Lakeside Industries alto MD 250 User manual
ALTO MEDIUM DUTY
MD 250 DOUBLE WIDTH TOWER
Mobile Aluminium Access Tower
ISSUE 3
Instruction Manual BS EN 1004-2:2021-EN
The ALTO MD 250 Tower is certied to BS EN 1004-1:2020
3T - Through The Trapdoor Method
Lakeside Industries Ltd
www.altoaccess.com
Page 2ALTO MD 250 Double Width Tower |Assembly Guide
Introduction
Please read these instructions carefully and ensure that you fully understand all of the information
contained herein. All of the information in this document is vital for the safe utilisation of your Alto
MD 250 Tower, which is designed primarily for the safe execution of tasks such as construction and
maintenance work at platform heights of between 3m and 12m.
All Alto Access products are professional quality engineered equipment designed primarily with safety
in mind and meet or exceed all standards, recommendations and guidelines. Used properly, Alto access
equipment will keep you safe when working at height.
This manual contains all of the information necessary to correctly assemble your Alto MD 250 mobile
access tower and incorporates all of the requirements of the PASMA 3T method of assembly as endorsed
by the HSE.
This manual should be used in conjunction with your Risk Assessment and Method Statement and in
line with the Work at Height Regulations 2005 which place an obligation on employers to eliminate or
minimise risks. This manual must be made available to the user/assembler at all pertinent times.
Only competent and qualified personnel should undertake erection, dismantling or alteration, organisation,
planning or supervision of mobile access towers. In the case of any doubt, sufficient relevant additional
training must be given beforehand to ensure safe use. For further information on the use of mobile
access towers consult PASMA (www.pasma.co.uk; Tel +44 (0) 845 230 4041). For any additional technical
information or specific advice please contact the manufacturer Lakeside Industries Limited Tel: +44 1527
500577 or Email: [email protected].
Certifications
The Alto MD 250 Tower is a mobile access tower certified to BS EN 1004-1:2020 Load Class 3. If the
application is outside the scope of BS EN 1004-1:2020, reference should be made to BS 1139-6:2022
to ensure that the configuration of the equipment meets the relevant requirements. This tower is
manufactured in our ISO 9001 accredited facility. This manual complies with BS EN 1004-2:2021.
Maximum Safe Working Loads
The safe working load of the tower is 2,000kg including its own weight. The maximum safe working load
of any individual platform is 282 kg evenly distributed. The maximum number of persons permitted on a
platform unit within a working platform is two.
Page 3ALTO Access Products |Lakeside Industries Ltd
The maximum permitted horizontal force at the working platform for a freestanding Alto MD 250 tower
is 30kg. It is a requirement of BS EN 1004-1:2020 that a tower may only have one working platform at a
time. If the tower is to be used in an application outside the scope of BS EN 1004-1:2020, contact your
supplier or the manufacturer, Lakeside Industries Limited, for advice on loadings. Tel: +44 1527 500577
or Email: [email protected].
Inspection Care & Maintenance
Alto Access equipment is designed and manufactured to the highest standards in the industry and is
stronger, more robust and safer than any comparable competitor product. Properly cared for, it will give
a long and productive service life.
The equipment should be inspected and maintained by a competent person as outlined in the “Alto MD
Tower Inspection Procedures”. A free downloadable copy is available at www.altoaccess.com/downloads.
· Equipment should always be inspected before and after each use.
· Whilst Alto Access equipment is extremely robust, care should be exercised in loading, transporting
and handling components to avoid damage or injury to either the equipment or persons.
· Never use any equipment which is damaged, has parts missing or is improperly assembled.
· Repairs should only be carried out by Lakeside Industries Limited or their authorised repairers.
· In case of any doubt as to the integrity of any items of Alto Access equipment, the part should be
withdrawn from use, quarantined and subject to detailed examination to determine whether repair
or replacement is required. If returned to the factory, Lakeside Industries Limited will provide a free
of charge evaluation of any damaged components.
Safety
This instruction manual shall be available on the location of use of the mobile access and working
tower. This mobile access and working tower shall only be used according to this manual without any
modification. Mobile access and working towers must only be used in accordance with national regulations.
The permissible configurations of the tower are set out in the tables of components on pages 14 and 15
below. These set out the permitted heights and the required components.
