... claddingLight steel structure use efficient light thin wall material (corrugated sheet or sandwich panels).Owing light weight ,high strength ... materialsSemi-transparent skylight belts, Ventilators, down pipe etc .Corrugated sheets, sandwich panel (EPS,ROCK WOLL,GLASS WOOL) 5.AccessoriesSemi- ... and location*Roof and wall material ,sandwich panel or corrugated steel sheet*Purlin type C or Z3.Type*size ...