This fully welded cart has a maximum load capacity of 3,000 lbs. and has big and thick steel components. This dolly can hold up to 18 drywall sheets of 5/8-inch gypsum. The angled deck reduces tipping of sheetrock and the full wrap-around bumper with rounded corners helps to prevent wall damage. This sheetrock drywall sheet carrier has 8-inch, heavy-duty polyurethane, caster wheels built around a polypropylene core, including one directional lock and one brake.The unit is finished in a rust-resistant powder coating that also protects the surface against abrasion, scratches, and other damage. This rolling cart on wheels is ANSI certified, CSA listed, and OSHA compliant.