Non-metal building materials, namely, joists, floors, walls, shelving supports, braces; Non-metal floors; Non-metallic reinforcements for concrete and wood building construction, namely, plates, rods and bars; Prefabricated non-metal walls; Reinforcing materials, not of metal, for building

Joists of iron or steel; Metal pipe couplings and joints; Reinforcing materials of metal for building; Steel rebars, rods, and mesh used for strengthening and reinforcing concrete structures