the sealant manufacturer
indicating that glass and glazing materials have been tested for compatibility and adhesion with glazing sealants, and
interpreting test results relative to material performance, including recommendations for primers and substrate preparation
required to obtain adhesion. The chemical compatibility of all glazing materials and framing sealants with each other and
with like materials used in glass fabrication must be established. This is required on every project.

8. FASTENING. Within the body of these instructions "fastening" means any method of securing one part to another or to
adjacent materials. Only those fasteners used within the system are specified in these instructions. Due to the varying
perimeter conditions and performance requirements, perimeter and anchor fasteners are not specified in these instructions.
For perimeter and anchor fasteners refer to the shop drawings or consult the fastener supplier.

9. BUILDING CODES. Due to the diversity in state/provincial, local, and federal laws and codes that govern the design and
application of architectural products, it is the responsibility of the individual, architect, owner, and installer to assure that
products selected for use on projects comply with all the applicable building codes and laws. U.S. Aluminum exercises no
control over the use or application of its products, glazing materials, and operating hardware and assumes no responsibility
thereof.

10. EXPANSION JOlNTS. Expansion joints and perimeter seals shown in these instructions and in the shop drawings are
shown at normal size. Actual dimensions may vary due to perimeter conditions and/or difference in metal temperature
between the time of fabrication and the time of installation. Gap between expansion members should be based on
temperature at time of installation.

11. WATER HOSE TEST. As soon as a representative amount of the wall has been glazed (500 square feet or 46.5 m2) a water
hose test should be conducted in accordance with AAMA 501.2 specifications to check the installation. On all jobs the hose
test should be repeated every 500 square feet (46.5 m2) during the glazing operation.

12. COORDINATION WITH OTHER TRADES. Coordinate with the general contractor any sequence with other trades which
offset curtain wall installation (i.e. fire proofing, back-up walls, partitions, ceilings, mechanical ducts, converters, etc.)

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SERIES ET350 STRIP WINDOW SYSTEM

13. CARE AND MAINTENANCE. Final cleaning of exposed aluminum surfaces should be done in accordance with AAMA
609.1 for anodized aluminum and 610.1 for painted aluminum.

14. SEALANTS. Check shop drawings, installation instructions, architectural drawings and shipping lists to become thoroughly
familiar with all sealants referenced in these instructions, which must be a one part elastomeric silicone and must be applied
according to the silicone manufacturer’s recommendations.

15. APPLICATION. Structural silicone must be applied from the interior and weatherseal from the exterior after the interior
structural silicone has fully cured.

16. MAXIMUM ALLOWABLE STRESS ON SILICONE. The maximum allowable size of the glass light is controlled by the width
and depth of the silicone joint combined with the specified design windload (PSF or Pa). The stress on the structural silicone
must not exceed 20 PSI (137 KPa) for a 6:1 safety factor. Check Structural Silicone Chart in the Architectural Design Manual
for this product series.

17. ARCHITECT. It is the responsibility of the architect to secure approval of the system and request from the glazing
contractor the compatibility and adhesion test reports described bellow.

18. GLAZING CONTRACTOR. It is the responsibility of the glazing contractor to submit a statement from the sealant
manufacturer indicating that glass and glazing materials have been tested for compatibility and adhesion with glazing
sealants and interpreting test results relative to material performance, including recommendations for primers and substrate
preparation required to obtain adhesion. The chemical compatibility of all glazing materials and framing sealants with each
other, and with like materials used in glass fabrication, must be established. This is required on every project.

19. U.S. ALUMINUM. It is the responsibility of U.S. Aluminum to supply a system to meet the architect’s specifications.

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SERIES ET350 STRIP WINDOW SYSTEM

FRAME FABRICATION
Measure ROUGH OPENING to determine FRAME DIMENSION allowing 1/4" (6.4) minimum for shimming
and caulking around perimeter.

