Our Adjustable Height Steel Gantry Cranes provide the most flexible lifting solution of any style crane. The adjustable gantry can be moved to almost any location and can be easily adjusted to provide different lifting heights. Our gantries come with non-marking, durable phenolic casters to provide low rolling resistance and easy movement. The phenolic wheels roll smoothly, even over rough floor surfaces, and can withstand water, oil and most other chemicals.Adjustable Steel Gantry Cranes are pre-engineered for use with powered hoists. A factor of 15% of the crane capacity is allowed for the hoist and trolley weight with an additional 25% of the capacity allowed for impact, thus giving maximum capacity use of the crane. Hoist trolley not included. Product Specifications WIDTH30' HEIGHT MAXIMUM20' HEIGHT MINIMUM17' CAPACITY LBS6000 COLOR FINISHBlue ASSEMBLYUnassembled BRANDGorbel CONSTRUCTIONSteel FLANGE WIDTH INCHES9 I-BEAM HEIGHT INCHES24 MANUFACTURERS PART NUMBERAG-3-17/20-30 TYPEAdjustable Height USABLE WIDTH28' 5-1/2" WEIGHT LBS3780 WHEEL DIA. INCHES10 WHEEL TYPEPhenolic