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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:
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 8.
Angle of Stabiliser 1450 TOWER
Double width 1450 Towers Dimension X
Platform Length 1.8m Platform Length 2.5m
SP7 X= 3351 X= 3629
SP10 X= 4789 X= 5100
SP15 X= 5520 X= 5838
Stabiliser feet should form a square as shown in the diagram and
table above.
Quantity Schedule
1450 Width Towers
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:
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 175kg.
950kg — 180kg = 775kg 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 436kg.
950kg — 436kg = 514kg maximum safe working load
total weight self weight (users, tools and materials)
For greater heights and loads, consult Youngman for guidance.
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, 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.
NUMBER OF WORKING PLATFORMS ALLOWED
9
Quantity Schedule
1450 Width Towers
BALLAST: Internal/External Use
10
X
X
90°
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
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
Adjustable leg assembly 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
850 2 Rung Ladder Frame 1 1 1 1 1 1 1 1 1 1 1 1
850 2 Rung Span Frame 1 1 1 1 1 1 1 1 1 1 1 1
850 3 Rung Ladder Frame 1 1 1 1 1 1 1 1 1 1 1
850 3 Rung Span Frame 1 1 1 1 1 1 1 1 1 1 1
850 4 Rung Ladder Frame 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 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 Trap Door 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 and 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 and 2.7m Diagonal Brace (blue) 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 and 2.5m Side Toeboard 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.
11
Quantity Schedule
850 Width Towers
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