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CLIMA 3T
Mobile Aluminium Tower with
Climbing Frame 1450/850
3T - Through the Trapdoor Method
USER GUIDE
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1 BoSS Clima 3T User Guide
Please read this user guide carefully.
Please note that diagrams are for illustrative purposes only.
User guides are also available to download from our website at
bossaccesstowers.com.
BoSS mobile aluminium towers are light-weight scaffold towers used
throughout the building and construction industry for both indoor
and outdoor access solutions where a stable and secure platform is
required. Ideal for maintenance and installation work or short-term
access, the highly versatile towers provide a strong working platform
for a variety of heights.
This user guide provides you with step by step instructions to ensure
your system is erected easily and safely, using the 3T (Through The
Trapdoor) method.
The law requires that personnel erecting, dismantling or altering
towers must be competent. Any person erecting a BoSS mobile
tower must have a copy of this user guide. For further information
on the use of mobile access and working towers consult the PASMA
operators code of practice.
If you need further information, design advice, additional user guides
or any other help with this product, please contact the manufacturer
on +44 (0)1621 745900 or email uk.customercare@wernerco.com.
Safety First
Introduction
Compliances
The BoSS Clima aluminium system has been tested and certied
to EN 1004: 2004 Class 3
User Guide EN 1298-IM-EN
Preparation and inspection
Inspect the equipment before use to ensure that it is not damaged
and that it functions properly. Damaged or incorrect components
should not be used.
Mobile Towers - 3T Method
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bossaccesstowers.com
Safety First
Safe use
● Check that all components are onsite, undamaged and that
they are functioning correctly - (refer to Checklist and Quantity
Schedules). Damaged or incorrect components should not be
used.
●
Check if the ground on which the mobile access tower is to be
erected and moved is capable of supporting the tower.
●
The safe working load is 275kgs (606lbs) per platform level,
uniformly distributed up to a maximum of 950kgs (2100lbs) per
tower (including self weight).
●
Towers must always be climbed from the inside using the built-
in ladder during assembly and use.
●
It is recommended that towers should be tied to a solid structure
when left unattended.
●
Adjustable legs should only be used for levelling.
Lifting of equipment
● Tower components should be lifted using a reliable lifting
material (e.g. strong rope) employing a reliable knot (e.g. clove
hitch) to ensure safe fastening and always lift within the footprint
of the tower.
● Assembled mobile towers should not be lifted with a crane or
other lifting devices.
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BoSS Clima 3T User Guide
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Safety First
Stabilisers/ballast
● Stabilisers or outriggers and ballast weights should always be
tted when specied.
● The Quantity Schedules show the recommended stabilisation.
In circumstances where there is restricted ground clearance for
stabilisers/outriggers, contact your supplier for advice. Ballast
must be made up of solid materials (i.e. not water or loose sand)
and should not be positioned to overload individual legs. Ballast
should be secured against accidental removal where practicable,
and be supported on the lowest rung of the bottom frame.
Movement
● The tower should only be moved by manual effort, and only from
the base.
● Beware of live electrical apparatus when moving the tower
(particularly overhead), plus wires or moving parts of machinery.
● No person or materials should be on the tower during
movement.
● Caution should be exercised when wheeling a tower over
rough, uneven or sloping ground, taking care to unlock and
lock castors. If stabilisers are tted, they should only be
lifted a maximum of 25mm above the ground to clear ground
obstructions.
● The overall height of the tower when being moved should not
exceed 2.5 times the minimum base dimensions, or 4 metres
overall height.
● Before use, check that the tower is still correct and complete.
● After every movement of the tower, use a spirit level to check
that it is vertical and level and set the adjustable legs as
required.
● Do not move the tower in wind speeds over 7.7 metres per
second (17mph).
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During use
● Beware of high winds in exposed, gusty or medium breeze
conditions. We recommend that in wind speeds over 7.7
metres per second (17mph), cease working on the tower and
do not attempt to move it. If the wind becomes a strong breeze
(expected to reach 11.3 metres per second - 25mph) tie the
tower to a rigid structure. If the wind is likely to reach gale force
(over 18 metres per second - 40mph), the tower should be
dismantled.
●
Beware of open ended buildings, which can cause a funnelling
effect.
