The use of conveyor belt driven self-unloading trailers has proven to be one of the most effective means by which to reduce the unloading time of bulk commodities, resulting in a strong market for companies that produce these types of trailers. One of the main producers of these trailers in the U.S. is TRINITY TRAILER MFG. INC. headquartered in Boise, Idaho.
The trailer can be parked on uneven ground. This is a great advantage over "tipping chassis" trailers that require flat ground. The frameless design allows the trailer to flex and twist as the trailer moves through different surfaces, due to this flex, the trailer will not break up as many rigid aluminium trailers do. Up to now, North American Stainless (NAS), Acerinox factory in U.S., has delivered more than 200 tonnes of austenitic stainless steel to Trinity Trailers, through the company Affiliated Metals.