Altrad BOSS ZONE 1 User manual

LIGHT ACCESS
BOSS ZONE 1
User Guide
LW.LH/10.21

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Contents
Safety First
Introduction ..............................................................................................................................................................3
Compliances .............................................................................................................................................................3
Preparation and Inspection ..................................................................................................................................3
Safe Use.....................................................................................................................................................................4
Lifting of Equipment................................................................................................................................................4
Stabilisers/Ballast.....................................................................................................................................................4
Movement .................................................................................................................................................................5
During Use ................................................................................................................................................................5
Ties ..............................................................................................................................................................................6
Stabilisers ..................................................................................................................................................................6
Maintenance - Storage - Transport.....................................................................................................................7
Quantity Schedule
1450 Width Towers...........................................................................................................................................9-12
850 Width Towers .......................................................................................................................................... 13-16
Assembly Procedure
Assembly and Dismantling Procedures ...........................................................................................................17
Checklist...................................................................................................................................................................18
Assembly for 1450 Towers........................................................................................................................... 19-26
Dismantling for 1450 Towers .............................................................................................................................27
Assembly for 850 Towers ............................................................................................................................. 28-32
Stabilisers and Outriggers
Stabilisers ................................................................................................................................................................33
Disclaimer & Copyright
Disclaimer & Copyright .......................................................................................................................................34

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Safety First
Mobile Towers - 3T method
Introduction
Compliances
Preparation and Inspection
Please read this User guide carefully. Please note that diagrams are for illustrative purposes only.
User guides are also available to download - please contact us for details.
BoSS mobile GRP (breglass) towers are light-weight scaold towers for use in Zone 1 applications
where aluminium or steel systems are either unsafe or unsuitable. They provide indoor and out-
door 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 towers must be competent. Any person erecting,
dismantling or altering a BoSS Zone 1 mobile tower must have a copy of this guide. For further in-
formation on the use of mobile access and working towers consult the PASMA code of practice. If
you need further information, design advice, additional guides or any other help with this product,
please contact Altrad Generation.
The BoSS Clima aluminium system has been tested and certied to EN 1004: 2004 Class 3
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.

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Safety First
Safe Use
Lifting of Equipment
Stabilisers/Ballast
• Check that all components are on site, 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 275 kgs (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.
• 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
• Stabilisers or outriggers and ballast weights should always be tted when specied.
• 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.

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Safety First
Movement
During Use
• The tower should only be moved by manual eort, 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
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).
• Beware of high winds in exposed, gusty or medium breeze conditions. We recommend that
in wind speeds over 7.7 metres per second (17 mph), 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 - 25 mph) tie the tower to a rigid structure. If the wind is likely to reach gale force (over
18 metres per second - 40 mph), the tower should be dismantled.
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 difficult 8 39 - 46 17 - 21

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Safety First
During Use
Ties
• Beware of open ended buildings, which can cause a funnelling eect.
• 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 20kg.
• 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.
• 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.

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Safety First
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 windlocks should be regularly
checked to ensure they lock correctly.
•
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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Safety First

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Quantity Schedule
1450 Width Towers
Component Weight Internal/External Platform Height(m) Internal Use Platform Height(m)
1.8 2.5 1.2 1.7 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
125/150/200mm Castor 3.25 3.25 444444444444444444 4 4 4 4 4 Adjustable Leg Assembly 1.1 1.1 444444444444444444 4 4 4 4 4 1450 2 Rung Ladder Frame 12.63 12.63 1 1 1 1 1 1 1 1 1 1 1 1 1450 2 Rung Span Frame 6.71 6.71 1 1 1 1 1 1 1 1 1 1 1 1 1450 3 Rung Ladder Frame 15.1 15.1 1 1 1 1 1 1 1 1 1 1 1 1450 3 Rung Span Frame 9.48 9.48 1 1 1 1 1 1 1 1 1 1 1 1450 4 Rung Ladder Frame 17.57 17.57 1 1 1 2 1 2 2 3 2 3 3 4 3 4 4 5 4 5 5 6 5 6 1450 4 Rung Span Frame 12.24 12.24 1 1 1 2 1 2 2 3 2 3 3 4 3 4 4 5 4 5 5 6 5 6 1.8m and 2.5m Fixed Deck 17 23 1 1 1* 2 2 2 2 3 3 3 3 4 4 4 4 3 3 3 3 4 4 4 4 1.8m and 2.5m Trap Deck 19 25 111122223333444333 3 3 4 4 4 1.8m and 2.5m Horizontal Brace (Red) 2 2.49 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 and 2.7m Diagonal Brace 2.3 2.61 2 3 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
BoSS ZONE 1 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 EN1004 NOTE: Above 8.2m it is necessary to reposition platforms during the assembly and dismantling process to reduce the self weight of the tower and opti- mise the maximum safe working load. * If you are unable to position the working platform easily from the ground, you may require an additional xed platform for this tower height. IMPORTANT: Please ensure you also read the quantity schedule on page 8.