●
Do not abuse equipment. Damaged or incorrect components
should not be used.
●
Raising and lowering components, tools, and/or materials by
rope should be conducted within the lower base. Ensure that
the safe working load of the supporting decks and the tower
structure is not exceeded.
●
The assembled tower is a working platform and should not be
used as a means of access or egress to other structures.
●
Beware of horizontal forces (e.g. power tools) which could
generate instability. Maximum horizontal force 30kg.
● The stairway towers, (featuring an inclined staircase access) are
for frequent use by personnel carrying tools and/or materials.
● Mobile towers are not designed to be suspended - please refer
to your supplier for advice.
●
Do not use boxes or stepladders or other objects on the
platform to gain extra height.
Safety First
Wind
description
Beaufort
scale
Beaufort
No.
Speed in
mph
Speed in
m/sec
Medium
Breeze
Raises dust and
loose paper,
twigs snap off
4 8-12 4-6
Strong Breeze
Large branches
in motion,
telegraph wires
whistle
6 25-31 11-14
Gale Force Walking is difcult 8 39-46 17-21
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Safety First
Ties
● Ties should be used when the tower goes beyond its safe height,
beyond the limits of the stabilisers/outriggers or if there is a
danger of instability. They should be rigid, two way ties fastened
to both uprights of the frame with load-bearing right angled or
swivel couplers. Only couplers suitable for the 50.8mm diameter
tube of the tower should be used. Ideally, ties should be secured
to both faces of a solid structure by means of anchorages.
● The tie frequency may vary depending on the application, but
they should (at a minimum) be every 4 metres in height.
● For further information on tying-in a tower please contact your
supplier or BoSS.
Maintenance - storage transport
● All components and their parts should be regularly inspected
to identify damage; particularly to joints. Lost or broken parts
should be replaced, and any tubing with indentation greater than
5mm should not be used and put to one side for manufacture
repair. Adjustable leg threads should be cleaned and lightly
lubricated to keep them free running.
● Brace claws, frame interlock clips, trapdoor latches and platform
wind-locks should be regularly checked to ensure they lock
correctly.
● Refer to the BoSS user guide for detailed inspection and
maintenance advice.
● Components should be stored with due care to prevent damage.
● Ensure components are not damaged by excessive strapping
forces when transported.
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End Toe Board
Horizontal Brace
Platform
(Fixed and
Trapdoor Decks)
Diagonal Brace
8 Rung
Frame
Castor
Adjustable Leg
4 Rung Frame
Stabiliser
Side
Toe Board
Safety First
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BoSS Clima 3T User Guide
7
Quantity Schedule
1450 width towers
IMPORTANT: Please ensure you also read the Quantity Schedule on page 8
*If you are unable to position the working platform easily from the ground, you may height. require an additional fixed platform for this tower weight
Internal or external use Internal use only
Component Working height (m)
Platform height (m)
3.2
1.2
3.7
1.7
4.2
2.2
4.7
2.7
5.2
3.2
5.7
3.7
6.2
4.2
6.7
4.7
7.2
5.2
7.7
5.7
8.2
6.2
8.7
6.7
9.2
7.2
9.7
7.7
10.2
8.2
10.7
8.7
11.2
9.2
11.7
9.7
12.2
10.2
12.7
10.7
13.2
11.2
13.7
11.7
14.2
12.2
125/150/200mm Castor 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
250mm Adjustable Leg 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
1450 4 Rung Frame 2 2 2 2 2 2 2 2 2 2 2 2
1450 6 Rung Frame 2 2 2 2 2 2 2 2 2 2 2
1450 8 Rung Frame 2 2 2 4 2 4 4 6 4 6 6 8 6 8 8 10 8 10 10 12 10 12
1.8m / 2.5m Fixed Deck 1 1 1* 2 1 1 1 2 1 1 1 2 1 1 1 2 1 1 1 2 1 1 1
1.8m / 2.5m Trap Deck 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 5 5 5 5 6 6 6
