This paper introduce the calculational program of coping elevation for free plate girder curve bridge and resolve the handworked calculational defect, it will useful for improving work efficiency.

The text detailedly introduced crown block, running system, availability work period of bridge girder erection equipment and improve case for precast beams install.

As a new installation method for big structures, double girder integral lift is mainly composed of fixed girder, moveable girder, work anchor, moveable anchor, jacks and guide rail.