A C profile, produced by cold forming on the production line, is designed with a height of 140 mm, 90 mm, 60 mm and various wall thicknesses (hereinafter referred to as C140, C90, C60). The ridge plate is equipped with longitudinal reinforcements to increase stiffness and loadbearing capacity. During manufacturing, various sized holes and cuts are made in the profiles to facilitate the assembly of structural elements and to ensure accuracy.