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Protan
35 EPDs
EPD: Steel beams, trusses, welded and coated sections, 7850kg/m3, scrap - 20-30%, Welded and Coated sections, trusses and beams made of hot-rolled plate, sheet and coil (Ruukki Construction Oy)
Product description: Welded and coated sections, trusses and beams made of hot-rolled plate, sheet and coil for use in building construction projects. Steel structures are highly prefabricated, ready-to-install, energy-efficient solutions for single- and multi-storey buildings. A frame solution for multi-storey buildings usually consists of workshop-primed WQ beams and coated composite columns, which can be used to create modifiable premises. Typical single-storey buildings are constructed using prefabricated trusses. There are also many fire protection solutions available for frames. The steel in the steel structures under this environmental product declaration is sourced from Ruukki’s steel works in Raahe, Finland. The amount of scrap steel used varies between around 20–30 % of the steel charge depending on the steel grade and method of manufacture. In 2012, the average value was 20%. Use of energy and raw materials has been optimised in steel production. Technical data: This environmental product declaration covers steel structures made by Ruukki in Peräseinäjoki and Ylivieska (Finland), Gargzdai (Lithuania) and in Oborniki (Poland). Choice of production site is determined according to, for example, product requirements and construction site location. Steel made in Raahe steel mill in Finland is used in the structures. Steel structures include steel beams, girders, columns, trusses, bonds and embedded fixtures made in con-formity with EN 1090 standard. Welded sections and WQ beams are made from hot-rolled, plate, sheet and coil. Trusses and structural tubes are made of cold-formed tube. Steel plates, tubes or sections are first cut by flame cutting or sawing to the required length and then welded together, shot blasted and coated with paint. Surface treatment causes volatile organic compounds (VOC) emissions of approximately 5 kg per tonne produced. VOC emissions per tonne depend, however, on the weight of the structure and the chosen painting system. Coating is chosen according to customer requirements and the corrosivity category. Coating is done using 1–3 layers of either polyurethane, zinc powder, alkyd or epoxy paint. Coating thickness is 100-360 μm depending on the corrosivity category. If fire-retardant paint is required, it is added between the primer and top coat in frames. Coating thickness of fire-retardant paint depends on fire resistance requirements. Product specification: Steel is an alloy of mainly iron and carbon, with small amounts of elements used as alloying elements. These elements improve the chemical and physical properties of steel such as strength, durability and corrosion resistance. The alloying elements of steel are closely linked to its chemical matrix. The steel used in steel structures meets the quality criteria for steel according to EN standards. Welding consumables and coatings are the other raw materials used in the manufacture of steel structures. Measures are done to a level of 0,02 μg/g (0,00000002%). Concentrations below this degree of measuring accuracy cannot be determined.
finland