1.Wide Application; 2.Shorten Construction Period; 3.Durability and Convenient Repair; 4.Artistic Appearance and Practical; Materials List: NO.Project namespecificationFirstSteel structure system 1steel joist,studQ235B/welding H shaped steel2purlinC160x70x20x2.0/2.3 ,,,3blockingφ204tie rodφ108*3.0/φ32*1.55pull strapφ10round iron6embedded partsΦ25,,7steel eaves gutterthick 3.08steel structure ...