Alloys of common metal; aluminum and its alloys; metal boards for ceilings, floors, roofings and walls; metal building materials, namely, ceiling boards, floor boards, roofing boards, exterior wall boards and interior wall boards; metal roofing panels; metal ceiling panels; wall panels of metal; reinforcing materials of metal for building purposes; metal joinery fittings; cast steel; cladding of metal for construction and building; common metals, unwrought and semi-worked, for further manufac...