Diamond Roll Up Door, Inc. is now producing the 7.5mm Duraplate roll up door for semi-trailers, box trucks, and step vans. The 7.5mm material provides a lighter weight and more durable solution for dry freight roll up doors used in the transportation industry.
The Duraplate material is a high density polyethylene (HDPE) core between two 0.013 galvanized steel sheets (80,000 psi yield) with a polyester baked on finish. Diamond was the original manufacturer of the 13mm Duraplate door (Evolution Door) introducing it to the market in the early 2000s. With increased fuel costs and emphasis to take weight out of the trailers and trucks the 7.5mm reduces the weight and still provides a product which is strong and does not absorb water and rot.