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BoSS 850 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 Internal Use
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
0.6m End Toeboard 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
Toeboard 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 4
SP10 Telescopic Stabiliser 4 4 4 4 4 4 4 4 4 4 4 4 4
SP15 Telescopic Stabiliser 4
1.8m TOWER Total Self-weight (kgs) 72 79 106 126 139 146 151 172 186 204 210 230 243 250 270 276 289 296 301 321 335 341 347
2.5m TOWER Total Self-weight (kgs) 84 90 117 143 158 165 172 198 225 233 239 264 280 286 382 318 334 341 347 372 488 395 401
See pages 14 and 30 for stabiliser positions.
Quantity Schedule
850 Width Towers
12
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 — 410kg = 540kg maximum safe working load
total weight self weight (users, tools and materials)
For greater heights and loads, consult Youngman for guidance.
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 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.
Quantity Schedule
850 Width towers
NUMBER OF WORKING PLATFORMS ALLOWED
13
There is no requirement for ballase on 850 towers if using stabilis-
ers as detailed in the table on page 12
MOBILE OUTRIGGERS
MP16 mobile outriggers can be used instead of SP15 telescopic
stabilisers respectively, as detailed below.
Mobile outrigger kits comprise:
STABILISERS
To improve rigidity, larger stabilisers can be used at a lower level
than shown in the table on page 12.
Single Width 850 Towers Dimension X
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.
Quantity Schedule
850 Width Towers
BALLAST: Internal/External Use
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
14
X
X
90°
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