19
Building materials (non-metallic), cement, asbestos cement, concrete, goods for road construction, slate, asphalt, brick, lime, raw chalk, rock crystal, sandstone for building, clay, earth for bricks, terra cotta, tar, granite, gypsum, macadam, marble, sand, schist, pitch, bitumen, gravel, limestone, building stone, quartz; Sheets and plates of synthetic material for marking out roads, crash barriers, not of metal, for roads, glass granules for marking out roads, binding material for road repair
35
Wholesaling or retailing of building materials (non-metallic), cement, asbestos cement, concrete, road making goods, slate, asphalt, bricks, lime, raw chalk, rock crystal, sandstone for building, clay, earth for bricks, terra-cotta, tar, granite, gypsum, macadam, marble, sand, schists; Wholesaling or retailing of pitch, bitumen, gravel, limestone, building stone, quartz, sheets and plates of synthetic material for marking out roads, crash barriers, not of metal, for roads, granules of glass for marking out roads, binding material for road repair
37
Construction of permanent buildings, roads, bridges, works of art, civil engineering works, earthworks, levelling; Construction of tunnels, underground structures, asphalting works; Road and service works, pipeline works; Road paving; Sanding; Supervision (management) of building works; Building demolition; Underwater construction; Quarrying and mining