... rockwool,metal. 2. cheap, economical building material 3.used for dorm, office, warehouse, fence, factory,workshop Widely used in ... common steel structure and storey adding projects. e.g. adding storey to small steel structure ... ,950mm,1050mmLengthCan be customizedThickness of the panel30-200mmMaterial Of Top/Back SheetCorrugated Color Steel Sheet(0. 326mm,0.376mm ...