6
Steel pipe, pipes of metal, flanges, piping components
19
Building and construction materials, namely, brick, concrete pipe; building materials (non-metallic); non-metallic rigid pipes for building; pre-cast concrete, pre-stressed concrete architectural and structural building components and structures, namely, box culverts, drainage structures, double T floor, roof and wall units, architectural panels, slabs, spandrel and fascia panels, columns, beams, hollow-core planks, parking structure panels; autoclaved aerated concrete blocks; non-metallic water pipes, pipes of cement or polyethylene; concrete gravity pipe; concrete pressure pipe, bar-wrapped pressure pipe; conduits; roofing tile, and also including building materials containing steel elements; construction materials, namely, composite panels comprised primarily of a reinforced cement core that is mechanically bonded to steel sheets on both outer surfaces for use in barriers and doors; walling systems, chimney, roofing and flue systems
37
Steel construction works; concrete construction works; construction using bricks and/or aircrete blocks; construction and repair of facilities, buildings, structures, and roads; construction and repair; technical consultation in the field of building construction
42
Design and planning of paving systems, drainage systems, surface water control systems, heat exchange systems, systems for channeling, collection, filtration and/or utilization of water, including run off, storm water or flood water; design and planning of engineered pressure pipe for use in water transmission lines, power plant cooling water systems, sewer force mains, chilled water systems, irrigation networks, treatment plant intake, process, and outfall lines, subaqueous lines, and industrial process lines; design of building blocks and bricks; design of walling and cladding systems; design of chimneys, roofing and flue systems; design and technical services for flooring and precast concrete, including engineered structural flooring and stair solutions, hollowcore flooring, and beam and block flooring; design of paving solutions; calculation of U-value for building elements and brick matching