6
Ceilings; Joist clamps of metal; Joists of iron or steel; Frameworks of metal for ceilings; Metal building materials for ceilings; Metal joists; Metal building materials; Metal building materials; Flashing of metal, for building; Steel building materials; Refractory construction materials of metal; Building materials (Metal -) in the form of sheets; Building materials (Metal -) in the form of sheets; Building materials (Metal -) in the form of sheets; Building and construction materials and elements of metal
19
Joists, not of metal; Structural support joists, not of metal; Concrete building materials; Building materials consisting of glass; Coatings [building materials]; Building materials (non-metallic); Intumescent construction materials; Building materials consisting of glass; Refractory construction materials, not of metal; Construction materials of natural stone; Building blocks incorporating insulating materials; Non-metallic building materials; Building materials made of rock fibres; Construction materials of artificial stone; Lime building materials; Roof construction materials (Non-metallic -); Non-metallic building materials having acoustic properties; Building materials made of rock fibres; Building materials of plastics material; Fiber reinforced plastic construction materials; Building and construction materials and elements, not of metal; Non-metallic building materials for screeding; Woven mats (Non-metallic -) for use as geotextile materials for building purposes
35
Advertising of building materials; Advertising of building construction services; Sale of building materials
37
Construction of ceilings; Construction of reinforced concrete structures; Concreting; Concrete repairs