Hydraulic rod tensioning system

A tensioning system for tensioning a stud that projects from a structural member, the stud having a central axis, the tensioning system comprising:

• a nut having internal threads and external threads, the nut including at least two axial bores defined therein;
• a puller screw including first and second ends, the first end of the puller screw configured for engaging the stud, the second end of the puller screw including external threads configured for engaging the internal threads of the nut,
• at least two posts, each of the posts having first and second ends, each of the posts disposed in a corresponding one of the at least two axial bores, each of the first ends of the posts being configured for being supported by the structural member, wherein a portion of each of the second ends of the at least two posts extend outwardly from the at least two axial bores in a direction away from the structural member;
• a cylinder including a sidewall and a closed bottom, the sidewall including internal threads configured for engaging the external threads of the nut, the sidewall having a bore defined therein;
• at least one locking member positioned within the bore defined in the sidewall of the cylinder, the at least one locking member being configured for engaging the nut to fixedly position the nut relative to the cylinder;
• and
• a piston movably positioned within the cylinder to define a hydraulic chamber between the piston and the cylinder, the piston configured for being supported by the second ends of the at least two posts,
• wherein when a hydraulic fluid is fed into the hydraulic chamber, the piston and cylinder move away from each other to apply a tension force on the stud.

A tensioning system for tensioning a stud that projects from a structural member, the stud having a central axis, the tensioning system comprising:

• a nut having an internal surface and an external surface, the internal surface configured for engaging the stud, the nut including at least two axial bores defined therein;
• at least two posts, each of the posts having first and second ends, each of the posts disposed in a corresponding one of the at least two axial bores, each of the first ends of the posts being configured for being supported by the structural member, wherein a portion of each of the second ends of the at least two posts extend outwardly from the at least two axial bores in a direction away from the structural member;
• a cylinder including a sidewall and a closed bottom, the sidewall including an internal surface configured for engaging the external surface of the nut, the sidewall having a bore defined therein;
• at least one locking member positioned within the bore defined in the sidewall of the cylinder, the at least one locking member being configured for engaging the nut to fixedly position the nut relative to the cylinder;
• and
• a piston movably positioned within the cylinder to define a hydraulic chamber between the piston and the cylinder, the piston configured for being supported by the second ends of the at least two posts,
• wherein when a hydraulic fluid is fed into the hydraulic chamber, the piston and cylinder move away from each other to apply a tension force on the stud.