LOADING
Question
The vertical deflection of a gantry girder of span L with manually operated cranes should not exceed 
A.
L/250
B.
L/500
C.
L/750
D.
L/1000
Answer ( Option B)

L/500

Solution

  Type of crane Limiting or Maximum Deflection
(a) Where the cranes are manually operated L/500
(b) Where the cranes are overhead travelling and operated electrically upto 500 kN or 50 ton L/750
(c) Where the cranes are overhead travelling and operated electrically more than 500 kN or 50 ton L/1000
(d) Other moving loads, such as charging cars, battery trolley etc. L/600
  Where L = Span of the gantry girder  

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