Building materials made principally of common metal; Building materials of metal; Metal building materials; Prefabricated building materials (metal); Metal hardware for buildings

Acoustic building materials (other than for insulation); Building materials, not of metal; Builders' hardware of non-metallic materials; Non-metallic building materials; Non-metallic building materials having acoustic properties; Non-metallic building materials having insulating properties; Non-metallic building materials having sound deadening properties; Non-metallic building materials having thermal insulation properties