1.8m / 2.5m Horizontal Brace (Red) 6 6 6 6 10 10 10 10 14 14 14 14 18 18 18 18 22 22 22 22 26 26 26
2.1m / 2.7m Diagonal Brace 2 3 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
BoSS Clima 1450 to EN 1004: Available in 2 lengths - 1.8m and 2.5m. Internal/external use - towers under 2.5m are outside of the scope of EN 1004
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Quantity Schedule
1450 width towers
Internal or external use Internal use only
Component Working height (m)
Platform height (m)
3.2
1.2
3.7
1.7
4.2
2.2
4.7
2.7
5.2
3.2
5.7
3.7
6.2
4.2
6.7
4.7
7.2
5.2
7.7
5.7
8.2
6.2
8.7
6.7
9.2
7.2
9.7
7.7
10.2
8.2
10.7
8.7
11.2
9.2
11.7
9.7
12.2
10.2
12.7
10.7
13.2
11.2
13.7
11.7
14.2
12.2
1.8m / 2.5m Side Toe Board 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
1.2m End Toe Board
2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
Toe Board Holder 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
SP7 Fixed Stabiliser
4 4 4 4 4 4
SP10 Telescopic Stabiliser
4 4 4 4 4 4 4 4 4 4 4 4 4
SP15 Telescopic Stabiliser
4
Total Tower Self-Weight (kgs) 1.8m
93 101 106 150 165 174 180 201 216 238 244 265 280 288 310 316 331 339 346 367 382 390 397
Total Tower Self-Weight (kgs) 2.5m
110 118 123 173 190 198 206 232 249 271 278 305 322 330 352 364 381 390 397 424 441 449 456
IMPORTANT: Please ensure you also read the Quantity Schedule on page 8
*If you are unable to position the working platform easily from the ground, you may height. require an additional fixed platform for this tower weight
BoSS Clima 1450 to EN 1004: Available in 2 lengths - 1.8m and 2.5m. Internal/external use - towers under 2.5m are outside of the scope of EN 1004
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BoSS Clima 3T User Guide
9
The MAXIMUM SAFE WORKING LOAD (the combined weight of the
users, tools and materials) that may be placed on the tower is the
total weight less than the self-weight of the tower. The total weight for
the towers shown in the schedule is 950kg.
Example 1:
A 1450 tower built using the 3T method with a 4.2m platform height
and a platform length of 1.8m has a self-weight of 180kg.
950kg total weight - 180kg self-weight = 770kg maximum safe
working load (users, tools and materials).
Example 2:
A 1450 tower built using the 3T method with a 11.7m platform height
and a platform length of 2.5m has a self-weight of 449kg.
950kg total weight - 449kg self-weight = 501kg maximum safe
working load (users, tools and materials).
For greater heights and loads, consult the manufacturer for guidance.
Quantity Schedule
Number of working platforms allowed
1450 width towers
Platform loading
On a 1450 tower, a platform may comprise of a single deck or two
decks placed side by side. The maximum safe working load
(the combined weight of the users, tools and materials) that may be
placed on a platform is 275kg. This must be evenly distributed over
either one deck, or two decks placed side by side.
The quantities on pages 7 and 8 will enable BoSS towers to be built
safely and therefore comply with the requirements of the Work at
Height Regulations. They include double guardrails to all platforms.
Toe boards will need to be added if any levels are used as working
platforms and for storage of materials.
EN 1004 requires platforms at least every 4.2m, and these measures
will exceed that requirement.
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Quantity Schedule
1450 width towers
Ballast: internal/external use
There is no requirement for ballast on 1450 towers if using stabilisers
as detailed in the table on page 8.
Mobile outriggers
MP16 outriggers can be used instead of SP15 stabilisers, as detailed
below. Mobile outrigger kits comprise of:
Stabilisers
To improve rigidity, larger stabilisers can be used at a lower level
than shown in the table on page 8.
