Screw connections in concrete for vertical extraction forces and/or horizontal forces

摘要

The invention relates to an anchorage for steel structural components, which is mounted retroactively by screw connection, on concrete parts, is inserted into the concrete during the concreting of these concrete parts and has to absorb vertical extraction forces and/or horizontal forces. The object is achieved according to the invention in that a washer and a heat-treated screw nut are arranged at the lower edge of a steel tube of any desired length. The screw nut and the washer are encased in plastic and non-positively connected (Fig. 3) to the steel tube, e.g. by a tube connection attached to the plastic casing. Steel structural components can be screwed onto concrete parts with prestress by a screw bolt screwed into the screw nut. As a result of the prestressing force between the steel structural component and the steel tube, horizontal forces can be transmitted, by way of friction, to the steel tube and from there to the concrete. Vertical extraction forces are conducted from the screw nut into the concrete by way of the steel washer. Anchorages comprising a plurality of screw connections are connected at predetermined distances from one another by spacers. <IMAGE>