Check that all of the necessary components and equipment for the particular tower configuration to be
built are on site, undamaged and functioning correctly. Damaged or incorrect components shall not be
used. Only the original Alto Access Products components specified in this manual shall be used.
Page 4ALTO MD 250 Double Width Tower |Assembly Guide
Always consider the correct platform height in relation to the required working height and the task to be
carried out when selecting and assembling a tower. Before assembling the tower, the location should be
checked to identify and eliminate hazards during assembly, alteration and dismantling. In particular:
· Check that the surface on which the tower is to be located is capable of supporting the tower and
its payload. Check that the level and slope of the ground do not render the location unsafe for the
purposes of assembling, using and dismantling the tower.
· The place in which the tower is to be assembled and deployed should be segregated from the rest
of the site using appropriate barriers and warning signs. This is to reduce or eliminate the risk of
unauthorised persons walking close to or under the tower and of vehicles or plant colliding with the
tower.
· Beware obstructions when assembling, altering and dismantling the tower.
· When working outdoors, the weather forecast shall be taken into account before assembly, use and
dismantling.
· Beware live electrical installations, cables, moving machinery or other obstructions when erecting,
dismantling or using the tower. The tower is a conductive metallic structure.
· The safe working load of the tower is 2,000kg including its own weight. The maximum safe working
load of any individual platform is 282 kg evenly distributed.
· This product shall only be used according to the instruction manual.
· User training courses cannot be a substitute for instruction manuals but only complement them.
· If the tower is to be used in an application outside the scope of BS EN 1004-1:2020, contact your
supplier or the manufacturer, Lakeside Industries Limited, for advice on loadings. Tel: +44 1527
500577 or Email: [email protected].
· Towers must always be climbed from the inside using the built in ladders only. Do not climb the
outside of the tower. If the work carried out from the tower requires frequent carrying of equipment
and materials up or down the tower, an Alto stair tower should be used in preference to a ladderspan
tower.
· The tower must be levelled to within an inclination of 1% when erected using the adjustable jack or
castor legs.
· Two or more persons are required for the safe erection and dismantling of a tower.
· Appropriate PPE and a spirit level are required for the safe erection and dismantling of a tower.
· Always comply with the Work at Height Regulations 2005 when erecting, dismantling & using the
tower.
· When lifting components, always use reliable lifting equipment and fastening methods and always lift
from within the footprint of the tower structure to prevent risk of the tower overturning.
Page 5ALTO Access Products |Lakeside Industries Ltd
· Users must be aware of the effects of horizontal and vertical loads on the structure when using the
tower which may impair the stability of the tower. Examples would be loads resulting from work on
an adjacent structure or wind loads which may be increased by tunnelling effects around adjacent
buildings.
· See “Moving the Tower” below for safety guidelines affecting the relocation of the tower.
· The maximum permitted horizontal force at the working platform for a freestanding Alto MD 250
tower is 30kg.
· Do not use boxes, ladders or other items to gain additional height.
· Do not stand on guard rails for any reason.
· If the tower is to be used in connection with hoisting arrangements, this is outside the scope of
BS EN 1004-1:2020 and requires specific advice from the manufacturer to ensure safety. Contact
the manufacturer Lakeside Industries Limited for advice on loadings Tel: +44 1527 500577 or Email:
· Mobile access and working towers designed in accordance with EN 1004-1 are not anchor points
for personal fall arrest equipment unless they are specifically designed in accordance with relevant
European standards by the manufacturer for that purpose.
· Fit guard rails to all platforms and ensure all wind latches are engaged at both ends of all platforms.
· Stabilisers shall always be fitted when specified.
· Working is only permitted on a platform with complete side protection including guardrails and
toeboards.
· The distance between platforms shall not exceed 2.25m.
· Mobile access towers in accordance with EN 1004-1 are not designed to be sheeted. Sheeting massively
increases wind loads on the structure.
· If sheeting is to be attached, contact the manufacturer Lakeside Industries Limited for advice on
loadings Tel: +44 1527 500577 or Email: [email protected].
· Mobile access towers in accordance with EN 1004-1 are not designed to be lifted or suspended. If a
tower is to be lifted or suspended, contact the manufacturer Lakeside Industries Limited for advice
on loadings Tel: +44 1527 500577 or Email: [email protected]
· Mobile access towers in accordance with EN 1004-1 are not designed to be used as a means of edge
protection.
