Our Mast Type Jib Cranes are floor supported and top stabilized with no required foundation and are capable of 360 ° rotation via a top and bottom bearing assembly. The simple, efficient design of the Mast Type Jib makes it the most cost effective of our 360 ° rotation jib styles.The mast/beam connection eliminates the need for tie rods or knee braces found on other designs, thus permitting maximum trolley travel.Mast Type Jib Cranes are pre-engineered for use with powered hoists. A factor of 15% of the jib crane capacity is allowed for the hoist and trolley weight with an additional 25% of the capacity allowed for impact, thus giving full rated capacity use of the jib. Product Specifications LENGTH FEET20' HEIGHT FEET20' CAPACITY LBS10000 COLOR FINISHYellow ASSEMBLYUnassembled BASE DIAMETER OR DIMENSION INCHES12 x 15 BRANDGorbel CONSTRUCTIONSteel FLANGE WIDTH INCHES9 I-BEAM HEIGHT INCHES24 MANUFACTURERS PART NUMBERMT450-500-20-20 MAST DIAMETER INCHES27 TYPEMast Type Jib Crane - Drop Cantilever WEIGHT LBS4445