girder

摘要

A girder, mainly for bridge type cranes, contains upper and lower belts connected by walls sequentially located along the longitudinal axis of girder with opposite slope of adjacent walls at an angle to the axis of girder. The angle is a parameter of the moment resistance of the cross-section of girder and is determined depending on the value of bending moment in the cross-section of girder and increases toward the centre of girder.