Abstract: A method for temporarily releasing a screw anchorage includes unscrewing and removing a primary screw having a thread that is tappingly engaged in a mating thread in an ungrouted hole in a mineral substrate from the ungrouted hole. Subsequently to the unscrewing and removing, a retrofitting screw is screwed into the hole to form an annular gap between the retrofitting screw and the mineral substrate. A hardenable grout is placed in the annular gap and the hardenable grout is hardened in the annular gap.

Abstract: A disassembly method for an anchor that is anchored in a hole and that has an anchor bolt is provided, whereby, during the disassembly procedure, a torque is applied to the bolt of the anchor that is anchored in the hole and, in this process, the anchor bolt is stressed until it breaks. An anchor which has a head and whose bolt has an engaging profile so that a torque can be applied to the anchor bolt is also provided.

Abstract: A system includes a power tool that has a rotation output shaft for rotationally driving a levelling mechanism for a structural attachment and has a rotation drive mechanically connected to the rotation output shaft to rotationally drive the rotation output shaft. The system further includes a remote unit that has a first structural attachment contact structure where the first structural attachment contact structure is contactable with the structural attachment and where the remote unit is detached from the power tool. The system additionally includes a control arrangement that has an orientation device configured to provide orientation data relating to an orientation of the first structural attachment contact structure and has a drive controller which is connected to both the rotation drive and the orientation device where the drive controller is configured to influence action of the rotation drive in response to orientation data provided by the orientation device.

Abstract: Threaded rod connector including a housing having a cavity for receiving a threaded rod therein, wherein the cavity has a mouth, and an insert including a plurality of rod engagement segments, which are arranged within the cavity, wherein the cavity has a tapered zone tapering towards the mouth for wedging the rod engagement segments against the threaded rod, wherein the insert further includes a plurality of segment carrying arms, wherein each of the segment carrying arms carries at least one of the rod engagement segments, wherein the segment carrying arms form a cage for accommodating the threaded rod. The insert further includes a collar, which is connected to the segment carrying arms, and which interconnects the segment carrying arms, and the cavity has a collar locking zone, in which the collar is arranged, wherein the housing rotationally locks the collar arranged in the collar locking zone to the housing.

Abstract: Threaded rod connector including a housing having a cavity for receiving a threaded rod therein, wherein the cavity has a mouth, and an insert including a plurality of rod engagement segments, which are arranged within the cavity, wherein the cavity has a tapered zone tapering towards the mouth for wedging the rod engagement segments against the threaded rod, wherein the insert further includes a plurality of segment carrying arms, each having a segment connection end and an interconnection end, which is located opposite the segment connection end on the respective segment carrying arm, wherein each of the rod engagement segments is connected to at least one of the segment carrying arms at the segment connection end thereof, and wherein the segment carrying arms are interconnected at their interconnection ends. Each of the segment carrying arms extends, originating from its segment connection end, towards the mouth of the cavity.

Abstract: Threaded rod connector including a housing having a cavity for receiving a threaded rod therein, wherein the cavity has a mouth, and an insert including a plurality of rod engagement segments, which are arranged within the cavity, wherein the cavity has a tapered zone tapering towards the mouth for wedging the rod engagement segments against the threaded rod, wherein the insert further includes a plurality of interconnected segment carrying arms, wherein each of the rod engagement segments is connected to at least one of the segment carrying arms, wherein the segment carrying arms form a cage for accommodating the threaded rod. The insert further includes a collar, wherein the segment carrying arms are interconnected via the collar, and wherein the collar surrounds a rod accommodation hole that is aligned with the cage, such that a straight threaded rod can be simultaneously positioned both within the rod accommodation hole and within the cage.

Abstract: A method for rating a fastener arrangement that includes a mineral substrate having a hole and a screw which is disposed in the hole, includes unscrewing the screw out of the hole, following the unscrewing, optically inspecting the hole for presence or absence of grout in the hole, and rating the hole as satisfactory when grout has been optically detected in the hole and rating the hole as unsatisfactory when grout has not been optically detected in the hole.

Abstract: A method for temporarily releasing a screw anchorage includes unscrewing and removing a primary screw having a thread that is tappingly engaged in a mating thread in an ungrouted hole in a mineral substrate from the ungrouted hole. Subsequently to the unscrewing and removing, a retrofitting screw is screwed into the hole to form an annular gap between the retrofitting screw and the mineral substrate. A hardenable grout is placed in the annular gap and the hardenable grout is hardened in the annular gap.

Abstract: A method for rating a screw which is disposed in a hole in a concrete or masonry substrate includes applying a screw torque to the screw, measuring motion data of the screw in response to the applied screw torque, and rating the screw as either satisfactory or unsatisfactory on a basis of the measured motion data.

Abstract: A disassembly method for an anchor that is anchored in a hole and that has an anchor bolt is provided, whereby, during the disassembly procedure, a torque is applied to the bolt of the anchor that is anchored in the hole and, in this process, the anchor bolt is stressed until it breaks. An anchor which has a head and whose bolt has an engaging profile so that a torque can be applied to the anchor bolt is also provided.