Hayes Specialty Machining, Ltd.

Randy Draginis

Norris O Hayes

An anchor for a post tension reinforcement includes an anchor base having at least one wedge receiving bore therein and reinforcing ribs extending from an exterior of the receiving bore. A longitudinal length of the wedge receiving bore, a position of a midpoint of an axial length of the wedge receiving bore with respect to a load bearing basal surface of the anchor base, and a lateral extension and height of the ribs are selected such that a specific weight of the anchor base is at most 0.1 pounds per square inch of load bearing area.

Anchor for post tension concrete reinforcing systems

An anchor system for a tendon includes a load transfer device having at least one wedge receiving bore therein. The wedge receiving bore has a tapered interior surface. The anchor system also includes a wedge configured to be affixed to an exterior surface of a tendon. The wedge has a tapered exterior surface configured to cooperate with the tapered interior surface of the wedge receiving bore to laterally compress the wedge against a tendon when the wedge is moved longitudinally into the bore. Taper angle of the wedge and a taper angle of the wedge receiving bore are selected such that longitudinal compressive force exerted by the wedge is substantially evenly longitudinally distributed.

Anchor system with substantially longitudinally equal wedge compression

An anchor for a post tension reinforcement is disclosed. The anchor includes an anchor base having at least one wedge receiving bore therein. The wedge receiving bore is tapered in diameter at a single selected taper angle. An axial length of the wedge receiving bore is selected so that a minimum internal diameter of the wedge receiving bore is at least as large as an external diameter of a sheath on a reinforcing tendon. In another aspect, the wedge receiving bore is positioned in the anchor so that its longitudinal center is approximately collocated with a load bearing basal surface of the anchor.

A wedge for a tendon retaining anchor includes at least two circumferential wedge segments adapted to be placed on an exterior of a tendon. The wedge segments have an exterior surface adapted to cooperate with a receiving bore of a load transfer device and an interior surface having gripping elements thereon. A circumferential dimension of the wedge segments is selected so that a total uncompressed gap between circumferential ends of the wedge segments when the segments are applied to an exterior surface of the tendon is at most about 2.4 times a height of the gripping elements. In another aspect, a tendon retaining system includes an anchor having a wedge receiving bore and wedge segments adapted to cooperate with the wedge receiving bore. The wedge segments include gripping elements on an interior surface thereof. The system includes a device adapted to limit lateral compression of the wedge segments.

Anchor wedge configuration for tendon anchors

A wedge for an anchor system is disclosed. One embodiment of the wedge includes at least two circumferential wedge segments. Each segment defines an exterior tapered surface and an interior surface. The interior surface has gripping elements thereon. The gripping elements define a difference between a major diameter and a minor diameter of about 0.25 to 0.75 of an amount of a difference defined by a conventional thread having substantially a same axial spacing and major diameter as the gripping elements on the interior surface. Another embodiment of the wedge has an interior surface shaped to substantially conform to an exterior surface of a tendon.

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Terrell, TX, United States of America

Randy Draginis