Report (29) .fes
4_ 4
cREE
FORENSICS
A JENSEN HUGHES COMPANY
November 9, 2017
City of Tigard
13125 SW Hall Boulevard
Tigard, Oregon 97223
CHAU RESIDENCE - RESPONSE TO INSPECTION REPORT
Homeowner: Len Chau
Residence Address: 13663 SW Benchview Terrace
—Tigard, Oregon 97223
Record Type: Residential—Master Permit
Record ID: MST2017-00347
Inspection Type: 275 Framing
Inspector: David Young
CASE File Number: 201607
In response to the October 20,2017 inspection report from Mr.Young of the City of Tigard,CASE Forensics(CASE),
a JENSEN HUGHES Company reviewed a wood column in the garage of the residence located at 13663 SW
Benchview Terrace, Tigard, Oregon. Structural repairs to a portion of the residential framing were designed by
CASE to remediate damage caused by a vehicle impact to the garage. CASE's structural drawings were permitted
by the City of Tigard on September 20, 2017.
Measured from the permitted structural drawings, the subject column is located approximately 9'-10" north of the
garage south exterior wall, 13'-6" east of the garage west exterior wall, and supports roof and second floor dead
and live loads. Examination of the column revealed no evidence of measurable displacement at the top or bottom
connections. No deflections, dents, scrapes, or fractures were observed along the length of the column that would
be considered consistent with a vehicle impact.
Vertical cracks were observed on the south face of the column. The location and orientation of the cracks are
inconsistent with a vehicle impact. However, the vertical orientation of the cracks, the relatively thick dimension of
the member,the lack of similar cracks on the 3 other sides of the column, and the lack of splintering or other cracks
extending from the main line of vertical cracks, indicate these observed vertical cracks are a condition known as
checking. Wood checking is caused by uneven drying and subsequent shrinkage of the wood material, and is an
expected occurrence already accounted for in general, common practice wood design methodology.
Therefore, based on the observed patterns of wood checking, and the lack of evidence of recent damage from a
vehicle impact,the structural capacity of this garage column has not been reduced from the original intended design
and remediation of the column is not required.
case4n6.corn(jensenhughes.corn
Chau Residence—Response to Inspection Report CRSE
Record ID: [NGT2O17'UO347/File Number: Date:201607/ 11/Q�!017 FORENSICS
.^.SE° COMPANY'
CASE reserves the right to supplement or amend this letter should additional information become available. If you
have any questions or comments regarding any element of our|ettor, please do not hesitate to contact us at 503-
736-1106.
Respectfully Submitted:
84174PE
^a- ;w~-" '
OREGON
/(L/3'//7
Michael A. BnamhaU, PE, SE, LEED®AP
Senior Structural Engineer
CASE Forensics
Page 2 of 2