C-profile rail made of galvanized sheet steel 25x50mm length 3000mm. Perforated C-profile rail made of galvanized sheet steel as a supporting element for wall and post brackets in the longitudinal direction of the duct or as a cross member between two threaded rods, for supporting cable routing ducts or fire protection ducts, consisting of C-profile rail 50 x 25 mm with rolled flanks and 5 mm toothing grid as well as punching 21 x 21 mm (square) and 11 x 16.5 mm (long hole). Note: Tension connectors must be used for fastening. C-profile rails must be mounted lengthwise to support the channels.