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1. |
For gantry girders carrying electrically operated overhead travelling cranes, the lateral forces are increased by ____ for impact allowance. |
A. | 10% of weight of crab and weight lifted on the crane |
B. | 20% of weight of crab and weight lifted on the crane |
C. | 25% of maximum static wheel load |
D. | 50% of maximum static wheel load |
Answer» B. 20% of weight of crab and weight lifted on the crane | |