9262502 A description with reference to the figures the device according to the invention generally designated by the reference numeral 1 comprises at least one pole 2 and connection means 3 for detachably associating the base of the pole 2 with the surface 4 of a building particularly for associating the base of the pole 2 with a prefabricated concrete component which is part of the building the pole 2 has proximate to its top end engagement means 5 for a cable element 6 that is suitable to form a safety parapet according to the invention the device comprises at least one leg 7 which is connected laterally to the pole 2 and can rest with its lower end on the surface 4 of the building on which the pole 2 is arranged laterally to the region of said surface that is engaged by the base of the pole 2 so as to form for the pole 2 an auxiliary resting element for pushing against the surface 4 of the building instead of a single leg 7 it is also possible to provide two legs 7 connected laterally to the pole 2 and arranged angularly spaced from each other around the axis 2 a of the pole 2 each one of these legs 7 can rest with its lower end on the surface 4 of the building laterally to the region engaged by.