This investigation was a pilot study to develop the technique for nondestructive measurement of variations in depth, width, and location of reinforcing steel in existing reinforced concrete beams and joists of 8 in. (20.3 cm) or greater depth. Data were collected on beams and joists chosen from five structures by both optical and electronic measuring devices. Statistical evaluation of this data is presented as well as a computer analysis of the approximate effect of such variations on the strength of the sections. The study proves the technique and gives bounds to the problem, and as such is not all-encompassing. Further study is shown to be a necessity, as the results reveal that current as-built structures normally exceed the design-assumed tolerances.

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  • Corporate Authors:

    American Concrete Institute

    P.O. Box 19150, Redford Station, 22400 Seven Mile Road
    Detroit, MI  United States  48219
  • Authors:
    • Connolly, J P
    • Brown, D M
  • Publication Date: 1976-11

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Subject/Index Terms

Filing Info

  • Accession Number: 00163627
  • Record Type: Publication
  • Report/Paper Numbers: Title NO. 73-51
  • Files: TRIS
  • Created Date: Oct 29 1977 12:00AM