Angle of stabiliser 1450 tower
X
X
90%
Double width 1450 towers dimension x
Mobile outrigger kit
MP16 Mobile Outrigger 4
125/150/200mm Castor
(Use same diameter castors as
on tower)
4
250mm Adjustable leg 4
Plan Braces 4
The above components replace:
SP15 Stabiliser
4
Platform length 1.8m Platform length 2.5m
SP7 X= 3351 X= 3629
SP10 X= 4789 X= 5100
SP15 X= 5520 X= 5838
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BoSS Clima 3T User Guide
11
Quantity Schedule
850 width towers
BoSS Clima 850 to EN 1004: Available in 2 lengths - 1.8m and 2.5m. Internal/external use - towers under 2.5m are outside of the scope of EN 1004
Internal or external use Internal use only
Component Working height (m)
Platform height (m)
3.2
1.2
3.7
1.7
4.2
2.2
4.7
2.7
5.2
3.2
5.7
3.7
6.2
4.2
6.7
4.7
7.2
5.2
7.7
5.7
8.2
6.2
8.7
6.7
9.2
7.2
9.7
7.7
10.2
8.2
10.7
8.7
11.2
9.2
11.7
9.7
12.2
10.2
12.7
10.7
13.2
11.2
13.7
11.7
14.2
12.2
125/150/200mm Castor
4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
250mm Adjustable Leg
4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
850 4 Rung Frame 2 2 2 2 2 2 2 2 2 2 2 2
850 6 Rung Frame 2 2 2 2 2 2 2 2 2 2 2
850 8 Rung Frame 2 2 2 4 2 4 4 6 4 6 6 8 6 8 8 10 8 10 10 12 10 12
1.8m / 2.5m Trap Deck
1 1 1* 2 2 2 2 3 3 3 3 4 4 4 4 5 5 5 5 6 6 6 6
1.8m / 2.5m Horizontal Brace (Red)
6 6 6 6 10 10 10 10 14 14 14 14 18 18 18 18 22 22 22 22 26 26 26
2.1m / 2.7m Diagonal Brace
2 3 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
1.8m / 2.5m Side Toe Board
2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
0.6m End Toe Board
2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
IMPORTANT: Please ensure you also read the Quantity Schedule on page 12.
* If you are unable to position the working platform easily from the ground, you may require an additional fixed platform for this tower height.
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IMPORTANT: Please ensure you also read the Quantity Schedule on page 11.
* If you are unable to position the working platform easily from the ground, you may require an additional fixed platform for this tower height.
Quantity Schedule
850 width towers
Internal or external use Internal use only
Component Working height (m)
Platform height (m)
3.2
1.2
3.7
1.7
4.2
2.2
4.7
2.7
5.2
3.2
5.7
3.7
6.2
4.2
6.7
4.7
7.2
5.2
7.7
5.7
8.2
6.2
8.7
6.7
9.2
7.2
9.7
7.7
10.2
8.2
10.7
8.7
11.2
9.2
11.7
9.7
12.2
10.2
12.7
10.7
13.2
11.2
13.7
11.7
14.2
12.2
Toe Board Holder 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
SP7 Fixed Stabiliser
4 4 4 4 4
SP10 Telescopic Stabiliser
4 4 4 4 4 4 4
SP15 Telescopic Stabiliser
4 4 4 4 4 4 4 4 4
Total Tower Self-Weight (kgs) 1.8m
72 79 105 125 139 145 151 184 197 203 209 244 257 263 269 274 288 294 314 334 347 354 359
Total Tower Self-Weight (kgs) 2.5m
83 90 117 142 158 165 171 209 225 232 238 277 293 300 306 317 332 339 360 385 401 408 414
BoSS Clima 850 to EN 1004: Available in 2 lengths - 1.8m and 2.5m. Internal/external use - towers under 2.5m are outside of the scope of EN 1004
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BoSS Clima 3T User Guide
13
The MAXIMUM SAFE WORKING LOAD (the combined weight of the
users, tools and materials) that may be placed on the tower is the
total weight less the self-weight of the tower. The total weight for the
towers shown in the schedule is 950kg.
Example 1:
An 850 tower built using the 3T method with a 4.2m platform height
and a platform length of 1.8m has a self-weight of 151kg.
950kg total weight - 151kg self weight = 799kg maximum safe
working load (users, tools and materials).
Example 2:
An 850 tower built using the 3T method with a 11.7m platform height
and a platform length of 2.5m has a self-weight of 408kg.
950kg total weight - 408kg self-weight = 542kg maximum safe
working load (users, tools and materials).
For greater heights and loads, consult your supplier for guidance.
Quantity Schedule
Number of working platforms allowed
850 width towers
Platform loading
On an 850, tower a platform comprises of a single deck only. The
maximum safe working load (the combined weight of the users,
tools and materials) that may be placed on a platform is 275kg,
evenly distributed over the deck.
