Gorbel's I-beam Jibs are ideal for heavier loads from 1 to 5 tons (heavier capacities available, contact us).  They are also available in motorized or manual rotation. Provide for dramatically reduced forces to supporting structures. Floor-supported, top-stabilized cranes capable of 360° rotation via a top and bottom bearing assembly. Typically do not require special foundations. Capacities from 1/4 ton to 5 tons, with heights up to 20 ft. and spans up to 20 ft. Full Cantilever and Drop Cantilever styles. Utilize I-beam boom assemblies for heavier capacities and longer spans.