Girder Shifting and Launching

The job comprised launching of seven numbers of precast concrete girder sections. Each girder weighed between 120-150 tons with span varying from 33.5 meters to 37.5 meters. The other job included, shifting of cast in situ concrete girders by sixty meters from stacking to the erection point.  A launching gantry is a special-purpose mobile gantry crane used in bridge construction. It is used to install precast box girders in highway and high-speed rail bridge construction projects. The SLJ908 is a machine that can carry, lift, and place sections of track, connecting pillars by heavy stone blocks.

Sequence of Operation during Launching- Assembly of Launching Girder is placed on the top of the pier cap. Segments are lifted by the lifting Beam. Hang the segments by vertical suspender on the Sliding beam. Stressing of Cable is done. After Prestressing, the load is transferred to the bearing. A launching gantry is a special-purpose mobile gantry crane used in bridge construction. It is used to install precast box girders in highway and high-speed rail … etc.