Steelmaster Adco rv covers are fire resistant and maintenance free. They are available in peaked-roof or Quonset-style, with overhead or sliding doors for vehicle entry, service doors, ventilators, windows, and skylights. Buildings can be custom-designed to meet individual needs.Steel buildings in the traditional peaked-roof style can be obtained from Miracletruss. The main frames are of steel and set in simple concrete piers. The frames feature pre-positioned, welded steel clips designed for easy installation of standard-length lumber for the balance of the roof and sidewall framing.