In 1972, a nationwide study was undertaken by the Federal Highway Administration to measure the clear cover over the top mat of bridge deck reinforcing steel. This report contains the study findings. Typically of the bridges tested, the average concrete cover depth exceeded design requirements. However, because the cover depth distribution is near normal, a significant portion of the deck (approximately 30 percent) has less than design cover. Those bridges that met design cover requirements by 100 percent have an average cover depth approximately 3/4-inch (19mm) greater than design. Design and construction practices were compared with the field measurement results to determine if a correlation exists between these practices and cover depth. No single practice was found to contribute significantly to cover depth deviating from design depth.

  • Corporate Authors:

    Federal Highway Administration

    Demonstration Projects Division, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Van Daveer, J R
    • Sheret, G D
  • Publication Date: 1975-9

Media Info

  • Pagination: 66 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00093943
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FHWA-DP-15 Final Rpt.
  • Files: NTIS, TRIS, USDOT
  • Created Date: Mar 10 1976 12:00AM