The mounting has two or more supporting members (3) secured to the outside of the formwork by a distorting strap passing round the latter. The members are equipped for the attachment of the holding components. Each member comprises a piece of wood (11) in a metal fitting (4, 5,6) and, to hitch the holding component, is nailed, the latter consisting of a plant (14) fixed at the bottom end and to the portion of the building etc. on which the formwork rests. The metal fitting is of H-section in plan view and formed by three sections of sheet-metal, acting as a supporting shoe against the formwork. ADVANTAGE - Usable with formwork of any desired cross-section.