19 Lumber; manufactured timber; chemically treated lumber; plywood; chemically treated plywood; wood, namely, plywood, lumber, wood siding, building timber, glulam being glued laminated lumber, and laminated veneer lumber; chemically treated wood, namely, plywood, lumber, wood siding, building timber, glulam being glued laminated lumber, and laminated veneer lumber; chemically treated wood, namely, plywood, lumber, wood siding, building timbers, glulam being glued laminated lumber, and laminated veneer lumber impregnated with fire retardant chemicals; chemically treated wood, namely, plywood, lumber, wood siding, building timbers, glulam being glued laminated lumber, and laminated veneer lumber treated with fire retardant chemicals; wood structural building panels, cross laminated timber; engineered wood products, namely, wood beams and wood joists; laminated veneer lumber; roofing boards of wood; nonmetal building products, namely, shingles and shakes being wooden shingles