... steel bulding, metal building, modular house, steel frame for warehouse,workshop, garage etc, steel beams, other riveting and welding ... 5) Bracing: X or V or other type bracing made from angle, round pipe, etc 6) C or z purlin ... :Size from C120~C320, Z100~Z200 7) Roof and wall panel ... wheel pressure and min wheel pressure! prefab steel constrution warehouse made in China