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Building materials (non-metallic); non-metallic rigid pipes for building; asphalt, pitch and bitumen; non-metallic transportable buildings; monuments, not of metal.
structural steel products-namely, shapes, tanks, wire mesh, gates, doors, door frames, windows, culverts, guard rails, flood gates, stairs, gratings, raillings, hatches, building fronts and facia, flag poles, fabricated transmission towers, manhole covers, expansion joints and dowel assemblies, ornamental metal screens, trash intake screens for sewage plants and power plants, louver screens for sunshades, walkways, ladders, pipe columns, column guards, highway signs, conveyor framing