Building materials not of metal, namely, wood and wood derivatives and modified wood, namely, thermally treated lumber and semi-worked woods, chemically treated lumber and semi-worked woods, and semi-worked woods; [ balustrades; beams not of metal; ] [ non-metallic transportable buildings; ] [ floor boards not of metal; frameworks for buildings not of metal, namely, building, wall, door and window framing; ] building panels not of metal; [ building timber; caissons for construction work under...