A device for preventing sound transmission through a spacer tube, an aperture or a duct (1) is realized by inserting a damping body (21) which can be cost-effectively mass-produced and can be inserted through the apertures in the wall (15) without any effort and with correspondingly low cost. This eliminates the need for laborious plugging with rock wool or liquid mortar.

In a first aspect there is disclosed a support structure assembly (10). The support structure assembly includes a first wall panel (12) operatively associated with an opposing, spaced apart second wall panel. The first wall panel (12) including a channel (14) having two spaced apart channel walls (16) connected via a transverse channel base (18). The channel (14) encloses a resilient body (20).

A seal for a lead-through for a tie rod through a panel formwork element. The seal includes a sleeve, a sealing element and a sliding tube, which are disposed on the tie rod and, together with the tie rod, are placed through the panel formwork element from a rear side, so that the sealing element exits the panel formwork element on a front side and, after brief pulling back of the tie rod, provides sealing between the sleeve and the panel formwork element, for one-sided anchoring.

A sleeve assembly is provided comprising an inner tubular member and at least one outer sleeve that receives at least a portion of the inner tubular member. The outer sleeve may longitudinally telescope with the inner tubular member to move between a non-expanded position and at least one expanded position. In some embodiments, the inner tubular member comprises a first locking component and the at least one outer sleeve comprises a second locking component that interlocks with the first locking component to secure the outer sleeve in the non-expanded position and/or at least one expanded position. Related methods for making a sleeve assembly are also provided.

A sleeve assembly is provided comprising an inner tubular member and at least one outer sleeve that receives at least a portion of the inner tubular member. The outer sleeve may longitudinally telescope with the inner tubular member to move between a non-expanded position and at least one expanded position. In some embodiments, the inner tubular member comprises a first locking component and the at least one outer sleeve comprises a second locking component that interlocks with the first locking component to secure the outer sleeve in the non-expanded position and/or at least one expanded position. Related methods for making a sleeve assembly are also provided.

A spacing connector used for assembling formworks and made up of at least one crosspiece, the crosspiece being connected, at both of its opposite ends, with at least one respective connection portion suited to make a connection with at least one panel of such formwork, the spacing connector also including at least one transpiration duct featuring two respective end openings, each of the end openings leading to a respective connection portion. Also disclosed is a formwork system including the spacing connectors.

A spacing connector used for assembling formworks and made up of at least one crosspiece, the crosspiece being connected, at both of its opposite ends, with at least one respective connection portion suited to make a connection with at least one panel of such formwork, the spacing connector also including at least one transpiration duct featuring two respective end openings, each of the end openings leading to a respective connection portion. Also disclosed is a formwork system including the spacing connectors.

A tie rod suitable for use with known concrete forming systems is constructed from a non-metal fiber, such as fiberglass, that is wound about a pair of opposed thimble elements. The resultant tie rod is as strong as a metal tie rod without the drawbacks of conventional metal tie rods. Each of the thimble elements has a main body having a channel formed in an outer surface of the main body, and the fiberglass fiber is disposed within the channel when wound thereabout.

A tie rod suitable for use with known concrete forming systems is constructed from a non-metal fiber, such as fiberglass, that is wound about a pair of opposed thimble elements. The resultant tie rod is as strong as a metal tie rod without the drawbacks of conventional metal tie rods. Each of the thimble elements has a main body having a channel formed in an outer surface of the main body, and the fiberglass fiber is disposed within the channel when wound thereabout.

According to one embodiment an extractor is provided that comprises a stem with a handle at one end and a conical spacer engagement device cooperating with the conical spacer for extracting it from the concrete wall at the other end. The extractor also comprises a mobile element which is displaceable by a user along the stem between a retracted position to which the mobile element is moved in order to contribute to the extraction of the conical spacer, and an advanced position to which the mobile element is moved in order to push the conical spacer, releasing it from the conical spacer engagement device. When the conical spacer engagement device is fixed to the conical spacer, then the mobile element is moved to the retracted position, the corresponding conical spacer being extracted. The mobile element is then moved again to the advanced position, releasing the conical spacer from the conical spacer engagement device.