6
building elements, Other than fittings, of metal; Construction materials and building elements, Other than fittings, of metal; Prefabricated building elements, Other than fittings, of metal; Prefabricated building elements, Other than fittings, of metal
19
Building components of wood; Construction elements of plastic; Concrete building elements; Structural elements (Non-metallic -) for use in building; Building and construction materials and elements made of wood and artificial wood; Building and construction materials and elements, not of metal; Building and construction materials and elements made of sand, stone, rock, clay, minerals and concrete; Building and construction materials and elements made of pitch, tar, bitumen or asphalt; Prefabricated building components (Non-metallic -); Prefabricated building elements (Non-metallic -) for on site assembly; Manufactured building elements (Non-metallic -)
37
Installation of prefabricated building elements
40
Custom assembling of materials for others; Custom manufacture of prefabricated buildings; Custom manufacture of prefabricated construction elements