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Quantity Schedule
1450 Width Towers
Component Weight Internal/External Platform Height(m) Internal Use Platform Height(m)
1.8 2.5 1.2 1.7 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
1.8m/2.5m Side Toeboard 3.18 4.42 22222222222222222222222 1.2m End Toeboard 2.11 2.11 22222222222222222222222 Small Stabiliser 4.7 4.7 4444444 Large Stabiliser 5.5 5.5 4444444444444 Total Tower self weight (kgs) 1.8m 1.8 112 128 133 177 211 228 235 260 294 311 321 346 380 397 404 376 391 408 415 440 474 491 498 Total Tower self weight (kgs) 2.5m 2.5 130 146 152 201 244 261 269 300 342 359 370 401 444 460 468 428 446 463 471 501 544 561 569 Max Tower Load 720 720 720 720 720 720 720 720 720 720 720 720 720 720 720 720 720 720 720 720 720 720 720 Max Safe Load 1.8 610 593 588 545 510 494 486 462 427 411 400 375 341 324 317 345 330 313 306 381 247 230 223 Max Safe Load 2.5 592 575 570 520 477 460 453 422 379 362 351 320 278 261 253 293 275 259 251 220 177 160 153
BoSS ZONE 1 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 EN1004 NOTE: Above 8.2m it is necessary to reposition platforms during the assembly and dismantling process to reduce the self weight of the tower and opti- mise the maximum safe working load.

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Quantity Schedule
1450 Width Towers
Number Of Working Load Platforms Allowed
Platform Loading
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 - 180kg = 770kg maximum safe working load
total weight self weight (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 - 449kg = 501kg maximum safe working load
total weight self weight (users, tools and materials)
For greater heights and loads, consult BoSS for guidance.
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 9 & 10 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. Toeboards 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 With Towers
Ballast : Internal
Stabilisers
Angle of Stabiliser 1450 Tower
There is no requirement for ballast on 1450 towers if using stabilisers as detailed in the table on
page 9
To improve rigidity, larger stabilisers can be used at a lower level than shown in the table onpage
9

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Component Weight Internal/External Platform Height(m) Internal Use Platform Height(m)
1.8 2.5 1.2 1.7 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
125/150/200mm Castor 3.25 3.25 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
Adjustable Leg Assembly 1.1 1.1 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 850 Rung Ladder Frame 9.1 9.1 1 1 1 1 1 1 1 1 1 1 1 1
850 2 Rung Span Frame 3.52 3.52 1 1 1 1 1 1 1 1 1 1 1 1 850 3 Rung Ladder Frame 10.4 10.4 1 1 1 1 1 1 1 1 1 1 1
850 3 Rung Span Frame 4.99 4.99 1 1 1 1 1 1 1 1 1 1 1
850 4 Rung Ladder Frame 11.7 11.7 1 1 1 2 1 2 2 3 2 3 3 4 3 4 4 5 4 5 5 6 5 6 850 4 Rung Span Frame 6.58 6.58 1 1 1 2 1 2 2 3 2 3 3 4 3 4 4 5 4 5 5 6 5 6
1.8m and 2.5m Fixed Deck 17 23 1 1 1* 2 2 2 2 3 3 3 3 4 4 4 4 3 3 3 3 4 4 4 4
1.8m and 2.5m Trap Deck 19 25 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 3 3 3 3 3 4 4 4 1.8m and 2.5m Horizontal Brace (Red) 2 2.49 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 and 2.7m Diagonal Brace 2.3 2.61 2 3 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Quantity Schedule
850 Width Towers
BoSS ZONE Ladderspan 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 EN1004 If you are unable to position the working platform easily from the ground, you may require an additional xed platform for this tower height.

