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This specification does not apply to crawler-type or construction-type cranes (which typically follow other standards like AWS D14.3 or D15.2 for rail applications).

A weld that passes D1.1 may still fail under the dynamic, reversing loads of a crane. For example, D14.1 has more stringent requirements for impact toughness (Charpy V-notch testing) because a cold crack on a hook is far more dangerous than on a building column. aws d141 pdf full