Boards of wood; Chemically treated wood, namely, wood beams, wood boards, wood joists, wood rafters, wood siding, wood tile floors and flooring, wood trim, wooden beams, wooden flooring, wooden railings, and wooden wainscoting, all of the above containing a fire retardant chemical; Laths, not of metal; Non-metal laths; Planks; Plywood; Semi-worked wood; Wood blocks; Wood boards; Semi-worked woods; Wood sheets for arts and crafts