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About product and suppliers:
        Alibaba.com offers 2,689 portal frame steel structure products. About 58% of these are steel structures, 13% are warehouses, and 5% are metal building materials. 

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

There are 2,691 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 961 with ISO9001, 578 with Other, and 307 with OHSAS18001 certification.
        
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