HSS Hire BOSS 1450 Troubleshooting guide

Boss Alloy Access
Towers
Tower Components
This BOSS User Guide is designed to provide you with step by
step instructions to ensure your system is erected easily and safely
using the 3T (Through the Trapdoor) method. Before assembly,
please read the Safety Notes carefully.
The law requires that operatives must be competent and qualified
to erect the tower. If another person is involved, please pass on
these instructions.
For further information on the safe use of Mobile Access Towers
consult the PASMA Guide or EN 1298.
4 RUNG SPAN
FRAME
END
TOEBOARDS
SIDE
TOEBOARDS
HORIZONTAL
BRACE
DIAGONAL
BRACE
2 RUNG LADDER
FRAME
ADJUSTABLE LEG
STABILISER
CASTOR
PLATFORM
(FIXED AND
TRAP DOOR
DECKS)
INTRODUCTION
BALLAST: 1450 LADDERSPAN
Internal/External use - There is no requirement for ballast
on 1450 towers if using stabilisers as detailed in the
QUANTITY SCHEDULE and the stabilisers have been fully
deployed in accordance with the user guide.
STABILISERS
For Internal use only, SP10 stabilisers may be fitted on
1.45 m x 1.8 m towers up to 10.2 m platform height or
12.2 m platform height for 1.45 m x 2.5 m towers.
To improve rigidity, larger stabilisers can be used at a
lower level than shown in the table.
NUMBER OF WORKING PLATFORMS ALLOWED
The number of working levels is based on fully loading
each single deck to the maximum of 275 kg. A deck is
defined as a single unit, but a working platform can be
either one or two decks. The 275 kg limit applies to each
such working level, regardless of the number of decks.
Under normal circumstances only two such working
levels are permissable, as with the taller
structures/lengths self-weight will be a limiting factor.
Maximum Safe Working Load for the tower structure is
950 kg.
Should heavier loads than these be required for
particular applications, your local Branch will be able to
provide guidance.
The quantities in the schedule will enable 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 / or for storage of materials.
BS1139 requires platforms at least every 4m, and these
measures will exceed that requirement.
NUMBER OF WORKING PLATFORMS ALLOWED
The number of working levels is based on fully loading
each single deck to the maximum of 275 kg.
The number of working levels will be limited by the total
Safe Working Load of the tower.
The Maximum Safe Working Load for the tower structures
shown is 950 kg. For heights in excess of these, and for
heavier loads, consult your local HSS Hire for guidance.
The quantities in the schedule will enable 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 / or for storage of materials.
BS1139 requires platforms at least every 4m, and these
measures will exceed that requirement.
BALLAST 850 LADDERSPAN: - Internal/External use.
Stabiliser requirements are based on calculations from
BS1139:
Above 8.2 m, the schedule is for internal use only.
For Internal use only, towers may be erected up to
12.2 m platform height without ballast.
For External use, towers fitted with a 2.5 m length
platform must have ballast fitted as follows:
7.2 m platform height = 25 kg ballast
8.2 m platform height = 75 kg ballast
Ballast is used at the base to stabilise towers against
overturning. It must be 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, and be supported on the
lowest rung of the bottom frame.
STABILISERS
The QUANTITY SCHEDULE shows the recommended
stabilisation. In circumstances where there is
restricted ground clearance for stabilisers / outriggers,
contact your local HSS Hire for advice.
SP10 stabilisers may be fitted up to 6.2 m platform height
Externally and 9.2 m Internally.
Fitting SP15 stabilisers at heights lower than these will
increase rigidity and provide additional stability.
