Gantry Crane
Gantry cranes run on rails at ground level instead of on runway beams, so they need no building structure along the travel. A full box girder gantry has an A-frame leg at each side and suits outdoor yards, storage bays and precast or stock handling. A semi gantry crane uses one leg and one existing runway, which is useful where only part of the bay can take a new track. The foundation and yard bearing capacity are part of the decision.