1. Measure rough opening to determine frame width and height dimension.

2. Cut members to size:

Head and Sills : D.L.O. plus 1-1/2" (38.1)

Intermediate Horizontals : D.L.O. plus 1-1/2" (38.1)
Jambs and Verticals : R.O. minus Head and Sill caulk space
Horizontal Glass Stops : D.L.O. plus 1/16" (1.6)
Vertical Glass Stops : D.L.O. plus 1-7/16" (36.5)
Subsill Flashing : Horizontal Frame Dimension plus 1/16" (1.6)

Frame Width
Head
D.L.O.

Horizontal
Glass Stops
D.L.O.

Jamb
Frame Height

Intermediate
Horizontal
Intermediate
Vertical
Vertical
Glass Stops

Sill

Subsill

DETAIL A

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SERIES ET350 STRIP WINDOW SYSTEM

SUBSILL PREPARATION

3. Apply End Dam to end of subsill. (See DETAIL B)

NOTE:
Clean all surfaces prior to applying sealants.
See sealant manufacturer requirements.
TYPICAL AT ALL CONDITIONS.

Apply RTV408 Silicone

to exterior contact areas

EC350
End Dam

Carefully seal around

joints and over screw
tips with RTV408 Silicone.

EC350
End Dam

(2) ST206
#8 x 1/2" PHSMS

DETAIL B

NOT TO SCALE

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SERIES ET350 STRIP WINDOW SYSTEM

INTERMEDIATE LOCATION
4. Mark intermediate horizontal centerlines. Place a mark 3/8" (9.5) above centerline mark for drill
jig alignment. (See DETAIL C)

ES351

ET350

Mark for drill

jig alignment

3/8"
(9.5)

DETAIL C

NOT TO SCALE

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SERIES ET350 STRIP WINDOW SYSTEM

DRILLING INSTALLATION HOLES

5. Drill for head, sill, and intermediate horizontals. Use of drill jig is recommended.
Drill (4) .201 dia. holes for #7 drill (#10 screws). (See DETAIL D)

DJ156 ALIGN WITH

DJ156
TOP EDGE

This side out at This side out

ET350 Vertical at ES351 Filler

Lay-out Mark Lay-out Mark

This side out This side out

at ET350 Vertical at ES351 Filler

DJ155 DJ155

ET350 ES351
MULLION FILLER

2-3/8"
(60.3) 11/32"
(8.7)

11/16" 15/32"
(17.4) (11.9)
1-11/16"
(42.8)

5/8"
(15.9)
1-3/8"
(35) 3/4" ET353
(19.1)

5/32"
D.L.O

(5.6)

1/4"
(6.4)
3/4" (19.1)

2-1/4" 5/8"
(57.2) (15.9)

3/4" (19.1) ET354

D.L.O

11/32"
(8.7)
15/32"
(11.9)
3/4" (19.1) ET353
1-3/8"
(35)
5/8"
(15.9)

DETAIL D
NOTE: Drill jigs are handed depending on which side of vertical mullion assembly is being prepped.
Refer to instructions on drill jigs. NOT TO SCALE

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SERIES ET350 STRIP WINDOW SYSTEM

FRAME ASSEMBLY
NOTE: Always check overall dimension every 3 to 4 bays to monitor cutting tolerances.

1. Frames are fabricated with one main mullion and one mullion filler per unit except for jamb units.
Plan units accordingly.

2. Starting with the first bay of the elevation having a jamb member, clean and apply silicone to
inside of vertical glazing fin where horizontal fins will overlap. Clean and apply silicone to ends of
horizontal members. (See DETAIL E)

Apply RTV408 Silicone

to ends before assembly

ET350

ET354

ES351
ET350 DETAIL E
DETAIL E

Seal Ends

3. Attach horizontals to verticals using screws provided. (See DETAIL F)

4. Tool excess sealant around overlapping fins and contact edges.

DETAIL F

NOTE: Application and tooling of CRL RTV408 Silicone at end dams is CRITICAL to prevent water penetration.
NOT TO SCALE

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SERIES ET350 STRIP WINDOW SYSTEM

FRAME ASSEMBLY CONTINUED

5. After each bay is assembled, seal underside of sill member at intersections to
vertical mullions along full depth of sill member. (See DETAIL G)

NOTE:
This is a critical seal.