1.45 m X 1.8 m INTERNAL/EXTERNAL USE INTERNAL USE ONLY
BOSS 1450 WIDE WORKING HEIGHT 4.2 m 5.2 m 6.2 m 7.2 m 8.2 m 9.2 m 10.2 m 11.2 m 12.2 m Additional
LADDERSPANPLATFORM HEIGHT2.2m3.2m4.2m5.2m6.2m7.2m8.2m9.2m10.2m Lift 1.0 m
1.8mSIDETOEBOARD 222222222
1.2mENDTOEBOARD 222222222
TOEBOARDHOLDER 444444444
1.8mFIXEDDECK 111111111
1.8mTRAPDOORDECK 1223344551
1.8 m HORIZONTAL BRACE (RED) 6 10 10 14 14 18 18 22 22 4
2.1mDIAGONALBRACE(BLUE) 357911131517192
1.45 m 2-RUNG LADDER FRAME 1 1 1 1 1 1
1.45 m 2-RUNG SPAN FRAME 1 1 1 1 1 1
1.45m4-RUNGLADDERFRAME 122334455
1.45m4-RUNGSPANFRAME 122334455
150 mm CASTOR WHEEL 444444444
ADJUSTABLELEG 444444444
SP10TELESCOPICSTABILISER 44444444
TOWER (SELF-WEIGHT) kg 103 161 175 210 224 272 286 320 334 34
QUANTITY SCHEDULE BOSS 1450 LADDERSPAN TO HD1004
CHECKLIST
INSPECT COMPONENTS PRIOR TO ERECTION 
INSPECT TOWER PRIOR TO USE 
TOWER UPRIGHT AND LEVEL 
CASTORS LOCKED/LEGS CORRECTLY ADJUSTED 
GUARDRAILS FITTED 
DIAGONAL BRACES FITTED 
STABILISERS/OUTRIGGERS FITTED AS SPECIFIED 
PLATFORMS LOCATED & WINDLOCKS ON 
TOEBOARDS LOCATED 
REFER TO THIS CHECKLIST BEFORE USING EACH TIME
FITTING TOEBOARDS
Lock yellow plastic toeboard 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 toeboards into slots in toeboard clips
as shown.
TOEBOARD CLIP
TOEBOARD
CLAW
RUNG
DECK
A
B
©HSS Hire Service Group Ltd 2006 No. 508/06
Group Office: 25 Willow Lane, Mitcham, Surrey CR4 4TS
Web Site: www.hss.com
…any comments?
If you have any suggestions to
enable us to improve the
information within this guide
please e-mail your comments or
write to the Safety Guide Manager
at the address below
e-mail: [email protected]
Designed to the European Standard
HD1004, the BOSS Alloy Tower provides
the ideal platform for light work.
Two versions are available: 1450 mm &
850 mm wide, each with either 1.8 m or
2.5 m deck lengths.
Operating & Safety Guide 508
508/06
1.45 m X 2.5 m INTERNAL/EXTERNAL USE INTERNAL USE ONLY
BOSS 850 WIDE
WORKING HEIGHT 4.2 m 5.2 m 6.2 m 7.2 m 8.2 m 9.2 m 10.2 m 11.2 m 12.2 m Additional
LADDERSPANPLATFORM HEIGHT2.2m3.2m4.2m5.2m6.2m7.2m8.2m9.2m10.2m Lift 1.0 m
2.5mSIDETOEBOARD 222222222
1.2mENDTOEBOARD 222222222
TOEBOARDHOLDER 444444444
2.5mFIXEDDECK 111111111
2.5mTRAPDOORDECK 1223344551
2.5 m HORIZONTAL BRACE (RED) 6 10 10 14 14 18 18 22 22 4
2.7mDIAGONALBRACE(BLUE) 357911131517192
1.45 m 2-RUNG LADDER FRAME 1 1 1 1 1 1
1.45 m 2-RUNG SPAN FRAME 1 1 1 1 1 1
1.45m4-RUNGLADDERFRAME 122334455
1.45m4-RUNGSPANFRAME 122334455
150 mm CASTOR WHEEL 444444444
ADJUSTABLELEG 444444444
SP10TELESCOPICSTABILISER 44444444
TOWER (SELF-WEIGHT) kg 120 185 201 243 258 313 328 370 385 42
0.85 m X 1.8 m INTERNAL/EXTERNAL USE INTERNAL USE ONLY
BOSS 850 WIDE
WORKING HEIGHT 4.2 m 5.2 m 6.2 m 7.2 m 8.2 m 9.2 m 10.2 m 11.2 m 12.2 m Additional
LADDERSPANPLATFORM HEIGHT2.2m3.2m4.2m5.2m6.2m7.2m8.2m9.2m10.2m Lift 1.0 m
1.8mSIDETOEBOARD 222222222
0.6mENDTOEBOARD 222222222
TOEBOARDHOLDER 444444444
1.8mTRAPDOORDECK 1223344551
1.8 m HORIZONTAL BRACE (RED) 6 10 10 14 14 18 18 22 22 4
2.1 m DIAGONAL BRACE (BLUE) 3 5 7 9 11 13 15 17 19 2
1.45m2-RUNGLADDERFRAME 111111
1.45m2-RUNGSPANFRAME 111111
1.45m4-RUNGLADDERFRAME 122334455
1.45m4-RUNGSPANFRAME 122334455
150 mm CASTOR WHEEL 4 4 4 444444
ADJUSTABLE LEG 4 4 4 4 4 4 4 4 4
SP10 TELESCOPIC STABILISER 4 4 4 4 4
SP15 STABILISER 4444
