RIBBED FLEXIBLE MEMBER FOR CASTING INTO AN ANCHORAGE MEDIUM

摘要

Parts (6) of the exposed surfaces of a plurality of the helically extending outer wires (4) of a strand (1), e.g. for use as a roof bolt, are upset in a substantially non-axial direction. The upset parts or indentations (6) enhance keying to the anchoring medium and resist the tendency of the strand (1) to screw out of the anchoring medium, in use.