The quantities on pages 11 and 12, will enable BoSS towers to
be built safely and therefore comply with the requirements of the
Work at Height Regulations 2005. They include double guardrails
to all platforms, and toe boards will need to be added if any levels
are used as working platforms and for storage of materials.
EN 1004 requires platforms at least every 4.2m, and these
measures will exceed that requirement.
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Quantity Schedule
850 width towers
Ballast: internal/external use
There is no requirement for ballast on 850 towers if using
stabilisers as detailed in the table on page 12.
Mobile outriggers
MP16 outriggers can be used instead of SP15 stabilisers, as
detailed below. Mobile outrigger kits comprise:
Mobile outrigger kit
MP16 Mobile Outrigger 4
125/150/200mm Castor
(Use same diameter castors as on tower)
4
250mm Adjustable leg 4
Plan Braces 4
The above components replace:
SP15 Stabiliser
4
Stabilisers
To improve rigidity, larger stabilisers can be used at a lower level
than shown in the table on page 12.
X
X
90%
Platform length 1.8m Platform length 2.5m
SP7 X= 2994 X= 3201
SP10 X= 4458 X= 4734
SP15 X= 5195 X= 5485
Stabiliser feet should form a square as shown in the diagram and
table above.
Single width 850 towers dimension x
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BoSS Clima 3T User Guide
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Assembly Procedure
Mobile towers - 3T method
Assembly and dismantling procedures
● To comply with the Work at Height Regulations we show
assembly procedures with platforms every 2 metres in height,
and, the locating of guardrails in advance of climbing onto a
platform to reduce the risk of a fall.
● All platforms feature double guardrails on both faces of either
individual platforms or fully decked levels.
● All guardrails should be 2 and 4 rungs (0.5m and 1.0m) above
platforms.
● Never stand on an unguarded platform positioned above the rst
rung of a tower. If your risk assessment shows it necessary, you
may also need to guardrail platforms at this level.
● Always start building with the smallest height frames at the base
of the tower:
When building a boss tower:
Platform height in metres Frame at base
1.7, 2.2, 3.7, 4.2, 5.7, 6.2, 7.7, 8.2, 9.7, 10.2, 11.7, 12.2 4 rung
2.7, 4.7, 6.7, 8.7, 10.7 6 rung
1.2, 3.2, 5.2, 7.2, 9.2, 11.2 8 rung
Where all three frame heights are used in a tower, start with 4
rung frames at the base, with the 6 rung frames next and the 8
rung frames on the top. Refer to the quantity schedules for detail.
To dismantle a Boss Ladderspan tower
● Remove toe boards, and pass down the tower.
● Unclip farthest end of braces and immediately go to
protected trapdoor position on ladder to complete removal.
● Remove upper platforms from protected platform levels
below.
● Pass removed components out of the tower to a colleague.
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Safety Checklist
Mobile towers - 3T method
Checklist
Ensure all brace claws operate and lock correctly prior to erection
Inspect components prior to erection
Inspect tower prior to use
Tower upright and level
Castors locked and legs correctly adjusted
Diagonal braces tted
Stabilisers/outriggers tted as specied
Platforms located and wind-locks on
Toe boards located
Check guardrails are tted correctly. See illustration below.
Ensure horizontal braces and guardrails are tted correctly.
Always t as shown.
Refer to this checklist before using each time.
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BoSS Clima 3T User Guide
Push four castors onto four adjustable legs. Insert adjustable
legs into two end frames as shown. Lock castor brakes. Base
plates can be tted to adjustable legs if it is not necessary to move
the tower.
17
Assembly Procedure
Mobile towers - 1450 3T method
Always start building with the smallest height
frames at the base of the tower:
Platform height in metres Frame at base
1.7, 2.2, 3.7, 4.2, 5.7, 6.2, 7.7, 8.2, 9.7, 10.2, 11.7, 12.2 4 rung
2.7, 4.7, 6.7, 8.7, 10.7 6 rung
1.2, 3.2, 5.2, 7.2, 9.2, 11.2 8 rung
Assembly for 1450 towers
Where all three frame heights are used in a tower, start with 4 rung
frames at the base, with the 6 rung frames next and the 8 rung
frames on the top. Refer to the Quantity Schedules for detail.
