The interior comes standard lined with 3/8″ plywood. Coupled with the steel wall studs on 16″ centers, these sides are ideal for mounting the shelves, racking, and pegs that contractors, roofers and landscapers need. A full range of contractor options are available on these trailers, including aluminum roof racks and access ladders, spring assisted cargo trailer ramp doors, aluminum stone guarding checkerplate, generator and fuel doors and much more. There are many electrical options as well for interior and exterior plugs to provide power to your power equipment and battery chargers.