In a gantry (crane) girder, the top flange is designed to resist:
Choose the correct answer
Vertical wheel loads only
Lateral (horizontal) crane surge loads — top flange has biaxial bending from vertical + horizontal loads
Temperature forces only
Foundation reactions
Correct Answer
B. Lateral (horizontal) crane surge loads — top flange has biaxial bending from vertical + horizontal loads
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Gantry girder top flange: resists lateral (horizontal) wheel surge (from crane travelling, braking) = 10% of lifted load (IS 875 Part 5 or IS 800). Bottom flange: resists bending from vertical wheel loads. Top flange also carries biaxial bending. Typically designed as I-section + channel (cap channel) for lateral stability against crane surge.
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