Single girder or double girderwalking crane

The single girder or double girder walking cranes are designed for particular assembly use in large industries with boom realised by a box girder or a unified section girder, connected with the supporting structure to the running heads with high resistance bolts. The cranes have running mechanisms with self-braking motors and progressive braking start-up, which ensure the perfect and smooth movement of the boom. The cranes may have rope and/or chain pulley tackle.