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Articles, materials, or supplies that consist of only one of the items listed in paragraph (1) of this definition, except as provided in paragraph (2) of this definition. To the extent one of the items listed in paragraph (1) contains as inputs other items listed in paragraph (1), it is nonetheless a construction material.The listed items are:Non-ferrous metals;Plastic and polymer-based products (including polyvinylchloride, composite building materials, and polymers used in fiber optic cables);Glass (including optic glass);Fiber optic cable (including drop cable);Optical fiber;Lumber;Engineered wood; andDrywall.Minor additions of articles, materials, supplies, or binding agents to a construction material do not change the categorization of the construction material. *See* 2 C.F.R. Part 184.3.
Last updated November 21, 2023

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