Working Platform
Assembly and Operating Manual
Page 23 of 52
BL 061 U Edition 06.2007
9.1.4.1
Determining the necessary number of counterweights and supporting forces for AB 450
Number of counterweights per beam (rule of thumb)
2
1
3
l
l
F
F
n
g
W
×
×
=
F
w
=
Winch traction force
2
1
54
l
l
n
×
=
F
g
=
Weight of one counterweight
(without taking into account the length
of rope and the roof extension)!!!
1
2
5
0
L2
L1
Abspannseil
F
w
Gegengewichte
A
(Supporting force)
B
Fig. 15 Supporting forces with AB 450 winch
Table 3:
Number of counterweights at 25 kg each
as well as supporting forces in kg (
A and/or B
) (per
beam) for winches with up to 450 kg traction force (AB 450 WINCH) with a rope length of 100 m
L1
L2
2.4m
2.6m
2.8m
3.0m
3.4m
3.8m
4.2m
4.4m
0.6m
A
[kg]
B
[kg]
14
716 / 1862
380
12
703 / 1832
333
11
693 / 1807
309
11
684 / 1785
311
9
669 / 1748
264
8
657 / 1720
241
7
648 / 1696
217
7
644 / 1686
218
0.8m
A
operating / in arrester case
B
platform on ground
18
837 / 2060
494
16
821 / 2021
447
15
808 / 1987
424
14
796 / 1958
400
12
777 / 1910
353
10
762 / 1872
306
9
749 / 1841
282
9
744 / 1828
283
1.0m
A
B
23
881 / 2181
618
21
862 / 2132
571
19
846 / 2091
523
18
831 / 2055
500
15
808 / 1995
428
13
790 / 1948
380
12
775 / 1910
357
11
768 / 1894
333
1.2m
A
B
28
925 / 2301
742
25
903 / 2243
670
23
883 / 2194
622
22
867 / 2151
599
19
839 / 2080
527
16
818 / 2025
454
15
800 / 1979
431
14
792 / 1960
407
1.4m
A
B
32
969 / 2422
841
30
944 / 2355
794
27
921 / 2267
721
25
902 / 2248
673
22
870 / 2166
601
20
845 / 2101
554
17
825 / 2048
481
17
817 / 2026
482
1.6m
A
B
34
984 / 2466
893
32
959 / 2401
845
29
938 / 2344
772
26
902 / 2251
701
23
873 / 2177
628
20
851 / 2117
555
19
841 / 2092
531
1.8m
A
B
36
997 / 2504
945
33
973 / 2441
872
29
933 / 2336
775
26
901 / 2253
703
23
876 / 2186
630
22
865 / 2157
606
2.0m
A
operating / in arrester case
B
platform on ground
32
964 / 2421
849
29
929 / 2330
777
26
901 / 2255
704
24
889 / 2223
655
The supporting forces must be halved to determine the wheel forces.
1
.2
3
m
Without
bracing rope
W
it
h
b
ra
ci
n
g
r
o
p
e
Bracing rope
Counterweights