Cold rolled steel parts for use in construction work, together with laminated plasterboard and gypsum board products where the frame is not load-bearing. C-shaped profile, used as a load-bearing element for cladding panels, partitions and ceilings. The core is perforated for inserting installations through it. It has a nominal width of 46,5 mm, with wings measuring 35 mm. It is made of 0.6-mm thick Z140 galvanised steel plate.