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About product and suppliers:
        Alibaba.com offers 561 parallel structure products. About 9% of these are metal building materials, 1% are steel structures, and 1% are aluminum profiles. 

A wide variety of parallel structure options are available to you, such as aisi, astm, and gb. You can also choose from steel structure bridge, structural roofing. As well as from heavy, light. And whether parallel structure is 6000 series, or q235. 

There are 561 parallel structure suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of parallel structure respectively. 

Parallel structure products are most popular in Domestic Market, Africa, and Southeast Asia. 

You can ensure product safety by selecting from certified suppliers, including 262 with ISO9001, 107 with Other, and 45 with ISO14001 certification.