ALTO M.D.

TOWERS
STAIRWELL TOWER REVIS
EDITI ED
ASSEMBLY GUIDE TO BS-EN 1004-2004
ON2
Using the 3T (Through the Trap) Assembly method

1 RUNG
GUARDRAIL FRAME
3094

GUARDRAIL
3 RUNG MAIN BRACE FRAME
FRAME 3096
3092

TOE BOARD
SIDE CLIP IN
3087 LADDER
3091

TRAP PLATFORM
TOE BOARD 3086
END
3088

HORIZONTAL BRACE
3510

WALK THROUGH ALSO

FRAME
3090 3 RUNG
LADDER
FRAME
3093
DIAGONAL BRACE
FRAME FOOT ASSEMBLY 3512
3089 2 RUNG
GUARDRAIL
FRAME
3095

Distributed by:-
Lakeside Industries Ltd
Unit 19 Howard Road
Redditch
Worcestershire
B98 7SE
01527 500577
www.lakeside-industries.co.uk
INSTRUCTIONS FOR BUILDING BASIC 1-2m STAIRWELL TOWER
2B

2A

2. Position the frame with the foot assembly on

the higher location on the staircase making sure 3. Fit the opposite ends of the braces to the
1. Thesee towers should be erected by at least 2 that the frame head fitting always points toward other walkthrough frame with foot assembly
competent persons. Fit an adjustable foot the middle of the tower (2B). Fit 2 short fitted. The braces would normally attach just
assembly into a walk through base frame horizontal braces to vertical tubes of the frame above the frame top rung. Ensure that the pegs
ensuring that the spring loaded pins engage in just above lowest rung ensuring spring loaded on the frame head fittings point towards the
the holes provided (1A). pin faces outward (2A). middle of the tower.

5. Add a 3 rung frame on to the lower walk 6. Fit guardrail brace frame between the two
4. Fit two long braces diagonally between the through base frame by locating onto head fitting frames with the hooks attached just above the
bottom rungs of each frame. At this stage level with peg engaging into hole provided. Repeat the top two rungs ensuring spring loaded pins face
the tower by adjusting the collars on the foot process at the other end using a 1 rung guardrail outward (see detail 2A). Repeat on the other side
assemblies (see construction notes). frame. of the tower.

8. Locate the clip-in-

ladder on the higher
walkthrough base frame
using the hooks at the top
ng
to locate over the top rung
of the frame. The locatingg
lugs on the lower part of
the ladder should rest
7. Fit the trap platform so that it is 1m (2 full against the inner sides
rung spacings) below the top rung of the tower of the frame opening so that 9. Fit the toeboards around the platform. Always
with the trap against the frame higher up the the ladder presses against the frame as it is remember to close the trapdoor immediately
stairs climbed (always climb the tower on the inside). after climbing through.
SAFETY NOTES 11. Never work from, or build or dismantle the tower 6. Fit the first two horizontal braces to the
1. Before erecting check ground is level unobstructed and
from, an unguarded platform. vertical frame tube. This prevents the frame from
is suitable for the purpose. Also ensure area is clear of
12. If used externally beware of high winds. Tie in if falling over during erection and
overhead obstructions, particularly power cables.
necessary regardless of working height. Secure dismantling.
2. Check that the tower is stable before use.
platforms against lifting. 7. All diagonal braces are fitted as close as
3. Do not attempt to move a loaded tower.
13. Legislation now calls for inspection and recording possible to the upright.
4. Always climb the tower from the inside.
of assembled towers. See HSE guidance note 10
5. Do not overload the tower. Maximum platformloads 8. Observe all height limits and fit stabilisers to
(revision 4) for further details.
130 kg (2kN/m2)). Maximum horizontal force at increase the safe working height to the tower.
platform 30kg.
Towers may also be tied to a suitable rigid struc-
6. Never remove components from a tower whilst it is
erected. Dismantling must always be performed from
CONSTRUCTION NOTES ture using standard scaffolding tubes and fittings
1. Follow the erection manual to ensure that (see tying in). Fittings connected to the tower
the top. Failure to observe this rule will seriously
the correct erection procedure is used. should not be over tightened as this could distort
reduce the strength and safety of the tower.
the aluminium tube.
7. Do not use damaged components. Check all compo- 2. Ensure that sufficient equipment is available to
nents before use and periodically lubricate all moving construct the tower and is in working order. 9. Fit toeboards to all working platforms and ensure
parts and wipe off surplus oil. that all platforms are adequately guarded.
3. Do not extend frame foot jacks more than is
8. Secure the tower when left unattended. 10. The dismantling sequence is the reverse order of
necessary to level the tower.
9. Do not lean ladders against towers or use ladders on the erection process.
top of platforms. 4. Use a Spirit level to check that the tower is
upright. 11. For special or unusual applications contact your
10. At heights where components cannot be passed up or
supplier for further technical data sheets and
down by hand, a rope should be used for securing to 5. The peg on the head fitting must always point expert advice
components to aid safe raising and lowering. inwards
INSTRUCTIONS FOR BUILDING BASIC 1.5/2.5m STAIRWELL TOWER
Follow steps 1-4 of the basic stairwell assembly instructions opposite

