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Equivalent Thickness of Concrete Masonry Units as Related to Fire Tests, Plus Amendment and Appendices A and B

• ID:

  87

• ESCSI:

  3220.046

• Author:

  King, H.I.

• Publication Name:

  Equivalent Thickness of Concrete Masonry Units as Related to Fire Tests

• Type of Publication:

  Article

• Publisher:

  ESCSI

• Dated:

  1964

• Issue/Volume:

  November 13, November 16

• Other ID:

• Page(s):

  1-5 + append.

• Reference List:

  N

• Abstract:

  The purpose of this report is to define three possible equivalent thickness determinations, to show how and why they differ and to make recommendations with respect to reporting equivalent thickness in future reports.Fire test results on concrete masonry have been variously reported and tabulated as a function of (a) thickness of the unit with its face shell and web thicknesses, (b) thickness of the unit with its percentage of solids volume, and (c) the equivalent thickness of the unit without regard to total thickness.
  Of these, (c) is certainly the most useful and versatile figure. It removes the total thickness as a variable; it permits of easy plotting of results with ready interpolation.
  Equivalent thickness is the product of total thickness and percent solid in the unit. In the Expanded Shale Clay and Slate Institute 1962 fire test series, and in earlier private tests, it was made evident that percent solid, and hence equivalent thickness, was variable dependent on the method of determination.