6
Common metals and their alloys; Transportable structures of metal; Pipes and tubes of metal; Metal building materials, in particular sliding bearings, including for civil engineering structures and bridge building; Metal building materials; Securing devices of metal (building science); Buildings of metal; Metal railings for bridges; Building and construction materials and elements of metal; Metal building materials
17
Plastics in extruded form for use in manufacture, in particular for use as sliding materials or as parts of sliding bearings; Packing and insulating materials; Anti-friction bearings for construction; Insulation for building purposes; Vibration dampers; Vibration dampers of rubber
19
Building materials (non-metallic); Non-metallic rigid pipes for building; Non-metallic transportable buildings; Non-metallic building materials, In particular sliding bearings, including for civil engineering structures and bridge construction; Sliding elements, namely slide bearings, discs or plates; Buildings, not of metal; Structures, not of metal, for bridges; Securing devices, not of metal (building science); Bridge bearings [construction materials] not of metal; Stanchion stays (Non-metallic -); Bearings of plastic for seismic isolation of buildings; Expanded plastics for use in construction; Structural elements (Non-metallic -) for use in building