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
I
NTERNAL 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
LADDERSPAN
PLATFORM HEIGHT
2.2 m
3.2 m
4.2 m
5.2 m
6.2 m
7.2 m
8.2 m
9.2 m 10.2 m
Lift 1.0 m
1.8 m SIDE TOEBOARD
2
2
2
2
2
2
2
2
2
1.2 m END TOEBOARD
2
2
2
2
2
2
2
2
2
TOEBOARD HOLDER
4
4
4
4
4
4
4
4
4
1.8 m FIXED DECK
1
1
1
1
1
1
1
1
1
1.8 m TRAPDOOR DECK
1
2
2
3
3
4
4
5
5
1
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
1.45 m 2-RUNG LADDER FRAME
1
1
1
1
1
1
1.45 m 2-RUNG SPAN FRAME
1
1
1
1
1
1
1.45 m 4-RUNG LADDER FRAME
1
2
2
3
3
4
4
5
5
1.45 m 4-RUNG SPAN FRAME
1
2
2
3
3
4
4
5
5
150 mm CASTOR WHEEL
4
4
4
4
4
4
4
4
4
ADJUSTABLE LEG
4
4
4
4
4
4
4
4
4
SP10 TELESCOPIC STABILISER
4
4
4
4
4
4
4
4
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
I
NTERNAL 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
LADDERSPAN
PLATFORM HEIGHT
2.2 m
3.2 m
4.2 m
5.2 m
6.2 m
7.2 m
8.2 m
9.2 m 10.2 m
Lift 1.0 m
2.5 m SIDE TOEBOARD
2
2
2
2
2
2
2
2
2
1.2 m END TOEBOARD
2
2
2
2
2
2
2
2
2
TOEBOARD HOLDER
4
4
4
4
4
4
4
4
4
2.5 m FIXED DECK
1
1
1
1
1
1
1
1
1
2.5 m TRAPDOOR DECK
1
2
2
3
3
4
4
5
5
1
2.5 m HORIZONTAL BRACE (RED)
6
10
10
14
14
18
18
22
22
4
2.7 m DIAGONAL BRACE (BLUE)
3
5
7
9
11
13
15
17
19
2
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
1.45 m 4-RUNG LADDER FRAME
1
2
2
3
3
4
4
5
5
1.45 m 4-RUNG SPAN FRAME
1
2
2
3
3
4
4
5
5
150 mm CASTOR WHEEL
4
4
4
4
4
4
4
4
4
ADJUSTABLE LEG
4
4
4
4
4
4
4
4
4
SP10 TELESCOPIC STABILISER
4
4
4
4
4
4
4
4
TOWER (SELF-WEIGHT) kg
120
185
201
243
258
313
328
370
385
42
0.85 m X 1.8 m
INTERNAL/EXTERNAL USE
I
NTERNAL 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
LADDERSPAN
PLATFORM HEIGHT
2.2 m
3.2 m
4.2 m
5.2 m
6.2 m
7.2 m
8.2 m
9.2 m 10.2 m
Lift 1.0 m
1.8 m SIDE TOEBOARD
2
2
2
2
2
2
2
2
2
0.6 m END TOEBOARD
2
2
2
2
2
2
2
2
2
TOEBOARD HOLDER
4
4
4
4
4
4
4
4
4
1.8 m TRAPDOOR DECK
1
2
2
3
3
4
4
5
5
1
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
1.45 m 2-RUNG LADDER FRAME
1
1
1
1
1
1
1.45 m 2-RUNG SPAN FRAME
1
1
1
1
1
1
1.45 m 4-RUNG LADDER FRAME
1
2
2
3
3
4
4
5
5
1.45 m 4-RUNG SPAN FRAME
1
2
2
3
3
4
4
5
5
150 mm CASTOR WHEEL
4
4
4
4
4
4
4
4
4
ADJUSTABLE LEG
4
4
4
4
4
4
4
4
4
SP10 TELESCOPIC STABILISER
4
4
4
4
4
SP15 STABILISER
4
4
4
4
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
I
NTERNAL 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
LADDERSPAN
PLATFORM HEIGHT
2.2 m
3.2 m
4.2 m
5.2 m
6.2 m
7.2 m
8.2 m
9.2 m 10.2 m
Lift 1.0 m
2.5 m SIDE TOEBOARD
2
2
2
2
2
2
2
2
2
0.6 m END TOEBOARD
2
2
2
2
2
2
2
2
2
TOEBOARD HOLDER
4
4
4
4
4
4
4
4
4
2.5 m TRAPDOOR DECK
1
2
2
3
3
4
4
5
5
1
2.5 m HORIZONTAL BRACE (RED)
6
10
10
14
14
18
18
22
22
4
2.7 m DIAGONAL BRACE (BLUE)
3
5
7
9
11
13
15
17
19
2
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
1.45 m 4-RUNG LADDER FRAME
1
2
2
3
3
4
4
5
5
1.45 m 4-RUNG SPAN FRAME
1
2
2
3
3
4
4
5
5
150 mm CASTOR WHEEL
4
4
4
4
4
4
4
4
4
ADJUSTABLE LEG
4
4
4
4
4
4
4
4
4
SP10 TELESCOPIC STABILISER
4
4
4
4
4
SP15 STABILISER
4
4
4
4
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
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