Manitowoc Grove RT540E Operator's Manual page 38

SAFETY INFORMATION
• Wind Drag Coefficient Cd = 1.3
the wind resistance area of load can be estimated as
Awr = Ap x Cd = 15.25 x 1.3 = 19.83 m
(load)
Refer to the above Lifting Limits at wind speed V(z)
> 13.4 m/s and ≤ 20.1 m/s. Comparing the load and wind
resistant area to the allowable:
• Is the load to be lifted less than allowable load?
8,000 kg ≤ 12,040 kg
• Is Awr less than Awr
(load)
2 2
≤ 14.45 m
19.83 m
2-16
2
YES
?
(allow)
NO
Published 01-15-2016, Control # 526-01
RT540E OPERATOR MANUAL
Conclusion: This load is NOT permissible to lift in wind
speed up to 20.1 m/s, but permitted to lift at a reduced wind
speed calculated as follows:
Ratio = 1.37
From Table 2-5, the maximum permissible wind speed at
ratio of 1.37 (rounded to next higher table value of 1.4) is
17.0 m/s.
Conclusion: This load is permissible to lift in wind speed up
to 17.0 m/s only.