overhead crane girder

基本解释

In recent years some new profile steels are used for main girder of domestic made electric single girder overhead travelling crane.
近年来国内电动单梁起重机主梁采用一些新截面型式。
Cracks occurred in the main weld joining the web and upper wing panel of an overhead crane girder of I-section, some of which have expanded to the structure material and even led to girder fracture.
桥式起重机采用工字形截面作为主梁，使用多年后该结构形式的主梁上翼缘板和腹板连接的主焊缝及母材多处产生裂纹，甚至发生主梁断裂事故。
The formula under given fracture length is verified by fatigue test datas of welded box girder on overhead travelling crane.
并用桥式起重机焊接箱形梁的疲劳试验数据，对给定裂纹长度时构件疲劳可靠度的计算公式进行验算。