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What is the maximum vertical deflection allowed for a gantry girder where the cranes are manually operated?

What is the maximum vertical deflection allowed for a gantry girder where the cranes are manually operated? Correct Answer L/500

The vertical deflection of gantry girder where the cranes are manually operated should not exceed L/500, where L is the span of gantry girder. The maximum vertical deflection allowed for a gantry girder where the cranes are travelling overhead and operated electrically upto 500kN is L/750 and operated electrically over 500kN is L/1000. When gantry girders carry moving loads such as charging cars, the deflection should not exceed L/600.

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