The procedure illustrated shows 4.2m platform height tower starting
with a 4 rung frame.
BoSS recommend two persons are used to build BoSS Towers.
Above 4m height, it is essential that at least two persons are used.
Only climb the tower from the inside.
1
Unlocked
Locked
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Fit one horizontal brace (red) onto the vertical of an end frame,
just above the bottom rung, with the claw facing outwards.
Note: All locking claws must be opening before tting.
2
Assembly Procedure
Locked
Position the second end frame as shown and at the other end
of the horizontal brace onto the vertical, just above the bottom
rung. Fit a second horizontal brace between the bottom rungs on the
other side of the frames to square the tower.
3
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Fit two additional end frames and check that the frame interlock
clips are engaged. Fit two diagonal braces (blue) in opposing
directions between the 2nd and the 6th rungs. Ensure the frames
are vertical and level by checking with a spirit level and setting the
adjustable legs as required.
IMPORTANT - Only use the adjustable legs to level the tower and not
to gain extra height.
4
Assembly Procedure
INTERLOCK CLIP
Locked Unlocked
Fit stabilisers
(see notes on page 30)
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Fit a temporary deck on the lowest rungs. Fit a trapdoor deck
on the 8th rung (2.0m) on one side of the tower. Ensure that
the trapdoor is positioned with the hinges towards the outside of the
tower as shown. Climb the end frame below the trapdoor on the
inside of the tower, and from within the protected trapdoor position,
t horizontal braces on the 10th and 12th rungs (in that order) on
both sides of the deck.
Do not climb onto the deck until all guardrails are in place.
When horizontal braces are tted as guardrails, they should be 0.5m
and 1.0m (2 and 4 rungs) above the deck level.
Remove the temporary deck from the lowest rung.
5
Assembly Procedure
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Fit the next pair of diagonal braces in opposing directions
between the 6th and 10th rungs add two additional end frames.
6
Assembly Procedure
Add two more diagonal braces between the 10th and 14th
rungs. If nishing at this height (4.2m platform), the xed
deck should be repositioned to the 16th rung on the opposite side of
the tower to the trapdoor deck. Fit a trapdoor deck alongside it with the
hinges towards the outside of the tower and the trapdoor in line with the
one below. Climb the tower and from the protected trapdoor position, t
the horizontal braces as guardrails on both sides at 2 and 4 rungs (0.5
and 1.0m) above the platform level. At the nal level, a further diagonal
braces should be added on one side of the tower as shown.
7
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Continue to add pairs of end frames, diagonal braces and t
trapdoor decks as shown in the previous steps. At every
platform level, add horizontal braces as guardrails at 2 and 4 rungs
above the platform.
Fit these guardrail braces from the protected trapdoor position. Do
not climb onto the platform until all guardrails are in place.
8
Assembly Procedure
When building beyond a 4.2m platform height.
Continue until the required height is reached. Re-position the xed
deck to the required platform height and t a trapdoor deck alongside
it as shown in Stage 7. Fit the guardrails as shown in Stage 7.
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Fit toe boards (see Instructions on page 29).
The tower is now complete.
9
Assembly Procedure
Dismantling procedure
To take down the tower, reverse the building sequence. When
removing guardrail braces, unlock the claws furthest from
the trapdoor and then return immediately to the protected position
within the trapdoor. You may then unlock the claws at the other ends
of the guardrails to remove them from the tower.
10
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Insert adjustable leg/castor assemblies into end frames and
lock the castors, (see diagram Step 1 - page 17). Base plates
can be tted to the adjustable legs if it is not necessary to move the
tower. Fit two horizontal braces to the 850 end frames as shown in
steps 2 and 3 for the 1450 tower procedure (page 18). Ensure that
the frames are vertical and level by checking with a spirit level and
setting the adjustable legs required.
24
Fit a trapdoor deck on the 4th rung. Fix the horizontal braces
(red) as guardrails on the 6th and 8th rungs (2 and 4 rungs
above the platform) on both sides of the tower.
