... Q235 & Q345 Certificate:ISO9001:2000 ,ISO14001:2004 A new stable Steel structure warehouse Steel plant mainly ... plant, the basic steel roof trusses are now a), steel roof. And pay attention to steel ... single tile (color steel tile). The second is a compositeplate (polystyrene, rock wool, polyurethane). (Two layers ... of foam tile middle of a detour to play the role of cool, but ...