Seal underside of
ET353 sill with
RTV408 Silicone

DETAIL G

6. Continue frame assembly until last bay is complete. (See DETAIL G)

NOTE: Care should be taken while transporting frames to ensure framing does not rack, which
may break seals.

FRAME INSTALLATION
NOTE: When entrances occur, install Entrance Frame first.

1. Set subsill in place, shimmed as required for leveling, and anchor it to structure. Locate fasteners
6" (152.4) to each side of verticals and 24" (609.6) O.C. or as required. Holes for fasteners should be
elongated laterally to allow for thermal movement. Pin subsill to structure at one point only per cut length.
(This hole is not elongated). Subsill should be shimmed at location of fasteners and underneath verticals.
Seal around all joints and over head of fasteners. (See DETAIL H).

Seal over head of fasteners

Elongated holes to allow
for thermal movement

Diameter of fastener
expansion joint size

Diameter of fastener
plus 1/16" (1.6)

Elongated hole
Prefab weep slots occur
size formula
24" (609.6) O.C.

NOTE: The equivalent to two

weep holes per light are required. Shim at fasteners location
and at loading points
DETAIL H to keep subsill level
NOT TO SCALE

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SERIES ET350 STRIP WINDOW SYSTEM

SEALING THE SUBSILL AND SPLICE SLEEVES

2. Splice subsill as required. Splice sleeves are required at splice joints. Locate splice sleeves near center of
D.L.O. (See DETAIL I).

Splice Sleeve

Seal full length of splice Apply bond breaker tape to subsill ET358
and splice sleeve over full length of joint,
then seal over it.

NOTE:
This is a critical seal.
A minimum 1/2" (12.7)
expansion joint is required
every 24' (7.3 m)
To avoid three sided adhesion
apply bond breaker tape to outside
of sleeve before installation.
SECTION A – A

DETAIL I

3. Apply silicone to the end dam contact area. (See DETAIL J) Set first panel inside subsill and slide it into place.

NOTE: Use a temporary shim to push end dam tight against wall jamb. Remove temporary shim after installation
is completed and before sealing around perimeter.

Butter contact area ET352

with RTV408 Silicone

NOTE: Use a temporary shim ET358

to keep end dam tight against
wall jamb. Remove shim before
sealing perimeter.
ET353 Shim at anchor point

DETAIL J
NOT TO SCALE

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SERIES ET350 STRIP WINDOW SYSTEM

PANEL INSTALLATION
Seal inside and
outside joints

ET353
ET353

Do not plug weep slots ET358

ET358
when sealing perimeter.

DETAIL K
NOTE: Panels must be pushed
Tremco 'SPECTREM 1', tight against subsill inside upturned
a low modulus, high performance, one leg before fastening head and
part silicone (or similar), is recommended caulking sill.

4. Panel must be pushed against the upturned back wall on the subsill. (See DETAIL K) Plumb and shim unit and
fasten it to structure. Locate header fasteners 3" (76.2) to each side of verticals and no more than 24" (609.6) O.C.
Secure wall jamb through glass pocket if required to limit deflection. Always shim at anchor points.

5. Place adjacent panel into opening. Anchor in place, making sure vertical halves are tightly joined.
Repeat procedure until last bay is in place.

6. After frames are assembled, fill void in corner joints of glass pocket area as shown. (See DETAIL L)

ES351

ET352 ET350

DETAIL L
7. Apply and tool perimeter sealant around framing.
NOT TO SCALE

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SERIES ET350 STRIP WINDOW SYSTEM

GLAZING
GLASS SIZES

ES350 SYSTEM = Daylight Opening (D.L.O.) + 1" (25.4).

NOTE: This formula does not take into account glass tolerance.
Consult glass manufacturer before ordering glass.

1. Cut interior wedge gasket to size. Gaskets should be 1/8" (3.2) longer per foot of
aluminum member to allow for shrinkage.

