Heavy-duty trucks with three, four, or five shelves. All-welded 12 gauge steel shelves provide plenty of space to transport your large loads. Also used as portable storage racks that can be moved for cleaning, or to different locations as your storage requirements change. Two rigid and two swivel casters with 6? x 2? phenolic wheels. Comfortable formed 1? tubular steel push handle. Shelves available flush or with 1-1/2? retaining lip. 3600 lbs. capacity.