The Rip Bridge, spanning the 600 ft wide tide-swept entrance to Brisbane Waters just north of Sydney, NSW, Australia, is described as a large modern structure of unusual interest in that the cantilever truss system was literally stitched together with the post-tensioning tendons. With a total length of 1082 ft, and assembled from large precast concrete elements at 60 ft module, the three-span arch-shaped cantilever truss system has a main span of 600 ft with its centre 56 ft above the fast and treacherous tidal flow. The identical cantilever trusses which sit symmetrically on either side of the rip crossing reach out 240 ft towards each other to support a 120 ft simple span on their tips. Photographs and diagrams assist the description of the construction of the bridge which was completed within a construction time of 140 weeks at a contract price of $A2.17 M. The precast concrete elements were delivered by road from the factory some 80 miles from the site, and the whole of the work was carried out "in-the-dry". Information provided includes details of the panel-by-panel erection of the precast elements which comprise the major part of the structure, the use of the bbr system of post-tensioning, the erection of the simply supported central span, and the introduction of hinges throughout the structure until a late stage in construction (freyssinet flatjacks were used in the lower chord) to overcome problems associated with bending movements. /TRRL/

  • Availability:
  • Corporate Authors:

    Cement and Concrete Association

    Wexham Spring
    Slough SL3 6PL, Buckinghamshire,   England 
  • Authors:
    • WHEEN, R J
  • Publication Date: 1979-3

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 12-15
  • Serial:
    • Volume: 13
    • Issue Number: 3
    • ISSN: 0010-5317

Subject/Index Terms

Filing Info

  • Accession Number: 00301854
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Dec 19 1979 12:00AM