Min. Order: 5 Tones FOB Price:US $750-1300 / Ton Steel structure roof/building/project/engineer Safe and Easy to install. Pipe truss, Steel truss, Layer trussThis kind of steel structure products, with enviromental protected materials, is easy and fast in installation, and saves costs in time, labours and materials; what's more, practical, stable and safe in constructions.1. Certificate: ISO ...