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RE: Round Concrete beam[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaint(--nospam--at)seaint.org>
- Subject: RE: Round Concrete beam
- From: "Robert C. Rogers" <rcr(--nospam--at)ssastructural.com>
- Date: Thu, 25 Aug 2005 15:11:28 -0400
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
Steven Schaefer Associates, Inc.
Phone: (513) 542-3300 Direct: (513) 233-7085
Fax: (513) 542-5540 Toll Free: (800) 542-3302
Consulting Structural Engineers
From: Joe Grill [mailto:jgrill(--nospam--at)swiaz.com]
Sent: Thursday, August 25, 2005 12:36 PM
Subject: Round Concrete beam
Our office is in the process of a move, so most of my library is in boxes. I am attempting to do some design for a home where the architect wants to use an ICF type of wall construction. This particular manufacturer has yet to complete testing, so there aren’t design tables available from the manufacturer. Basically the vertical cells are round with a single #5 bar centered in the cell. To find the flexural capacity of the cell, can I use a square section with an equivalent area? It seems I read that in a design manual for ICF type of products but I can’t find the manual because of the move. Can anyone comment, or should I keep looking for the manual. Please don’t make me go through all those boxes.
Joseph R. Grill, P.E. (Structural)
Shephard - Wesnitzer, Inc.
Civil Engineering and Surveying
1146 W. Hwy 89A Suite B
Sedona, AZ 86340
PHONE (928) 282-1061
FAX (928) 282-2058
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