TOWER (SELF-WEIGHT) kg 106 139 151 198 210 258 270 289 316 19
QUANTITY SCHEDULE BOSS 850 LADDERSPAN TO HD1004
0.85 m X 2.5 m INTERNAL/EXTERNAL USE INTERNAL USE ONLY
BOSS 850 WIDE
WORKING HEIGHT 4.2 m 5.2 m 6.2 m 7.2 m 8.2 m 9.2 m 10.2 m 11.2 m 12.2 m Additional
LADDERSPANPLATFORM HEIGHT2.2m3.2m4.2m5.2m6.2m7.2m8.2m9.2m10.2m Lift 1.0 m
2.5mSIDETOEBOARD 222222222
0.6mENDTOEBOARD 222222222
TOEBOARDHOLDER 444444444
2.5mTRAPDOORDECK 1223344551
2.5 m HORIZONTAL BRACE (RED) 6 10 10 14 14 18 18 22 22 4
2.7mDIAGONALBRACE(BLUE) 357911131517192
1.45 m 2-RUNG LADDER FRAME 1 1 1 1 1 1
1.45 m 2-RUNG SPAN FRAME 1 1 1 1 1 1
1.45m4-RUNGLADDERFRAME 122334455
1.45m4-RUNGSPANFRAME 122334455
150 mm CASTOR WHEEL 444444444
ADJUSTABLELEG 444444444
SP10 TELESCOPIC STABILISER 4 4 4 4 4
SP15 STABILISER 4444
TOWER (SELF-WEIGHT) kg 117 158 172 226 239 294 307 334 362 27
SP10
SP15
250
2500
850
4914
1450
5688
250
1900
850
3939
1450
4671
STABILITY: STABILISERS & OUTRIGGERS
Stabilisers are used when the tower is to be used
occasionally, frequent movement will require Outriggers.
Attach one stabiliser to each corner of the tower at approx.
45 degrees. Secure top clamp below castings, bottom
clamp as low as possible. If Clamp is obstructed, release
and move. Ensure clamps are rigidly fixed to limit
movement.
With SP10 and SP15 Stabilisers, extend telescopic leg until in
contact with ground.
When moving, check for obstructions and lock feet about
25mm off the ground, unlock castors, and move. After
moving, check all castors are in ground contact and lock
Stabiliser feet.
…have you been trained?
The law requires that personnel erecting towers must be competent
and qualified to do so. PASMA accredited Mobile Access Tower
training available at HSS Training Solutions 0845 766 7799
TOWER COMPONENTS
4 RUNG LADDER
FRAME
2 RUNG SPAN
FRAME
508_06.qxp:508_06.qxd 27/3/07 15:11 Page 1

ASSEMBLY PRINCIPLES
WHEN BUILDING A BOSS TOWER:
To comply with the Work at Height
Regulations, we show procedures with
additional platforms and the locating of
Guardrails when building in advance of
climbing onto a platform to reduce the risk of
a fall. This involves moving components, but
is an important procedure for your safety.
Always stand on a Boss Platform, never on the
rungs of a Frame.
All platforms feature double Guardrails on
both faces of either individual platforms or
fully decked levels.
Install Guardrails prior to climbing onto the
platform, from the protected position within
the trapdoor. Working platforms and rest
platforms (every 4 metres) must have
Guardrails installed 0.5 m and 1.0 m (1 and 2
rungs above the platform in ALL cases. All
working levels require toeboards.
DISMANTLING PRINCIPLES
TO DISMANTLE A BOSS TOWER:
Remove toeboards, and pass down the tower.
1450 TOWER
Unclip farthest end of braces and immediately
go to protected Trapdoor position on ladder
to complete removal.
Platforms used whilst dismantling should be
Double-Guardrailed on both faces.
Remove upper platforms from protected platform
levels below.
Pass removed components out of the Tower to a
colleague.
850 TOWER
Follow same procedure.
GENERAL NOTE
The assembly procedure should be
based on:
Always stand on a BOSS
platform, never on the rungs of
a frame.
Install platforms at 2 metre
vertical intervals, to give a
manageable reach height.
