steel building 1,short construction time 2,durable 3, ... design software and strict design design attitude .12) short delivery time About our products Application Workshop ,warehouse, ... :GB 50017-2003*Technical code of cold-formed thin -wall steel structure :GB50018-2002*Load code for the ... corrugated galvanized steel sheet with different color 2)Internal wall panel : (below is selectable )* 50mm,75mm, ...