BRIDGE RESTORED TO EARLIER FORM

The National Park Service is rebuilding a Roebling suspension bridge close to its 1849 form, preserving the original piers, abutments, cables and hangers, and replacing all other features. The NPS will recreate the original trunk more or less to Roebling's original design. No contemporary hardware such as split-ring connectors or claw plates are used for the timber framing, but bolts and other hardware will be galvanized. Old frames were removed and new frames installed in pairs. The 5,000-pound frames are spaced at 4-ft centers, and a yard crane on the bridge deck could reach four frames from one position. Details of the positioning of the frames are briefly described. The bridge will carry a single lane of traffic in one direction at a time. Although the 10-ton load limit is far less than the 500-ton, uniformly distributed load of the canal, the bridge had to be stiffened to distribute wheel loads. A steel truss was put in the trunk walls to distribute the live loads, and the deck was stiffened with concrete. Design and construction details are briefly summarized.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08919526
• Corporate Authors:

  McGraw-Hill, Incorporated

  330 West 42nd Street
  New York, NY  United States  10036
• Publication Date: 1986-10-30

Media Info

• Pagination: p. 32
• Serial:
  • Engineering News-Record
  • Volume: 217
  • Issue Number: 18
  • Publisher: McGraw-Hill, Incorporated
  • ISSN: 0891-9526

Subject/Index Terms

• TRT Terms: Bridge decks; Bridge design; Bridges; Construction; Historic preservation; Reconstruction; Structural design
• Uncontrolled Terms: Restoration; Stiffening
• Subject Areas: Bridges and other structures; Construction; Design; Highways; History; Maintenance and Preservation; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00460249
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 31 1986 12:00AM