Abstract: The device makes use of, firstly, four-sided hollow profile sections having a longitudinal slot along one side and cut-outs on the opposite side of the profile and, secondly, damping elements of rubber or rubber-like elastic material, which can be inserted in the hollow profile for the purpose of sound-insulation. Each damping element has a through hole for a connecting bolt and a shoulder that surrounds the hole and projects beyond a damping element's bearing surface which comes into contact with the profile. Because the shape and size of the projecting shoulder, the longitudinal slot, and the cut-outs match, the device provides for a wide range of possible uses and mounting configurations with a small number of simple, standardized components.

Abstract: On the cable-laying conduit of rectangular and square cross section, the longitudinal opening for insertion of the cable is disposed in one corner of the conduit cross section. The opening is formed by shortening the two abutting conduit sides. At least three of the four conduit sides have outer fastening strips, extending parallel in the longitudinal direction, for installing the conduit. When the conduit is embodied as a grid structure with longitudinal members and transverse members, two side segments each pointing toward one corner are shortened, inorder to form the longitudinal opening. An embodiment as an extruded profile, for instance of plastic, is also possible. The disposition of the fastening strips or longitudinal members in a spacing pattern is suitable for installation by means of hooked brackets.

Abstract: The device has square frames mounted at a distance from each other and with parallel planes on the wall. In the interior of the frames extend ducts, preferably of a lattice structure, which are exchangeably disposed. Furthermore, the frames are used as supports for exterior facing plates. One of the sides of the frames is connected via a hinge with an adjacent side and (together with the facing plate fastened thereon) is outwardly pivotable. Apparatus supports for electric sockets, etc., are mounted in optional locations, also inside the frame cross section, on ducts or on special intermediate supports. Great flexibility with respect to the total cross section, arrangement, fitting with apparatus and choice of facing is made possible.