Assembling the beam segment by segment is a great mature construction technology in abroad, and it has been very popular in bridge engineering.

The device is a fulcrum structure which can carry out three-dimensional position adjustment of a steel box girder and guarantee a beam segment to move freely in a plane.

Finite beam segment method is an effective way to solve the shear lag problem of statically indeterminate structure, such as continuous girder with constant cross section etc.