Abstract: A cable ladder formed by two side rails and crosspieces, all formed of extruded polymer material. The side rails have a channel receiving a corresponding end of the crosspieces. The channel has a lower rib and an upper rib. A projection of the lower rib or upper rib has openings along a longitudinal direction of the side rail. The ends of the crosspieces go through the opening of the projection and have a recess in which a corresponding portion of the channel is snap-fitted. The lower rib of the side rails is bent over itself along a bending line, such that a final section of the lower rib experiences downward expansion by elastic bending when the end of the crosspiece is introduced.

Abstract: A cable ladder formed by two side rails and crosspieces, all formed of extruded polymer material. The side rails have a channel receiving a corresponding end of the crosspieces. The channel has a lower rib and an upper rib. A projection of the lower rib or upper rib has openings along a longitudinal direction of the side rail. The ends of the crosspieces go through the opening of the projection and have a recess in which a corresponding portion of the channel is snap-fitted. The lower rib of the side rails is bent over itself along a bending line, such that a final section of the lower rib experiences downward expansion by elastic bending when the end of the crosspiece is introduced.

Abstract: A dowel inserted under pressure in a hole, including a head and a body which remain outside and inside the hole, respectively. The head is suitable for a clamp to pass through. The body includes a central core from which there emerge annular retention tabs having a slightly larger diameter than the hole, all provided with radial notches, and a centring annular projection. Each annular retention tab forms a pair with an annular abutment tab located, with respect to the former, in the position nearest the head. The annular abutment tab has a diameter that is smaller than that of annular retention tab and equal to that of the hole.

Abstract: A dowel inserted under pressure in a hole, including a head and a body remain outside and inside the hole, respectively. The head is suitable for a clamp to pass through. The body includes a central core from which there emerge annular retention tabs having a slightly larger diameter than the hole, all provided with radial notches, and a centring annular projection. Each annular retention tab forms a pair with an annular abutment tab located, with respect to the former, in the position nearest the head. the annular abutment tab has a diameter that is smaller than that of annular retention tab and equal to that of the hole.