Abstract: An apparatus and a method are disclosed for inducing torsion-free axial tensile stress in a tendon. The apparatus includes tapered wedge-grippers mounted on the tendon, an externally threaded hollow sleeve member with tapered inner surfaces concentrically mounted on the wedge grippers, and an internally threaded nut placed around the sleeve and in contact with a cooperating bearing surface through which the tendon projects. The sleeve is provided with a head having at least a pair of parallel surfaces which are engagable by a torque wrench for restraining it against rotation as the nut is rotated with a second torque wrench. The resultant movement of the sleeve together with interaction of the members of the apparatus results in torsion-free axial tensile stress in the tendon.

Abstract: Apparatus and method are disclosed for connecting horizontal beams to vertical surfaces of supporting structures. Two slidingly interconnecting elements are affixed, respectively, to a vertical surface of supporting structure, and an end of a horizontal beam and then positioned for positive stable coupling. The joint created by the elements is filled with grouting to substantially prevent movement of one element relative to the other element.