They are made of galvanized steel or coated steel with a thickness of 0.5 to 0.7 mm in grades S280 GD or S350 GD. They are most often used as elements to which external cladding is attached as well as it is also possible to use them as a replacement for wooden laths when assembling sheet metal or trapezoidal sheets. They are produced in three heights: - Omega 20 - Omega 30 - Omega 50 Their biggest advantage is high rigidity and strength, durability and low weight of the structure as well as the ideal grate plane. The minimum profile length is 0.5 meters and the maximum is 6 meters in.