How to install girders for beam launcher?

The beam launcher integrating carrying and installing girders can be installed on the abutment.

Beam launcher

Girder installation: install rear part of beam launcher below the abutment, then install lateral sliding track, put main girder of beam launcher on the pier with crane for transverse moving to install girders, then put beam launcher on the girder carrier and sleepers for support, move rear part of beam launcher backward 8m, place and stable the front part of beam launcher with crane for installing girders; after finishing girder installation and beam launcher assembly, start longitudinal moving for girder installation.

To install girders at a reverse direction, just change the position of front leg and rear leg.