19 Framework, not of metal, for building; prefabricated, transportable buildings, not of metal; building materials, not of metal, namely, lumber for building; construction materials, not of metal, namely, lumber for building; huts, namely, transportable buildings of lumber; furrings of wood; concrete building elements, namely, concrete for building; wood, semi-worked; building timber; manufactured timber; chimneys, not of metal; windows, not of metal; doors, not of metal; props, not of metal, namely, wood beams; asphalt felt for building; porches, not of metal for building; wall claddings, not of metal, for building; wall linings, not of metal, for building; ceilings, not of metal; reeds being lumber for building; latticework, not of metal; reinforcing materials, not of metal, for building; shuttering, not of metal, for concrete; window frames, not of metal; door frames, not of metal; door casings, not of metal; staircases, not of metal; building panels, not of metal; prefabricated houses, not of metal; cladding, not of metal, for building