SW Umwelttechnik Stoiser & Wolschner AG, together with its subsidiaries, develops, manufactures, and sells precast concrete products and parts for the civil engineering, transport, building construction, and housing sectors in Austria, Hungary, Romania, and rest of Europe. It operates through Civil Engineering & Transportation; and Building Construction and Housing segments. The company offers sewer shafts, sewer pipes, pumping stations, cesspools, and soakaway products for wastewater drainage; mineral oil and grease separators, biological sewage treatment plants, and surface water cleaning products for wastewater treatment; bridges, slope reinforcements, culvers, and concrete barriers for traffic construction; and rainwater use products and drinking water storage systems for water use. It also provides masts for telecommunications and power supply, transformer stations, fish ladders, and components for power plant construction; prefabricated parts for structural buildings; and ceiling systems, pavings, building blocks, and prefabricated stairs for residential construction. In addition, the company offers large containers for road construction; building elements for roofs; walls, beams, and supports for residential and high-rise construction; and water protection systems. It serves construction companies, building material dealers, energy suppliers, and state-owned road construction and railway companies. SW Umwelttechnik Stoiser & Wolschner AG was founded in 1910 and is based in Klagenfurt, Austria.