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RE: Perforated shear walls

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Under the 2000 and the 2003 code the figure I mentioned did not include the perforated shear walls.  There were reductions that you needed to take from table 2305.3.7.2 which adjusted your capacity depending on percent of full-height sheathing.


For the 2003 IBC section 2305. parts 2 & 3, which talk about the height of your piers it does not specifically say that you need to meet the 2:1 or 3.5:1 ratio.


For the 2006 IBC this same section (now named as section 2305. parts 2 & 3) was changed and does now specifically include the 2:1 or 3.5:1 ratio. 


Whether the intent was to be included in the 03 and 00 codes I am not sure, but I know of designs and engineers that said the percent full height reduction took into consideration the height-to-width ratio.  So if the building was built under the 03 or 00, it may have met the code.  I don’t know if I agree with the reasoning but it made sense, at the time.





-----Original Message-----
From: Jeff Hedman [mailto:jeff_h(--nospam--at)]
Sent: Friday, December 07, 2007 10:28 AM
To: seaint(--nospam--at)
Subject: Re: Perforated shear walls



If the height to width ratios still apply, any idea how this building got through plan check with shear walls that don’t meet the ratios?


Jeff Hedman , E.I.T.

L.R. Pope Engineers & Surveyors, Inc.

1240 East 100 South Suite # 15B

St. George, Utah  84790

Office: 435-628-1676

Fax: 435-628-1788


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