Steel prefabricated house, Minimum Steel Quantity:Q235,Q345, High Construction ... sheet 0.326~0.8mm thick,(1150mm wide), or sandwich panel with EPS, ROCK WOOL, PU etc insulation thickness ... skylight belts, Ventilators, Down pipe, Galvanized gutter, etc 9) Surface:Two layers of Anti-Rust Paint10) Packing:Main ... load on roof (KN/M2) 2)Wind speed (KM/H) 3)Snow load (KG/M2) - If Applicable4)Earthquake ...