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Re: metal strapping on wall lines

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whether the wall is designed as a perforated shear wall or not, it will have stress concentrations of the lateral forces at the corners of windows and doors as shown in photos of cracks from earthquakes (and probably from wind also). Thus it is good practice to place horizontal straps on each side of windows and doors.
Stan Scholl,  P.E.
Laguna Beach, CA
On Thu, 14 Sep 2006 19:38:56 -0700 "Gerard Madden, SE" <gmse4603(--nospam--at)> writes:
Perforated Shearwall with Force Transfer Around the openings. See the SEAOC Seismic Design Manual Vol II from a few years back.


On 9/14/06, Pinyon Engineering <Pinyonengineering(--nospam--at)> wrote:
I have noticed on some wood framed houses that metal strapping is being placed at the top and bottom of windows extending on to the adjacent wall piers.  they are not perforated shearwalls.   are these straps intended to tie the windows to the shearwalls ? I thought the top plates did this.  any insight as to why strapping is being called out this way?
Tim Rudolph
Pinyon Enginnering
Bishop CA