HIGH-STRENGTH BOLTS AS A MEANS OF FABRICATING STEEL STRUCTURES

IF THE TENSION IN THE RIVETS DUE TO THEIR COOLING WILL ENABLE A RIVETED JOINT TO FUNCTION BY VIRTUE OF THE FRICTION BETWEEN THE CONNECTED PARTS, IT WOULD SEEM THAT THE SAME RESULTS COULD BE OBTAINED IF THE RIVETS WERE REPLACED BY BOLTS IN WHICH TENSION IS INDUCED BY TIGHTENING THE NUTS. THE RESULTING BOLTED JOINT WOULD FUNCTION BY VIRTUE OF THE FRICTION BETWEEN THE PARTS THAT ARE CLAMPED TOGETHER BY THE BOLTS. MOREOVER, THE CARBON-STEEL RIVETS COULD BE REPLACED BY HIGH-STRENGTH BOLTS, THUS INCREASING THE POSSIBLE CLAMPING FORCE, AND ALSO INCREASING THE RESISTANCE TO SHEAR OF THE BOLTED JOINT TO A VALUE CONSIDERABLY GREATER THAN THE RESISTANCE TO SHEAR OF THE SIMILAR RIVETED JOINT. THUS IT WOULD SEEM FROM, (1) RATIONALIZATION, (2) LABORATORY TESTS, AND (3) OBSERVATIONS ON FIELD INSTALLATIONS; THAT STRUCTURAL JOINTS FABRICATED WITH HIGH-STRENGTH BOLTS NOT ONLY SHOULD BE, BUT ACTUALLY ARE, SUPERIOR TO SIMILAR JOINTS FABRICATED WITH HOT-DRIVEN RIVETS. THE FACTS SHOULD BE NOTED, HOWEVER, THAT IN ORDER TO OBTAIN THE GOOD RESULTS DESCRIBED FROM THE USE OF BOLTED JOINTS, IT IS NECESSARY THAT: (1) THE BOLTS BE MADE OF A STEEL HAVING A MINIMUM YIELD POINT OF THE ORDER OF 85,000 PSI. AND AN ULTIMATE STRENGTH OF A LEAST 105,000 PSI.; (2) THE NUTS MUST BE TIGHTENED SO AS TO PRODUCE A TENSION AT THE ROOT OF THE THREADS OF THE BOLTS EQUAL, APPROXIMATELY, TO THE YIELD POINT OF THE STEEL; (3) HARDENED STEEL WASHERS OF AMPLE THICKNESS MUST BE USED UNDER BOTH THE HEADS AND THE NUTS; (4) SUITABLE SEA#N

  • Supplemental Notes:
    • Vol 30, pp 136-143
  • Authors:
    • Wilson, Wayne M
    • Paxson, G S
    • Stewart, W C
    • Ruble, E J
  • Publication Date: 1951

Media Info

  • Monograph Title: Proceedings of the Thirtieth Annual Meeting of the Highway Research Board Held at Washington, D.C., January 9-12, 1951
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00209442
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Jul 2 1971 12:00AM