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Quanitity Schedule
850 Width Towers
Component Weight Internal/External Platform Height(m) Internal Use Platform Height(m)
1.8 2.5 1.2 1.7 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
1.8m/2.5m Side Toeboard 3.18 4.42 22222222222222222222222 0.6m End Toeboard 1.04 1.04 22222222222222222222222 Small Stabiliser 4.7 4.7 4 4 4 4 4 4 4 Large Stabiliser 5.5 5.5 4444444444444 Ballast Required (External) 1.6m 1 Ballast Required (External) 2.5m 1 25 50 75 Total Tower self weight (kgs) 1.8m 1.8 80 92 113 138 151 163 168 195 208 220 226 250 263 275 280 304 317 329 335 359 372 384 389 Total Tower self weight (kgs) 2.5m 2.5 92 104 126 156 172 184 189 223 239 251 256 287 327 365 395 350 366 378 384 414 430 442 447 Max Tower Load 720 720 720 720 720 720 720 720 720 720 720 720 720 720 720 720 720 720 720 720 720 720 720 Max Safe Load 1.8 640 628 607 582 569 557 552 525 512 500 494 470 457 445 440 416 403 391 385 361 348 336 331 Max Safe Load 2.5 628 616 594 664 548 536 531 497 481 469 464 433 393 355 325 370 354 342 336 306 290 278 273
BoSS ZONE Ladderspan 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 EN1004
NOTE: Above 8.2m it is necessary to reposition platforms during the assembly and dismantling process to reduce the self weight of the tower and optimise the maximum safe working load.

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Quantity Schedule
850 Width Towers
Number Of Working Load Platforms Allowed
Platform Loading
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 - 151kg = 799kg maximum safe working load
total weight self weight (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 - 408kg = 542kg maximum safe working load
total weight self weight (users, tools and materials)
For greater heights and loads, consult Youngman for guidance.
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 13 & 14, 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 toeboards 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
Stabilisers
Angle of Stabiliser 850 Tower
There is no requirement for ballast on 850 towers if using stabilisers as detailed in the table on
page 13
To improve rigidity, larger stabilisers can be used at a lower level than shown in the table on page
13

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Assembly Procedure
Mobile Towers - 3T Method
Assembly and Dismantling Procedures
When building a BoSS Tower:
• 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:
• Remove toeboards, 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.
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 2 rung
2.7, 4.7, 6.7, 8.7, 10.7 3 rung
1.2, 3.2, 5.2, 7.2, 9.2, 11.2 4 rung
Where all 3 frame heights are used in a tower, start with 2 rung frames at the base, with the 3
rung frames next and the 4 rung frames on the top. Refer to the quantity schedules for detail.
To Dismantle a BoSS Zone 1 Tower

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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 specied
• Platforms located and windlocks on
• Toeboards located
• Check guardrails are tted correctly. See
illustration below.
• Check frame interlock clips are locked. See illustration.
• Ensure horizontal braces and guardrails are tted correctly.. Always t as shown.

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Assembly Procedure
Mobile Towers - 3T Method
Assembly for 1450 Towers
1.
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 2 rung
2.7, 4.7, 6.7, 8.7, 10.7 3 rung
1.2, 3.2, 5.2, 7.2, 9.2, 11.2 4 rung
Where all 3 frame heights are used in a tower, start with 2 rung frames at the base, with the 3
rung frames next and the 4 rung frames on the top. Refer to the Quantity Schedules for detail.
The procedure illustrated shows 4.2m platform height tower starting with a 2 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.
Push castor into adjustable leg. Push castor / adjustable leg assemblies into 2 rung span frame.
Lock castors. Repeat procedure with 2 rung ladder frame. It is recommended that for ease of
levelling a gap of 50mm is left between the bottom of the leg and the adjustable nut. Adjustable
Legs are for levelling only. You must not adjust all four to gain extra height.
Note: Base Plates can be tted to
adjustable legs in lieu of castors if it
is not necessary to move the tower.