| http://www.w3.org/ns/prov#value | - ment applies to all construction materials made primarily of steel or iron and used in infrastructure projects such as transit or maintenance facilities, rail lines, and bridges.??? These items include, but are not limited to, structural steel or iron, steel or iron beams and columns, running rail and contact rail. 49 CFR 661.5(c).??? After the steel and iron requirements are satisfied, FTA trea
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