Report • &t 7- 0O 5c2
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r 1 T1 RECEIVED SEP 14 2007
�-- - , ® /" 7 „ Consulting Engineers
September 12, 2007
Ms. Diane Kelley
Milstead & Associates, Inc.
10121 SE Sunnyside Road Suite #335
Clackamas, OR 97015
RE: Tigard High School - Arts Wing Water Damage
Dear Diane:
On Monday, September 10, 2007 we went to Tigard High School to observe the structural damage presumably
caused by moisture in the exterior walls of the arts wing. The structural system consists of one story wood framed
bearing walls, open web wood roof joists, a conventional spread footing foundation, and wood structural panel shear
walls to resist lateral loads.
The exterior wall covering had been removed to expose the framing behind on two of the exterior walls of the arts
wing building. There were signs of water damage around the king, trim, and cripple studs at the window openings
indicative of prolonged exposure to moisture. The studs displayed varying degrees of rot and we would estimate that
-- between 30% and 70% of the material had been lost in these members. However, based upon what was exposed to
our view, the damage does not jeopardize the vertical load carrying capacity of the studs and no shoring of these
walls is necessary. Because of the height of these walls, the primary loading they will see is wind loading. That
makes these studs more sensitive to material loss than typical bearing studs. Therefore, we are recommending that
any observed rot greater than 3 /4" occurring anywhere over the height of the studs will require replacement of that
stud. A new stud shall be sistered onto the existing stud for the full height of the wall. At the rotted king studs, the
replacement studs shall be nailed to the existing studs with (2) 16d nails at 16" on center.
This report was based on visual observations only No structural analysis was conducted on the information in the
existing drawings. Observations, conclusions, and recommendations contained in this report reflect our best
engineering judgment. Concealed problems with the construction of the building may exist that were not revealed
through our review. KPFF, therefore, is unable to warrant or guarantee the condition of the existing construction of
the building.
If you have any questions or need further information, please call me.
Si erely,
---7\"-{11(
Aar -Burkhardt, .E.
Associate
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206398.01 /ArtsWing.doc
111 SW Fifth Avenue, Suite 2500 Portland, Oregon 97204 -362B (503) 227 -3251 Fax (503) 227 -7980
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