The Adjustable Height Aluminum Gantry Crane AHA-6-10-10 combines lightweight and rigid- sturdy construction into one unit. The all aluminum construction of this gantry crane makes it corrosion resistant and perfect for outdoor use. The lightweight I-Beam allows height adjustment without the need of a hoist or fork truck. All pined connections make it possible for single person set up and take down in just minutes. Included are two straps- allowing one person to transport the gantry crane in one neat package. Unit comes standard four position locking swivel casters with roller bearings. Locks the rigging in 1 of 4 positions; you can set the wheels and push the gantry crane forward- back- left or right. There is an optional Total Locking Casters that lock the rigging in any position and locks the wheel from rotating. 10' x 10' Specifications Size. 6000 lb Capacity. Dimensions: 132" H x 64.6875" W x 120" L. 369 lb Weight.