5. Fit a 3 rung frame on to the lower walk

through base frame by locating onto head fitting 7. Using the temporary platform, fit a single rung
with peg engaging into hold provided. Repeat the 6. Now fit a temporary platform, guardrail brace guardrail frame onto the 3 rung frame by
process at the other end using a 2 rung guardrail frames & ladder as shown in steps 6, 7 & 8 locating onto head fitting with peg engaging into
frame. opposite. hold provided.

9. Fit the clip-in-ladder, then the working

8. Remove the temporary platform & guardrail platform on the 3rd rung down from the top.
brace frames. Fit a long brace diagonally Using the 3T method, fit the guardrail brace
between the top rungs of each walkthrough frames as shown in step 6 opposite. Now, fit the
frames. toeboard as shown in step 9 opposite.

INSTRUCTIONS FOR BUILDING STAIRWELL TOWERS 2m/3m IN HEIGHT AND ABOVE

To build towers higher than 2m/3ms follow the same procedures as above using 3 rung and 3 rung ladder frames to gain height and then top off using frames as
shown in the schematic diagrams overleaf. However please note the following: Always work from a guardrailed platform while building. When building, fit a trap
platform above you and, working through the trapdoor of this platform, install guardrails at 0.5m and 1.0m above platforms. It may be necessary to relocate platforms
during assembly to achieve this.

REST PLATFORMS WARNING!

Rest platforms must be fitted every 2m and

WARNING: never work from or build, or
consist of a trap platform, and guardrails at 0.5m When tower is left unattended remove clip-in
dismantle the tower from an unguarded
and 1m as shown. Remember to always close ladder & toeboard to allow emergency access
platform
trapdoor immediately after climbing through. Nb. through the tower. This can be further assisted by
see safety note on back page. opening the trap door on the platform.
 COMPONENT SCHEDULE
ALTO STAIRWELL TOWERS WITH PLATFORM HEIGHTS FROM 1m/2m TO 5m/6m
CONFORMING TO HD1004 WHERE RELEVANT
INTERNAL USE ONLY

PLATFORM HEIGHT 1.0/2.0m 1.5/2.5m 2.0/3.0m 2.5/3.5m 3.0/4.0m 3.5/4.5m 4.0/5.0m 4.5/5.5m 5.0/6.0

