19
Building materials (non-metallic); non-metallic rigid pipes for building; asphalt, pitch and bitumen; non-metallic transportable buildings; monuments, not of metal.
non-metal construction materials in the nature of load supporting mats of plastic and wood used to create temporary roadways, travel surfaces, drill rig platforms, bridges, building foundations, trusses, and slipways; non-metal construction materials in the nature of load supporting mats of plastic and wood used to create decking; non-metal construction materials in the nature of load supporting mats of plastic and wood used to create temporary travel surfaces and provide erosion control, all for use in environmental remediation
20
Furniture, mirrors, picture frames; goods (not included in other classes) of wood, cork, reed, cane, wicker, horn, bone, ivory, whalebone, shell, amber, mother-of-pearl, meerschaum and substitutes for all these materials, or of plastics
non-metal mats of plastic and wood for use as load support surfaces in the utility and construction industries, namely, for use in supporting and stabilizing cranes, draglines, excavators, and other heavy equipment; non-metal mats of plastic and wood for use as load support surfaces in the utility, construction, and pipeline industries, namely, for use as pipeline skids and/or for use to protect ground or concrete surfaces; non-metal mats of plastic and wood for use as load support surfaces in the utility and construction industries, namely, for temporary use as cribbing; non-metal mats of plastic and wood for use as load support surfaces in the utility and construction industries, namely, for temporary use to protect liners in secondary containment from spills