simulated lumber made of plastic; simulated lumber made of composites of plastic; simulated lumber made of composites in varying degrees of various plastic resins and wood; non-metal simulated lumber; nonmetal architectural molding made of plastic; polypropolyne, polyvinyl chloride and polyethylene composed board material used as a lumber substitute; nonmetal posts, columns, rails, planks, stairs, stair treads, beams, joists, all made of plastic for construction purposes
Nonmetallic Building Materials