· Mobile access towers in accordance with EN 1004-1 are not designed to be used as a means to enter
or exit other structures, e.g. as a stair tower. If a tower is to be used as a means to enter or exit other
structures, contact the manufacturer Lakeside Industries Limited for advice on loadings Tel: +44 1527
500577 or Email: [email protected].
Page 6ALTO MD 250 Double Width Tower |Assembly Guide
· Every erected tower must be inspected by a competent person at least every seven days and any
tower which has been left unattended should be inspected before use to ensure that:
1. No components have been removed or relocated incorrectly;
2. The castors are locked by the brakes
3. The tower is still vertical; and
4. No environmental or other factors have arisen which will influence safe use of the tower.
Alto Access Products recommends the use of the PASMA TowerSure inspection system. For more
information, please visit: pasma.co.uk/towersure.
Unattended Towers
To prevent use by unauthorised persons of complete or incomplete towers when unattended, steps should
be taken to prevent unauthorised access. Appropriate steps may include some or all of the following:
· Use of scaffold alarms.
· Suitable physical means such as barriers or site fencing to prevent access to the area immediately
· around the tower.
· Warning signs identifying the areas where access is not permitted should be displayed at the access
· points to area occupied by the tower.
· Attaching a well-designed and correctly fitted ladder guard to the lowest levels of the tower.
· Appropriate site security.
· Unattended towers should be tied in to a rigid structure.
· Towers which have been left unattended should be inspected before use as outlined above.
Moving The Tower
Always assess the risks before moving any tower. If there is any doubt as to the safety of the move, the
tower must be dismantled before moving. Before moving the tower, its overall height should be reduced
to 4m working platform height or less. No persons, tools, equipment or materials shall be permitted to
remain on the tower when it is being moved.
The tower should only be moved by manually pushing it by the lowest frames at no more than walking
speed. When moving the tower users are to be particularly careful of the following:
Page 7ALTO Access Products |Lakeside Industries Ltd
· Obstructions, including overhead obstacles, moving machinery or electrical cables and equipment.
· Not to move the tower in wind speeds of 18mph (force 5) or above.
· The effect of rough, uneven or sloping ground on the stability of the tower. Towers may only be
moved on flat and solid ground without obstacles having a maximum slope of 3%.
· Only to raise the stabilisers by no more than 25mm.
· Locking and unlocking the castors using the foot pedal to allow and prevent the tower moving at
appropriate times.
After completing the movement and before every use of the tower the following checks should be carried
out as a minimum:
· Ensure that the tower is vertical within an inclination of 1% by using the adjustable jack or castor legs
and safely supported on an appropriate surface.
· Check that the tower is correct and complete including the presence and positioning of stabilisers.
· Stabilisers must be positioned in accordance with the manual. Ensure that the couplers are fully
tightened to give a reliable grip on the tower frame. Ensure that the stabilisers press firmly against
the ground.
· Check that no environmental changes have occurred which influence or affect safe use of the tower.
Wind Speeds
Persons using or responsible for towers must beware of the effect of wind on the structure. Wherever
possible, as a precaution, it is advisable to tie the tower in to a rigid structure if it is to be used where it is
exposed to potential windy conditions. Users should beware the potential tunnelling effect of open ended
or unclad buildings and narrow openings between buildings. We recommend that the use of the tower is
discontinued in conditions where the wind speed is above 17mph (force 4).
WIND
DESCRIPTION
BEAUFORT
SCALE
AVERAGE
SPEED INFORMATION
Medium Breeze 4 13-17 mph Safe to work on tower.
Strong Breeze 6 25-31 mph Tie the tower to a solid structure. Do not work on tower.
Gale Force 8 39-46 mph Towers must be dismantled. Towers must not be assembled.
Page 8ALTO MD 250 Double Width Tower |Assembly Guide
Erecting & Dismantling the Tower
All Alto towers must be built and dismantled in accordance with the step by step instructions in the
following pages corresponding to the particular tower configuration involved and having regard to the
Work at Height Regulations 2005; PUWER and Health & Safety legislation as appropriate.
3T Method Explained
The “3T” or “through the trapdoor” method is one of the two permitted ways of assembling a tower
without the assembler being at risk of falling. This tower is a 3T tower.
Step 1:
As each new level of platform is installed, the operative
takes up a working position in the trap door of the
platform, standing on the ladder and leaning back
against the edge of the trapdoor aperture.
