A connector (100) is disclosed for use in forming a joint between a first surface (400) and a second surface (410). The connector (100) comprises a housing (10). The connector also comprises a tendon (200). A portion of the tendon (200) can protrude from the housing (10) through a seal (50). The seal (50) is configured to sealably cover an open end (14) of the housing (10) such that the tendon (200) can move through the seal (50) and laterally sideways across the open end (14) together with at least a portion of the seal (50). Also disclosed is a connector (100) system for use in forming a joint, and a method of installing a connector (100) to form a joint, between a first surface (400) and a second surface (410). The connector (100) system and method comprises and makes use of the housing (10) and the tendon (200).

An anchor rod assembly is used for being fastened into synthetic resin mortar and contains an anchor rod with a shall portion, a fastening portion, and a head having a cutting edge, and contains a sleeve-like additional element which surrounds the fastening portion at least in some regions.

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.

The invention relates to an anchor rod (10) for a chemical anchor system for use in a bore hole filled with mortar mass, which anchor rod has an anchoring region (12), which comprises the front end (16) of the anchor rod (10), and a connecting region (14), which has a thread (24) and, at the front end of the connecting region, a transition region (28), wherein the thread (24) is provided at least partially in the transition region (28) and is sealed with a coating (30) in the transition region (28).

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.

A cold-worked multi-cone anchoring element for chemical fastening technology is coated. The anchoring element detaches better from an injection mortar and exhibits both improved sliding properties and increased corrosion protection.

The invention is directed to an insert system comprising an insert with a base and an outer skirt extending from the base, thereby forming a chamber. The outer skirt is provided with a first inner skirt surface and a first outer skirt surface. The insert system further comprises a panel with a core structure and a first cover sheet that at least partially covers the core structure. The first cover sheet defines a first outer panel surface and has an opening. At least one piston is arranged in the opening and beneath the first outer panel surface. According to the invention the piston during mounting of the insert sweeps into the chamber to discharge an adhesive agent from the chamber into the core structure via at least one pathway.

A machine for rotary driving screw anchors into underlying ground and related. The machine has a mast with a rotary driver and a mandrel driver oriented on a common axis. The mandrel driver passes a mandrel through the rotary driver and the screw anchor to allow the mandrel to be actuated ahead of the screw anchor while the rotary driver drives the screw anchor into the ground. Alternatively, the mandrel driver may also drive a hammering drill through the screw anchor to clear a path ahead of it through subsurface rocks.

A fastener-receiving insert system includes a fastener-receiving insert having a proximal end and a distal end and at least one adhesive-dispensing chamber adjacent to the distal end of the insert, containing at least one part of an adhesive material within a chamber wall. The fastener-receiving insert system further includes a puncturing device operably engaged with and configured to puncture the chamber wall to release the at least one part of the adhesive material around the fastener-receiving insert.

A machine for rotary driving screw anchors into underlying ground and related. The machine has a mast with a rotary driver and a mandrel driver oriented on a common axis. The mandrel driver passes a mandrel through the rotary driver and the screw anchor to allow the mandrel to be actuated ahead of the screw anchor while the rotary driver drives the screw anchor into the ground. Alternatively, the mandrel driver may also drive a hammering drill through the screw anchor to clear a path ahead of it through subsurface rocks.