Adjustable Height Aluminum Gantry Crane, 10’W x 9’6″-12’H, 4,000 lb. Capacity – AHA-4-10-12 High-strength, corrosion resistant all-Aluminum Gantry Crane is ideal for use outdoors or in wet environments. Lightweight construction allows for easy movement and height adjustment in 6″ incrementswithout the use of a forklift. Pin connectors and I-Beam mounting plate allowsingle person set up and disassembles in minutes. Includes 2 straps to transport in one neat package. 54″ Base Depth with four durable 4-position swivel lock phenolic wheel casters. Note: Use Crane to Lift Loads only.**Height is measured from underside of I-Beam to Floor NOTE: All gantries should be inspected frequently to insure safe operation. Final testing and inspection is left to end user after final assembly has been completed. For further details see ASME B30.17.