Step 2:
From this position, the operative fits the horizontal
braces 500mm and 1000 mm above the platform level
(i.e. on the 2nd and 4th rungs above the platform). If
the far end of the guardrail braces don’t fully engage
when they are put in place, the operative fully engages
it when first climbing up onto the platform. This process
ensures that operatives never have to stand on an
unguarded platform.
Page 9ALTO Access Products |Lakeside Industries Ltd
Frames
Braces
Stabilisers
Stabilisers should always be attached to the tower so as to maximise the base area of the tower structure.
The correct size stabilisers must always be used – see component schedule for details.
Stabilisers are attached to the tower using the half couplers on the stabiliser. Once the correct positioning
of the stabilisers as outlined below has been achieved, ensure that the couplers are fully tightened to give
a reliable grip on the tower frame. Ensure that the stabilisers press firmly against the ground.
In an open area, set the stabilisers so they form a square around the tower as per the diagram below.
Diagonal braces must always be located
with the claw opening facing down.
Horizontal braces must be located with
the claw facing either down (on the rung)
or outwards (if on the upright).
All braces are fitted with spring loaded
pins that automatically lock the brace
into position when attached to a tower.
Brace hooks must be located either over
the rung screw heads, between 2 screw
heads or between the frame upright and a
screw head to prevent lateral movement.
Frames must always be assembled with
the offset conical head fitting pointing
inwards towards the centre of the tower.
Page 10 ALTO MD 250 Double Width Tower |Assembly Guide
If the tower is being used against a wall, arrange the two stabilisers nearest the wall to run parallel to the
wall and the other two stabilisers perpendicular to the tower as per the middle diagrams.
If the tower is being used in a corner, remove the one stabiliser in the corner, arrange the two stabilisers
nearest the wall to run parallel to the wall and position the final stabiliser 45 degrees to the tower as per
the bottom diagrams.
Where there is insufficient clearance to fit the specified stabilisers, contact your supplier or the
manufacturer for specific advice. Where ballast or kentledge is used, it must be of solid material, placed
on a platform on the lowest rung of the tower and secured against unauthorised removal.
1.6m DW
3.5m (upto & inc. 5.7m)
4.5m (above 5.7m)
3.5m (upto & inc. 5.7m)
4.5m (above 5.7m)
2.4m DW
3.8m (upto & inc. 6.2m)
4.8m (above 6.2m)
3.8m (upto & inc. 6.2m)
4.8m (above 6.2m)
1.6m DW
2.8m (upto & inc. 5.7m)
3.5m (above 5.7m)
4.4m (upto & inc. 5.7m)
5.8m (above 5.7m)
2.4m DW
2.8m (upto & inc. 6.2m)
3.5m (above 6.2m)
5.2m (upto & inc. 6.2m)
6.6m (above 6.2m)
1.6m DW
2.8m (upto & inc. 5.7m)
3.5m (above 5.7m)
3.0m (upto & inc. 5.7m)
3.7m (above 5.7m)
2.4m DW
2.8m (upto & inc. 6.2m)
3.5m (above 6.2m)
3.8m (upto & inc. 6.2m)
4.5m (above 6.2m)
Page 11ALTO Access Products |Lakeside Industries Ltd
Tying In
Towers must be tied into a suitable rigid structure once they go beyond the freestanding working heights
specified in BS EN 1004-1:2020 - 8m working platform height outdoors and 12m working platform height
indoors - or if the tower is unstable or is in danger of being unstable. Standard scaffold tubes and fittings
can be used with Alto Access tower products. Ties should be spaced at no more than 4m intervals. Ties
must be rigid in tension & compression and be secured to both frame uprights. For further details
regarding tying in, please contact your supplier or the manufacturer: Lakeside Industries Limited.
Signage
After assembly or alteration, the following minimum information shall be displayed on the mobile access
and working tower and be clearly visible from the ground (e.g. on a tag):
· The name and contact details of the responsible person.
· If the tower is ready for application or not.
· The load class and the uniformly distributed load.
· If the mobile access and working tower is intended for indoors use only.
· The date of assembly.
