Many highway bridges become functionally obsolete due to inadequate width long before they become structurally deficient. Since widening almost always is more economical than complete replacement, there is a need to make available the results of research and field experience pertaining to the widening of bridges. This guide discusses many problems that are unique to the widening of existing concrete bridges and bridges with concrete decks. The primary focus of this document is on bridge decks. However, substructure issues are also raised and discussed. The effects of differential movements between the existing and new portions, including movements due to traffic on the existing structure during construction, are discussed. General recommendations are made pertaining to the choice of structure type, design details, and construction methods and materials.

  • Corporate Authors:

    American Concrete Institute

    P.O. Box 19150, Redford Station, 22400 Seven Mile Road
    Detroit, MI  United States  48219
  • Publication Date: 1993-1


  • English

Media Info

  • Features: Figures; Photos; References;
  • Pagination: 16 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00627073
  • Record Type: Publication
  • Report/Paper Numbers: ACI 345.2R-92
  • Files: TRIS
  • Created Date: Mar 11 1993 12:00AM