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RE: Round Concrete beam

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Title: RE: Round Concrete beam


Sounds like their ICF might meet the prescriptive requirements contained in the International Residential Code (IRC) wherein tabular values are provided for structural properties (allowable shear, bending, etc. based on given reinforcing).  The problem arises when the concrete core does not meet the geometry requirements specified by the IRC, then manufacturer’s data & testing must be consulted.  We (ACI Committee 560, of which I am a member) are in the process of trying to move away from the prescriptive nature of the code and provide a methodology that will allow one to apply ACI 318 to these types of systems….I’d be interested in hearing anyone’s perspective on either grid-wall or waffle-grid (i..e, non flat) systems which they have designed by typical design-office techniques……….


Robert C. Rogers, PE

Project Engineer

Steven Schaefer Associates, Inc.

Phone: (513) 542-3300         Direct: (513) 233-7085

    Fax: (513) 542-5540     Toll Free: (800) 542-3302



Consulting Structural Engineers