Safety Pictograms
Page 12 ALTO MD 250 Double Width Tower |Assembly Guide
Page 13ALTO Access Products |Lakeside Industries Ltd
Page 14 ALTO MD 250 Double Width Tower |Assembly Guide
MD 250 DOUBLE WIDTH TOWER TO BS EN 1004-1:2020
Using the 3T (Through The Trapdoor) assembly method
PLATFORM WORKING HEIGHT (m)
INTERNAL & EXTERNAL USE INTERNAL USE ONLY
CODE PART DESCRIPTION Wt 2.2 2.7 3.2 3.7 4.2 4.7 5.2 5.7 6.2 6.7 7.2 7.7 8.2 8.7 9.2 9.7 10.2 10.7 11.2 11.7 12.2
2239 125mm Dia. Castor Wheel 2.5 444444444444444444444
3076 MD Adj. Alum Leg (black collar) 1.3 444444444444444444444
3034 MD 1.6m D/W Toeboard 9.0 111111111111111111111
3101 MD250 D/W 8 Rung Frame 12.2 2242446466868810 810 10 12 10 12
3103 MD250 D/W 6 Rung Frame 9.32222222222
3104 MD250 D/W 4 Rung Frame 6.3 2 2 2 2 2 2 2 2 2 2 2
3015 MD 1.6m Horiz. Brace (blue) 2.0 6 8 11 11 11 12 15 15 15 16 19 19 19 20 23 23 23 24 27 27 27
3016 MD 1.6m Diag. Brace (green) 2.4 3345666888810 10 10 10 12 12 12 12 14 14
3019 MD 1.6m Plain Platform 12.5 111111111111111111111
3021 MD 1.6m Trap Platform 13.1 112222333344445555666
3023 MD Small Stabiliser 4.7 44444444
3024 MD Large Stabiliser 5.9 4444444444444
TOTAL SELF WEIGHT OF TOWER (kg) 124 134 161 171 179 187 211 223 234 242 267 278 284 292 317 328 334 342 367 378 384
BUILD METHOD A B C D A B C D A B C D A B C D A B C D A
COMPONENT SCHEDULE
1.6m Long x 1.38m Wide (Double Width) MD 250 Tower
Page 15ALTO Access Products |Lakeside Industries Ltd
COMPONENT SCHEDULE
2.4m Long x 1.38m Wide (Double Width) MD 250 Tower
MD 250 DOUBLE WIDTH TOWER TO BS EN 1004-1:2020
Using the 3T (Through The Trapdoor) assembly method
PLATFORM WORKING HEIGHT (m)
INTERNAL & EXTERNAL USE INTERNAL USE ONLY
CODE PART DESCRIPTION Wt 2.2 2.7 3.2 3.7 4.2 4.7 5.2 5.7 6.2 6.7 7.2 7.7 8.2 8.7 9.2 9.7 10.2 10.7 11.2 11.7 12.2
2239 125mm Dia. Castor Wheel 2.5 444444444444444444444
3076 MD Adj. Alum Leg (black collar) 1.3 444444444444444444444
3035 MD 2.4m D/W Toeboard 11.7 111111111111111111111
3101 MD250 D/W 8 Rung Frame 12.2 2242446466868810 810 10 12 10 12
3103 MD250 D/W 6 Rung Frame 9.32222222222
3104 MD250 D/W 4 Rung Frame 6.3 2 2 2 2 2 2 2 2 2 2 2
3017 MD 2.4m Horiz. Brace (yellow) 2.6 6 8 11 11 11 12 15 15 15 16 19 19 19 20 23 23 23 24 27 27 27
3018 MD 2.4m Diag. Brace (brown) 3.0 3345666888810 10 10 10 12 12 12 12 14 14
3020 MD 2.4m Plain Platform 17.8 111111111111111111111
3022 MD 2.4m Trap Platform 18.2 112222333344445555666
3023 MD Small Stabiliser 4.7 444444444
3024 MD Large Stabiliser 5.9 444444444444
TOTAL SELF WEIGHT OF TOWER (kg) 143 154 189 199 208 216 248 261 267 280 312 325 331 339 371 384 390 398 430 443 449
BUILD METHOD A B C D A B C D A B C D A B C D A B C D A
Page 16 ALTO MD 250 Double Width Tower |Assembly Guide
Step 1
Insert the leg & castor assembly
into the base of the rst two 8 rung
frames. When fully inserted, ensure
the spring loaded pin is engaged into
the hole in the side of the frames.
Ensure all 4 wheels have the brakes
applied.
