Heavy Duty. Rigid Underbracing affords maximum hook height. Self-aligning heavy load carrying capacity anti-friction bearings for 360° rotation with pressure grease lubrication. Heavy section structural mast supported top and bottom permits smaller floor loads. Top bearing connection may be attached to ceiling, over head truss or with proper bracket, supported from wall or column. These jib cranes are constructed in sections for ease of shipping and field installation. The overall height of themore jib can be varied to suit existing conditions. Above dimensions are for general reference only. For specific installation dimensions request certified drawing No. SD-800-7T. A 1/2" allowance has been included in the "C" dimension for field shim of upper mast bearing assembly. less