• When Should You Stress a Cable Slab? October 26, 2015

    The question as to when the proper time to apply the stressing force to the post tensioned cable in this type of reinforced foundation is of considerable interest. If you apply the stressing load too soon you have the danger of pulling cable anchorages out of the green concrete. If you wait too long [...]

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  • Expansive Clay and Foundations September 17, 2015

    This subject has received attention from many sources for many years, but nevertheless remains a hot topic with regard to design and construction of lightly loaded, shallow foundations in Central Texas.  The prime design problem for these foundations is swelling or expansive clays. A shallow [...]

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  • Shrinkage Crack Considerations for Post-Tensioned Foundations June 1, 2015

    Shrinkage cracks in concrete slab-on-ground foundations are a significant public relations problem to home builders. All concrete will shrink during the curing process which lasts up to a year after the time concrete is placed in the forms. Curing involves loss of water from within the concrete, [...]

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  • Defining Foundation or Structural Failure June 1, 2015

    When has a foundation or any other structural unit failed? There are three categories in which a structure could be placed with regard to structural performance: Obvious failure: Collapse Major distress and distortion Functionality Impairment Obvious non-failure: No distress No [...]

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  • Cracks! In Concrete March 12, 2015 | Republished, Kirby T. Meyer, P.E.

    One of the more disagreeable features of construction concrete is its ability to generate cracks. Cracks are of several varieties. Some are very fine, almost invisible to the naked eye, some are large and ominous looking. There are two basic types of cracks; the first type is shrinkage related while [...]

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