The trailer's exterior finish must deflect the effects of weather. Manufacturers use automotive processes to bond paint to metal walls. All exposed steel should be painted, and the subframe on all trailers should receive a protective undercoating. Through computer simulation, we test the strength and structural integrity of our designs before we begin the manufacturing process. A prototype built after computer testing is then tested on the road.
Most manufacturers offer warranties of up to seven years on certain structural components.
Other than that, few cite any industry regulation. We meet annually and exchange information with our competitors and the manufacturers that supply our materials. The NATM is not a regulatory agency, but it does offer a voluntary manufacturing plant inspection service to its members. One of the more important safety systems of a trailer is the electrical system that powers the brakes and exterior and interior lights. Wiring must be installed properly, and ideally with no wires exposed to the elements.