DESCRIPTION CODE WEIGHT Kg

Frame Foot Assembly 3089 3.8 2 2 2 2 2 2 2 2 2

Walk Through Frame 3090 4.7 2 2 2 2 2 2 2 2 2

3 Rung Main Frame 3092 4.1 1 1 1 2 2 2 3 3 3

3 Rung Ladder Frame 3093 6.2 0 0 1 1 1 2 2 2 3

2 Rung Guard Rail Frame 3095 2.4 0 1 1 0 1 1 0 1 1

1 Rung Guard Rail Frame 3094 1.6 1 1 0 1 1 0 1 1 0

Clip in Ladder 3091 3.5 1 1 1 1 1 1 1 1 1

Trap Platform 3086 9.8 1 1 1 2 2 2 2 2 3

Horizontal Brace 3510 1.5 2 2 4 6 8 8 8 8 12

Diagonal Brace 3512 1.8 2 3 4 4 5 5 6 6 7

Guardrail Brace Frame 3096 3.4 2 2 2 2 2 2 2 2 2

Stabilisers 3516 3.9 0 4 4 4 4 4 4 4 4

Toe Board Side 3087 2.0 2 2 2 2 2 2 2 2 2

Toe Board End 3088 1.5 2 2 2 2 2 2 2 2 2

TOTAL SELF WEIGHT OF TOWER KGs 56 76 86 102 109 111 119 121 143

MAXIMUM NUMBER OF WORKING LEVELS 1 1 1 1 2 2 2 2 3

NOTES: A WORKING LEVEL ON A TOWER IS A PLATFORM WITH TOEBOARDS & DOUBLE GUARDRAILS.THE MAXIMUM LOAD ON A 600 mm WIDE PLATFORM IS 2kN/m2 WHICH IS:-
130 kgs EVENLY DISTRIBUTED ON A PLATFORM.
THE MAXIMUM LOAD ON A TOWER (INCLUDING THE SELF WEIGHT OF THE TOWER) SHOULD NOT EXCEED 750kgs (3/4 TONNE).THE MAXIMUM HORIZONTAL FORCE WHEN USING HAND TOOLS ETC. SHOULD
NOT EXCEED 30 kgs & STABILISERS MUST BE FITTED
THE ABOVE SCHEDULE INCLUDES FOR: (i) 1 WORKING LEVEL WITH DOUBLE TOEBOARDS & DOUBLE HANDRAILS AT 0.5m.
(ii) A SINGLE TRAP PLATFORM & HANDRAILS AT 0.5m INSIDE & OUT AS REST PLATFORMS EVERY 2 m.
TO CONVERT A REST PLATFORM TO A WORKING LEVEL: ADD 1 - TOEBOARD SET

ALTO STAIRWELL TOWER BRACE GUIDE

BRACE TYPE CODE COLOUR I.D. LENGTH

Horizontal Brace 3510 Red 1.20 m

Diagonal Brace 3512 Silver 1.56 m

SCHEMATIC DIAGRAM TOWERS 2/3m – 5.0/6.0m

2RF
1RF 3RLF
2RF tb
KEY: WTF - Walk Through Frame h - Horizontal Brace tb - Toeboard
1RF
3RF - 3 Rung Frame d - Diagonal Brace tb P
d1
3RF h2
2RF - 2 Rung Frame P - Platform 3RF
P P 3RLF
2RF tb d1
1RF - 1 Rung Frame 1rf 3RLF d1 3RLF 3RF
P 3RLF
3RLF - 3 Rung Ladder Frame 2rf tb d1 h2 h2
1RF h2
tb P
3RF
3RF 3RF d1 3RF d1 3RF d1 3RF d1
3RLF P
2RF tb
3RLF h2 3RLF h2 h2 3RLF 3RLF
3RLF 3RLF
tb
P d1 P P
P d1 d1 d1 d1 d1 d1
d1 h2
h2 h2 h2 h2 h2 h2
3RF 3RF 3RF 3RF 3RF 3RF
3RF P P
d1
d1 d1 WTF d1 WTF d1 d1 WTF d1 WTF
WTF WTF WTF
h2
h2 h2 h2 h2 h2 h2
d2
WTF WTF d2 WTF d2 WTF d2 WTF d2 WTF d2
WTF d2

2.0/3.0m 2.5/3.5m 3.0/4.0m 3.5/4.5m 4.0/5.0m 4.5/5.5m 5.0/6.0m