The test result shows that deflection of CFST truss girder is mainly attributed to deformation of shear-bending parts and much smaller than that of solid webgirder.
试验结果表明：钢管混凝土桁梁变形比实腹梁小很多且主要集中于边段；
2
The welding on the girderweb first before installation, transportation lashing hook.
安装前先将焊在主梁腹板上，运输时捆绑用的吊钩。
3
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.