Locate double Guardrails
(Horizontal Braces) in advance of
climbing onto any platform.
Working Platforms require
Toeboards.
Always position Trapdoors over
Ladder side, and Fixed Platforms
on opposite side.
Unlocked
Locked
= Fixed Deck
= Trapdoor Deck
2Clip Horizontal Brace (Red) onto
the vertical of the Span Frame,
facing claws outwards.
Frame will now be self-supporting.
Locking claws should be primed
before use, and released for
dismantling or relocation.
3Position the Ladder Frame as
shown.
Clip the other end of the Horizontal
Brace onto the Ladder Frame. Fit
another Horizontal Brace (Red) onto the
lowest horizontal rung of the Frames to
square the tower.
5Add Stabilisers.
See note on Stabilisers. 6Fit a Fixed Deck on the lowest rung.
Fit a Trapdoor Deck on the 4th Rung
(2.0 m) with the Trapdoor next to
the Ladder.
Climb Ladder, and from a protected
Trapdoor position, fit the Guardrails on 5th
and 6th Rungs, in that order, on both
sides of the Platform.
7Fit the next pair of Diagonal
Braces in opposing directions
between the 3rd and 5th Rungs.
Fit an additional Span Frame and
Ladder Frame. Ensure the Interlock
Clips are engaged.
8Fit the next pair of Diagonal
Braces between the 5th and 7th
Rungs.
9If finishing at this height (4.2 m
Platform), the Fixed Deck should
first be repositioned to the 8th
Rung of the Tower. Fit a
Trapdoor alongside it, with the
Trapdoor next to the Ladder.
10 Climb the Ladder and, from a
protected Trapdoor position,
fix Guardrails on the 9th and
10th Rungs, in that order, on
both sides of the Tower. Add
a Diagonal Brace between the
7th and 9th Rung.
11 When building beyond a 4.2 m
platform height Tower -
Continue to add Span and
Ladder Frames, Diagonal
Braces and Trapdoor Platforms
as shown in the previous steps.
Locked
1450 ASSEMBLY
We recommend two persons are
used to build Boss Towers.
Always start building with the
smallest height frames at the base
of the tower:
’The procedure illustrated shows a tower
starting with a 2-Rung Frame’
1Push Castor onto Adjustable
Leg. Insert Adjustable Leg /
Castor assemblies into Frame
and lock castors.
(Alternatively use static Base Plates).
Tower Platform Height in Metres Frame of
Base
2.2 4.2 6.2 8.2 10.2 2 Rung
3.2 5.2 7.2 9.2 4 Rung
4Fit an additional Ladder Frame
and Span Frame. Ensure the
Interlock Clips are engaged.
Fit 2 Diagonal Braces (Blue) in
opposing directions, between the 1st
and 3rd rungs. Ensure the Frames are
vertical and level by checking with a
spirit level and setting the Adjustable
Legs as required.
Locked
Unlocked
INTERLOCK CLIP
12 Fit the Toeboards (see instructions
‘Fitting Toeboards’)
The Tower is now complete.
Locked
Unlocked
INTERLOCK CLIP
Locked
3Position the Ladder Frame as
shown.
Clip the other end of the Horizontal
Brace (Red) onto the Ladder Frame. Fit
another Horizontal Brace onto the
lowest horizontal rung of the Frames to
square the tower. Ensure the Frames
are vertical and level by checking with
a spirit level and setting the
Adjustable Legs as required.
5Fit 2 Diagonal Braces (Blue) in
opposing directions between
the 1st and 3rd Rungs.
Fit an additional Ladder Frame and
Span Frame. Ensure the Frame
Interlock Clips are engaged.
6Add Stabilisers.
See note on Stabilisers.
7Fit 4 Diagonal Braces (Blue) in
opposing directions between
the 3rd and 5th Rungs and the
5th and 7th Rungs.
Locate a Trapdoor Deck on the 6th
Rung with the Trapdoor next to the
Ladder.
8Climb the Ladder and from the
protected position of the
Trapdoor, fit Guardrails to the
7th and 8th Rungs (in that
order), on both sides of the
Tower.
9When building beyond a 3.2 m
platform height Tower -
Continue to add Span and
Ladder Frames, Diagonal Braces
and Trapdoor Platforms as
shown in the previous steps.
Always add Horizontal
Guardrails from the protected
position within the Trapdoor.