2. Place setting blocks at quarter points or as instructed by shop drawings.

3. Clean glazing fins with solvent prior to applying glazing tape.

NOTE: Two thickness of glazing tape are used.

GT304 = 3/16" (4.8) x 1/8" (3.2) at horizontals.
GT407 = 1/4" (6.4) x 1/2" (12.7) at verticals.
Glazing tape must be pre-shimmed to prevent
over compression.

4. Apply horizontal tape to full length of horizontal members, flush with top of fin. Apply vertical tape,
butting tight to horizontal tape, leaving an extra amount at each end to ensure a tight joint. (See DETAIL M)

NOTE: With extra amount [approximately 1/8" (3.2)] of tape at

each end, press end against horizontal tape leaving excess
material as shown, then press excess into place.

ET353

DETAIL M

NOT TO SCALE

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SERIES ET350 STRIP WINDOW SYSTEM

GLAZING (CONTINUED)

ET353

ET350

NOTE: Apply small joint sealant

on all exposed sides of tape
intersection joint.

ES351

DETAIL N

5. Immediately prior to glazing unit, peel protective paper from glazing tape. DO NOT TOUCH exposed tape surfaces
with fingers or any tool. Seal tape intersections with small joint sealant. (See DETAIL N).

6. Before setting glass, clean all areas of glass with solvent where contact with glazing tape will occur. It is important that
these cleaned areas are not touched or contaminated by foreign matter to ensure a proper seal.

7. Install glass onto setting blocks. Before setting glass against tape, check for proper glass bite at vertical members.
Push glass firmly onto glazing tape. Apply glazing stops and wedge gaskets.

NOTE: Glass must not be pulled away from tape once contact is made. If this occurs, tape must be replaced and glass
must be re-cleaned.

NOT TO SCALE

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SERIES ET350 STRIP WINDOW SYSTEM

ALUMINUM
GUIDE TO SEALANTS
NOTE: All sealants must be tooled to ensure proper adhesion.
WATERPROOFING EXPANSION
• 33S ACETIC CURE SILICONE • 95C SILICONE BUILDING SEALANT
Sill to Subsill, End Dams, Screw Heads, and Expansion Joints.
Threshold to Door Frame Sealing. Ex
pa
ns
Seal Over Screw Heads io
n
D
CAT. NO. 33S Bond Breaker Tape ire
ct
io
CAT. NO. 827T n
W
LO
P BE
)GA
mm
2.7
” (1
1/2

Fill with Sealant to

Create a Water Shed. Seal Tape Edges
CAT. NO. 33S CAT. NO. 95C
Seal Gap Seal Over Screw Heads in
NOTE: Not for use near insulating glass units CAT. NO. 95C Slotted (Expansion) Holes.
with butyl sealant. CAT. NO. 95C

JOINT ADHESIVE PERIMETER

• RTV408 NEUTRAL CURE SILICONE • 95C SILICONE BUILDING SEALANT
Small Joints, End Joints and Buttered Surfaces, (Preferred)
Water Diverters, End Dams, and Reglet Fills. • M64 (SMOOTH) MODIFIED
POLYURETHANE
• M66 (TEXTURED) MODIFIED
Fill Screw Reglet Ends POLYURETHANE
with CAT. NO. RTV408
Perimeter Seals, Expansion Joints, Sill and
Threshold Beds, Concrete, Wood, and Steel
Openings.

Exterior Perimeter Caulking

CAT. NO. 95C/M64/M66
Butter Ends Before Assembly
CAT. NO. RTV408

Exterior Perimeter Caulking

CAT. NO. 95C/M64/M66
Seal Vertical Gasket Reglet
CAT. NO. RTV408

Waterproofing Silicone Sealant Do Not Block Weep Holes

Seal Over Screw Heads CAT. NO. 33S/RTV408
CAT. NO. RTV408

STRUCTURAL
Seal Water Diverter • ALL STRUCTURAL SEALANTS
CAT. NO. RTV408 REQUIRE TESTING AND APPROVAL.
NOTE: I.G. butyl contact OK. Glass-to-Glass or Glass-to-Metal

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