Non-metallic building materials, namely, plaster, mortar board, cement, timber, lumber, bricks, cement mixes, filling cement, glass bricks, glass panes, glass tiles, safety glass, glass panels, insulated glass, laminated flat glass and modified sheet glass; non-metallic rigid pipes for building; asphalt; pitch; bitumen asphalt; construction and worked timber; bricks; cement mix for building; cement partitions and building components, namely, slabs of cement; non-metallic transportable buildings; non-metallic monuments of stone, concrete, or marble; concrete; concrete building elements, namely, blocks, bricks, posts, slabs and panels; non-metallic exterior roll shuttering for concrete; mortar for building

Construction and repair of structures, namely, industrial complexes, works of art, buildings, and factories; construction of maritime and river installations, namely, bridges, abutments, bridge abutments, dikes, embankments, dams, mill ponds, river basins, tidal basins, holding basins and reservoirs; asphalting; rental of construction equipment; construction supervision and management of building site work; construction and repair information; demolition of buildings; masonry; plastering; scaffolding erection and repair

Engineering and surveying services; engineering services, namely, carrying out evaluations, appraisals, research work and writing reports in the fields of science and technology; scientific research; industrial research relating to civil and mechanical engineering in the fields of residential construction, construction of bridges, abutments, bridge abutments, stabilized structures on land, mechanical stabilization of land and structures, fills and embankments, retaining walls, dikes, tunnels, dams, mill ponds, river basins, tidal basins, holding basins, reservoirs and silos; chemical laboratories; testing of materials; technical project studies and research relating to civil and mechanical engineering, namely, studies in the fields of residential construction, construction of bridges, abutments, bridge abutments, stabilized structures on land, mechanical stabilization of land and structures, fills and embankments, retaining walls, dikes, tunnels, dams, mill ponds, river basins, tidal basins, holding basins, reservoirs and silos; construction consultation; technical research relating to civil and mechanical engineering in the fields of residential construction, construction of bridges, abutments, bridge abutments, stabilized structures on land, mechanical stabilization of land and structures, fills and embankments, retaining walls, dikes, tunnels, dams, mill ponds, river basins, tidal basins, holding basins, reservoirs and silos