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About product and suppliers:
        Alibaba.com offers 626 composite structural beams products. About 40% of these are other fiberglass products, 5% are steel h-beams. 

A wide variety of composite structural beams options are available to you, such as astm, jis, and bs. You can also choose from q235, q235b, and q345b. As well as from free samples. 

There are 626 composite structural beams suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of composite structural beams respectively. 

Composite structural beams products are most popular in Domestic Market, North America, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 322 with ISO9001, 126 with Other, and 29 with ISO14001 certification.