... easy installation, stable structure, earthquake proofing, energy conserving and environment protection.Steel structure workshop included the main structure( steel ... , for example, steel bracket, bolts, self-taping screw, rivet, inter and outer cullis, rainspout, trimming sheet, glass cement, etc. ... you have any inquiry, pls be free to contact us, and many thankscertificate: ISO 9001, ISO 9004