... C120~C320, Z100~Z200 7)Different roof and wall panel: Single colorfull corrugated steel sheet0.326~0.8mm ... thick,(1150mm wide), or sandwich panel with EPS, ROCK WOOL, PU etc insulation thickness ... packing load in 40'OT, roof and wall panel load in 40'HQ! Putian steel structure system ... mybe you don't have any ideal about what/how to do for your warehouse/workshop,or this project is ...