10 Fit the Toeboards (see
instructions ‘Fitting Toeboards’)
The Tower is now complete.
850 ASSEMBLY
We recommend two persons are
used to build Boss Towers.
Always start building with the
smallest height frames at the base
of the tower:
’The procedure illustrated shows a tower
starting with a 4-Rung Frame’
1Push Castor onto Adjustable
Leg. Insert Adjustable Leg /
Castor assemblies into Frame
and lock castors.
(Alternatively use static Base Plates).
Tower Platform Height in Metres Frame of
Base
2.2 4.2 6.2 8.2 10.2 2 Rung
3.2 5.2 7.2 9.2 4 Rung
4Fix a deck on the 2nd Rung
with the Trapdoor next to the
Ladder.
Fix Guardrails on the 3rd and 4th
Rungs on both sides of the Tower.
2Clip Horizontal Brace (Red) onto
the vertical of the Span Frame,
facing claws outwards.
Frame will now be self-supporting.
Locking claws should be primed
before use, and released for
dismantling or relocation.
Locked
TIES
Ties should be used when the
tower goes beyond its safe height
- beyond the limits of the
stabilisers/outriggers or where
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 50.8 mm
diameter tube of the tower should
be used. Ideally ties should secure
to either face of a solid structure or
by means of anchorages.
The tie frequency may vary
depending on the application, but
they should, at a minimum, be at
every 4 metres height.
ERECTION
Check that all components are on site and that they are functioning correctly – See Quantity Schedule.
Ensure the ground on which the mobile access tower is to be erected and moved, is capable of
supporting the tower.
The MAXIMUM Safe Working Load (the combined weight of the user/s, tools and materials) that may be
placed on the Tower is the Total Weight less the Self Weight of the Tower.
EXAMPLE
A 1.45 m x 2.5 m Tower with a Platform Height of 4.2 m has a Self Weight of 201 kg.
950 kg 201 kg
TOTAL WEIGHT - SELF WEIGHT = 749 kg MAXIMUM Safe Working Load
The MAXIMUM Safe Working Load that may be placed on ANY Working Platform is 275 kg - This must be
evenly distributed over either one Trapdoor Platform (850), or a Fixed Platform and Trapdoor Platform (1450)
placed side by side.
Towers must always be climbed from the inside during assembly and using the built-in ladder provided
during use.
Adjustable Legs should only be used for levelling.
Do not use boxes or step ladders on the platform to gain additional height.
LIFTING OF EQUIPMENT
Tower components should be firmly secured by a reliable lifting material (eg rope), employing a reliable
Knot (eg clove hitch), to ensure safe fastening.
MOVEMENT
GENERAL NOTES TIES
USAGE ADVICE
The tower should only be moved by manual effort, and only from the base.
When moving the tower, beware of live electrical apparatus, particularly overhead, plus wires or
moving parts of machinery.
No personnel 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 fitted, they should only be lifted sufficiently above the
ground to clear ground obstructions. The height of the tower, when being moved, should not exceed
2.5 times the minimum base dimensions, or 6 metres overall height.
MAINTENANCE
All components and their parts should be regularly inspected to identify damage, particularly to welds. Lost or
broken parts should be replaced, and any tubing with indentations greater than 5mm should be put to one
side for manufacturer repair. Adjustable leg threads should be cleaned and lightly lubricated to keep them free
running.
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 (17 m.p.h.), cease working on the tower. If the wind becomes a
strong breeze, expected to reach 11.3 metres per second (25 m.p.h.), tie the tower to a rigid structure.
If the wind is likely to reach gale force, over 18 metres per second (40 m.p.h.), the tower should be
dismantled.
Wind Beaufort Beaufort Speed in Speed in
Description Scale No. m.p.h. m/sec.
Medium Breeze Raises dust and loose 4 8-12 4-6
paper, twigs snap off.
Strong Breeze Large branches in motion, 6 25-31 11-14
telegraph wires whistle.
Gale Force Walking is difficult. 8 39-46 17-21
Beware of open ended buildings which can cause funneling effect..
Do not abuse equipment. Damaged or incorrect components should never be used.
Raising and lowering components, tools, and/or materials by rope should be conducted within the tower 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 to other structures.
Beware of horizontal forces (eg power tools) which could generate instability. Maximum horizontal force 20
kg.
The stairway towers featuring an inclined staircase access are for use with personnel frequently carrying tools
and/or materials.
Mobile towers are not designed to be suspended - please refer to your supplier.
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