19 Processed timber products and lumber namely better, shop, and cutting grade lumber; timber products namely manufactured, sawn, worked, semi-worked, rough-sawn, gauged, and dried timber; wood veneer, plywood and glue-laminated timber; building materials incorporating timber, namely, floor and ceiling panels, wood paneling, wall boards, wood moldings and shaped timber; floor panels and wall panels not of metal, fingerjoint studs, wood moldings used for building construction