Non-metal construction materials, namely beams, bricks, ceiling panels, cement mixes, ceramic shapes for use in refractory furnaces, concrete blocks, concrete bricks, concrete slabs, concrete and earthenware drain pipes, earthenware tiles, fiberboard, fireplace bricks, fireplace mantels, fireplace surrounds, forms for use in casting, hardboard, limestone, mortars, pitch, plaster, roofing cement, roofing felts, stones, wall boards; unshaped ceramic masses and shaped ceramic workpieces, clay, m...