Step 2
Connect 2 horizontal braces to the
uprights of the rst frame in the
area above the bottom rung as
shown. Make sure that the braces
are connected from the inside of
the tower facing outwards. Make
sure that the frame head ttings are
pointing inwards into the tower.
Step 3
Connect the 2nd frame to the
horizontal braces in the same
position that they are located on
the rst frames. Make sure that the
frame head ttings are pointing
inwards into the tower.
ASSEMBLY INSTRUCTIONS - All Platform Working Heights
Page 17ALTO Access Products |Lakeside Industries Ltd
Step 4
Connect 2 diagonal braces to the
frames as shown. Keep the diagonal
braces as close to the frame uprights
as possible. Ensure that they run in
opposite directions to each other.
Step 5
Install a trap platform on the 4th rung
up and 4 horizontal braces as guard
rails as shown. Clip a 5th horizontal
brace on the top rung of the frames,
on the opposite side to the guard
rails. Using a spirit level, ensure that
the framework is completely level
by adjusting the legs. Make sure the
trap platform is located to one side
of the tower as shown and the trap
lid opens outwards, not inwards.
Step 6
Once the framework is in position
and level, connect 4 stabilisers to
the corners. Fix the shorter arm
to the lowest part of the frame,
then connect the longer arm to
the upper part, ensuring the foot is
rmly placed on the ground. Small
vertical adjustments can be made
to either arm to guarantee a sturdy
placement.
Page 18 ALTO MD 250 Double Width Tower |Assembly Guide
Step 7.1
Working from the temporary
platform, install two 4 rung frames
onto the 8 rung frames. Now, clip
onto the top rungs of the frames
two diagonal braces. The lower
end of the brace connects to the
rung 6 below on the opposite face.
Diagonal braces always run parallel
to the braces below. If a 2.2m tower
is being assembled, only 1 diagonal
brace needs to be tted.
Step 7.2
Install another 4 guard rails above
the 4 already in place for when the
platform is relocated.
Step 7.3
Remove the lower 4 guardrails
by either using the 3T method or
uninstalling them from the ground.
Relocate the platform to the top rung
of the rst frames. If a 2.2m tower is
being assembled, go straight to Step
10. Install 2 more 8 rung frames and
2 more diagonal braces. The lower
hook of the brace should be on
the same rung height as the lower
guardrail brace.
Proceed to Step 9
Build Method A 2.2m, 4.2m, 6.2m, 8.2m, 10.2m, 12.2m
Page 19ALTO Access Products |Lakeside Industries Ltd
Step 7.1
Working from the temporary
platform, install two 6 rung frames
onto the 8 rung frames. Then, clip
2 diagonal braces onto the top
rungs. The other end connects to
the 6th rung below on the opposite
face. Diagonal braces always run in
a parallel direction to the diagonal
braces below. If a 2.7m tower is
being assembled, only 1 diagonal
brace needs to be tted.
Step 7.2
Relocate the platform down to
the 2nd rung up from the bottom
and relocate the 4 guardrails as
shown. Working o this, install a
2nd platform 8 rungs above the rst
and another horizontal brace in the
position shown in Blue. Ensure the
trap platforms are to one side of
the tower as shown and the trap lid
opens outwards.
Step 7.3
Using the 3T method, install 4
guardrails to the upper platform. If a
2.7m high tower is being assembled,
go straight to step 10. The platform
on the bottom rung of the tower can
now be removed. Make sure that
there are still 2 horizontal braces on
both the bottom rung and the 8th
rung up on the tower.
Proceed to Step 8
Build Method B 2.7m, 4.7m, 6.7m, 8.7m, 10.7m
Additional Brace
Page 20 ALTO MD 250 Double Width Tower |Assembly Guide
7
Step 7.1
Working from the temporary
platform, install two 8 rung frames
onto the rst set of 8 rung frames.
Then, clip 2 diagonal braces on. The
lower hook of the braces should be
on the 6th rung up (the intermediate
guardrail level) and the upper hook
connects to the 4th rung of the new
frame - running in the same parallel
direction as the diagonal brace
below.
Step 7.2
Install a 2nd platform 8 rungs above
the rst platform. Using the 3T
method install 4 guardrails to the
upper platform. Ensure the trap
platform is to one side of the tower
as shown and the trap lid opens
outwards. If a 3.2m high tower is
being assembled, go to step 10.
Proceed to Step 8
Build Method C 3.2m, 5.2m, 7.2m, 9.2m, 11.2m
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