Classification Information
Floorboards; Limestone; Busts of stone, concrete or marble; Ceramic floor tiles; Clay flooring; Concrete bollards; Crash barriers not of metal; Facing mortar; Facing plaster; Floor panels not of metal; Folding doors, not of metal; Girders, not of metal; Glass bricks; Glass door lites; Glass mosaics for use in building construction; Glass tiles; Insect screens not of metal; Memorial plaques of stone; Wooden floor boards
Nonmetallic Building Materials