Assembly Procedure
Mobile towers - 850 3T method
Always start building with the smallest height
frames at the base of the tower:
Platform height in metres Frame at base
1.7, 2.2, 3.7, 4.2, 5.7, 6.2, 7.7, 8.2, 9.7, 10.2, 11.7, 12.2 4 rung
2.7, 4.7, 6.7, 8.7, 10.7 6 rung
1.2, 3.2, 5.2, 7.2, 9.2, 11.2 8 rung
Assembly for 850 towers
Where all 3 Heights are used in a tower, start with 4 rung frames at
the base, with the 6 rung frames next and the 8 rung frames on top.
Refer to the quantity schedules for detail. The procedure illustrated
shows a tower starting with an 8 rung frame.
1
2
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BoSS Clima 3T User Guide
25
Assembly Procedure
Fit two diagonal braces (blue) in opposing directions between
the 2nd and 6th rungs. Ensure the frames are vertical and
level by checking with a spirit level and setting the adjustable legs
as necessary. Fit the next pair of end frames and check the frame
interlock clips are engaged. Fit stabilisers (see notes on page 30).
3
INTERLOCK CLIP
Locked Unlocked
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26
Assembly Procedure
Fit two pairs of diagonal braces in opposing directions between
the 6th and 10th rungs and the 10th and 14th rungs. Locate a
trapdoor deck on the 12th rung.
4
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BoSS Clima 3T User Guide
27
Assembly Procedure
Climb up the inside of the tower and from the protected position
of the trapdoor, t horizontal braces as guardrails (on both
sides) to the 14th and 16th rungs (2 and 4 rungs above the platform in
that order).
5
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bossaccesstowers.com
28
Assembly Procedure
Continue the procedure until the required working height is
reached, adding additional pairs of end frames, diagonal
braces and tting trapdoor platforms, as shown on previous steps. At
every platform level, add horizontal braces as guardrails at 2 and 4
rungs above the platform (in that order) on both sides of the platform.
(as shown in Step 5).
Fit these guardrail braces from the protected trapdoor position.
Do not climb onto the platform until all guardrails are in place.
At the nal level, a further diagonal brace should be added on one
side of the tower as shown.
Fit the toe boards (see instruction on page 29).
The tower is now complete.
6
Dismantling procedure
To take down the tower, reverse the building sequence. When
removing guardrail braces, unlock the four claws furthest from
the trapdoor and return immediately to the protected position within
the trapdoor and then return immediately to the protected position
within the trapdoor. You may then unlock the claws at the other ends
of the guardrails to remove them from the tower.
7
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BoSS Clima 3T User Guide
29
Toe Boards
Mobile towers - 3T method
Fitting toe boards
Lock yellow plastic toe board clips over rung and deck claw as
shown. Position as (A) on right hand deck claw. On other side of
the working platform, position the clip as (B). Place 25mm thick toe
boards into slots in toe board clips as shown.
Side Toe Board
End Toe Board
Toe Board Clip
Claw
Rung
Deck
(B)
(A)
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30
Stabilisers and Outriggers
Mobile towers - 3T method
Stabilisers
Attach one stabiliser to each corner of the tower as shown. Ensure
stabiliser feet are equally spaced to form a square. SP10 and SP15
telescopic stabilisers must always be fully extended.
Position the lower clamp so that the lower arm is as close to the
horizontal as possible. Adjust the position of the top clamp to ensure
the stabiliser foot is in rm contact with the ground. Ensure clamps
are secure.
Stabilisers are used when the tower is to be moved occasionally,
frequent movement will require mobile outriggers.
When moving the tower, adjust the top clamps to lift the four
stabiliser feet a maximum of 25mm off the ground and then unlock
the castor brakes. After moving, ensure all four stabiliser feet are
repositioned in rm contact with the ground.
Stabiliser dimensions
'
Max. Extension
y
SP7 1227
SP10 2241
SP15 2757
Outriggers
For information on mobile outriggers please consult your supplier.
Page 32
PN03302700
Members of:
Members of:
©2017 WernerCo Rev. 10/17
For further information about this
product or any other products and
services, please contact:
The Causeway, Maldon,
Essex, CM9 4LJ,
United Kingdom
+44 (0)1621 745900
+44 (0)1621 859845
uk.customercare@wernerco.com
bossaccesstowers.com
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