"Loading operations will be safer and easier with the 36"" L x 63"" W HD Ramps Lightweight Aluminum Dock Board. Engineered to weigh less than Bluff or Guardian options, this heavy-duty dock board supports up to 20,000 lbs. It’s manufactured from rust-proof aluminum with a commercial-grade epoxy grit coat surface for ultimate traction in all weather conditions. The knife foot smooths the transition from ground to ramp, and a 72” lifting chain facilitates moving the dock board with a forklift. This dock board is suitable for a 3” height differential."