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We are the leader carport manufacturer in China. carports.com.cn Aluminum Alloy Profile Choices: 1)Powder Coated Aluminum Alloy Profiles 2)Electrophoresis of Aluminum Alloy Profiles 3)Oxidation of aluminum alloy profiles Co-extrued polycarnate roof coated anti-UV(*8%) ,with grey,blue and dark colors,which is **0 times stronger than glass. Snow load of roof is up to *0cm per square meter. The stay bar will be more safer when snow is more than *0 cm thickness. Through testing by national center for quality supervision and testing of fire building materials, each behavior of the material confrorm to standardof difficult flammability material,polycarbonate sheet is reted Class B1 according to QB********7. Our Testing (Load-bearing of Aluminum Alloy Structure) The Testing for ***0mm and ***0mm wide carports,**0Kgs heavy steel bears on one side. All make 3 times testing, Max **0mm goes down for ***0mm wide carport and max **0mm for ***0 mm wide carports. No Rusting Forever High quality **6# stainless steel screws,aluminum connectors and aluminum down pipes. No resting,no peeling and no fading forever ****6m/s Wind Resistance The special design& unique profiles supply a strong structure carport to resist ****6 m/s wind. **0~***0N/m2,(*1~**3 kgf/m3) Snow load on roof !