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About product and suppliers:
        Alibaba.com offers 2,543 portal frame steel structure products. About 51% of these are steel structures, 17% are warehouses, and 8% are prefab houses. 

A wide variety of portal frame steel structure options are available to you, such as aisi, gb, and astm. You can also choose from structural roofing, steel fabricated house, and steel workshop. As well as from light, heavy, and sheds & storage. And whether portal frame steel structure is free samples, or paid samples. 

There are 2,548 portal frame steel structure suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Turkey, and Singapore, which supply 99%, 1%, and 1% of portal frame steel structure respectively. 

Portal frame steel structure products are most popular in Africa, Oceania, and South America. 

You can ensure product safety by selecting from certified suppliers, including 976 with ISO9001, 446 with Other, and 162 with ISO14001 certification.