MATIÈRE

Non-metal building materials, namely, refabricated reinforced concrete structures, railway structures, crawl spaces, storage structures; buildings, transportable, not of metal; elements and groups of structures for public and private works, namely, non-metal ducts made from juxtaposed prefabricated elements; non-metal shelter structures comprising underground passages and tunnels; prefabricated elements not of metal for construction of the above-mentioned structures, namely, non-metal shores, supports and braces; support elements for the above-mentioned structures, namely, concrete pipe supports and non-metal construction elements, namely, supports