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About product and suppliers:
        Alibaba.com offers 494,551 steel frame products. About 4% of these are prefab houses, 2% are steel structures, and 1% are metal building materials. 

A wide variety of steel frame options are available to you, such as steel, galvanized sheet, and aluminum alloy. You can also choose from free samples, paid samples. 

There are 493,898 steel frame suppliers, mainly located in Asia. The top supplying countries are China (Mainland), United States, and Pakistan, which supply 99%, 1%, and 1% of steel frame respectively. 

Steel frame products are most popular in North America, Domestic Market, and Southeast Asia. 

You can ensure product safety by selecting from certified suppliers, including 179,886 with ISO9001, 81,791 with Other, and 22,186 with ISO14001 certification.