| 主权项 |
1. A system for preloading tension in a stud including first and second ends and a central axis, wherein the stud is positioned within an aperture defined in a structural member, wherein the first end of the stud is configured for engaging the structural member, and wherein the second end of the stud includes a first set of external threads and a second set of internal tapered threads, the system comprising:
a) a hydraulic tensioning device including:
i) a nut having a first set of internal threads configured for engaging the first set of external threads on the stud;ii) a foot including first and second ends, the first end of the foot configured for engaging a second surface of the structural member, and the second end of the foot extending in a direction away from the second surface of the structural member;iii) a cylinder having a first bore defined therein, the cylinder including a first surface for engaging the foot;iv) a piston movably positioned relative to the cylinder, wherein a hydraulic cavity is defined between the piston and the cylinder;v) a puller screw including first and second ends, the first end of the puller screw including a first set of external tapered threads configured for being threadably coupled with the second set of internal tapered threads of the stud, the second end of the puller screw coupled with the piston; and b) a spacer positioned between the first set of external tapered threads of the puller screw and the second set of internal tapered threads of the stud. |
