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RE: Alternate Wind Provision

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Trying to get my Inbox cleaned up…


I wanted to note that the IBC-Structural committee voted to approve the NCSEA version of the simplified wind procedure (S84, with minor modifications), over the SEAOC version (S85). The debate was extensive, but it did appear that one of the primary factors in the final decision was that the NCSEA version was a fully stand-alone method. The SEAOC method referred to the ASCE edge and corner zones but did not incorporate the ASCE 7 figures. Also there was much discussion of how both methods incorporated the internal pressure coefficients. The final vote was very close: 7-6 I believe.


I'm at an ASCE 7 wind subcommittee meeting right now; we're going to be discussing the proposal further with NCSEA later today.



Gary J. Ehrlich, PE
Program Manager, Structural Codes & Standards
National Association of Home Builders (NAHB)
1201 15th Street, NW, Washington, DC 20005
ph: 202-266-8545  or 800-368-5242 x8545
fax: 202-266-8369