SXJ550/32 is a 550-tonner bridge erecting machine and just like the other bridge erecting machines of the same series,speedy and has a concise operation procedure.The erection of 550t single line single box girder and 450t double line box girder can be done simultaneously.The machine can meet the requirements of small radius girder erection and cross-straddle girder erection,and the erection of girder with opening at both ends can be done conveniently.

　　The whole body of the machine can be hauled through a tunnel on a girder-transporting vehicle as the total height and the rear vehicle width can change.No major dismantling but shrinking the bridge erecting machine external overall dimensions is needed before going into the tunnel,and no assistance from large-scale hoisting machinery is needed after coming out of the tunnel as the bridge erecting machine can automatically recover its girder erection function and can conduct the erection of the first box girder conveniently before going in and after coming out of the tunnel.