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RE: shear wall program

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If you have emailed copies of your shear wall spreadsheet I would appreciate receiving a copy to review.







From: Casey K. Hemmatyar [mailto:khemmatyar(--nospam--at)]
Sent: Friday, March 09, 2007 6:41 PM
To: seaint(--nospam--at)
Subject: RE: shear wall program


No. For this purpose, I have developed another spreadsheet that performs this task in a more complex manner. It analyzes up to 150 walls,

based on rigid diaphragm analysis.

I have set up this spreadsheet to distribute the story shear based on relative rigidity of each plywood shearwall.

Once I run it for the first time, based on the load on each wall, the nailing requirement of each wall change, which causes the lateral drift and stiffness to change. This change in lateral stiffness, changes the lateral load distribution to each wall. I have developed macros that re-distribute the lateral load several times until the results almost converge.


For those who have privately expressed interest in the Plywood Shearwall spreadsheet, hopefully I will be able to send it to you over the weekend.

Casey (Khashayar) Hemmatyar
Private email <k(--nospam--at)>


From: Robert Jonkman [mailto: rjonkman(--nospam--at)]
Sent: Friday, March 09, 2007 12:16 PM
To: seaint(--nospam--at)
Subject: RE: shear wall program


Casey, does this spreadsheet take the generated loads and distribute them to the shearwalls based on the type of diaphragm?


Robert J. Jonkman, P.Eng.

Manager, Structural Engineering

Canadian Wood Council

Wood Engineering Software:


From: Casey K. Hemmatyar [mailto: khemmatyar(--nospam--at)]
Sent: Thursday, March 08, 2007 6:28 PM
To: seaint(--nospam--at)
Subject: RE: shear wall program



I have made an excel file for this purpose that I've been using since 1992 and have updated for new codes as required. It does calculate the accurate lateral deflection of the plywood shearwall poer code and compares it with allowable drift at each story. It can analyze and design up to  4 story . It specifies Nailing, Sill plate, Holdowns and Anchor bolts requirement. I have been using it for apartment buildings as well as other wood frame staructures.

The spreadsheet is based on the optional City of LA or CBC 2001, but I can provide an option for IBC 2003 or 2000 tables as an alternative.

If you or others are interested send me a private email at k(--nospam--at) .

Casey (Khashayar) Hemmatyar