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SPECIAL INSPECTION—FINAL SUMMARY LETTER
07/16/18
Mr. Mark Van Domelen
City of Tigard, Building Department
13125 SW Hall Blvd.
Tigard, OR 97223
RE: Coffins Residence Underpinning
13739 SW Lauren Ln.
Tigard,OR 97223
Permit#MST 2018-00160
Dear Mr. Van Domelen:
This letter certifies that we have performed special inspection of the referenced project, in accordance with
Chapter 17 of the International Building Code. Special inspection has been performed on (40) helical piers
as shown on the permit documents.
On June 6th 2018, a representative of i.e. Structural observed the installation of(8)Foundation Supportwork
Incorporated model HP288 helical piers,as shown on structural drawings.All helical piers reached or exceeded
the specified installation pressure and the minimum penetration depth specified on structural drawings. Load
testing was performed on piers(4)through(12)in accordance with ASTM method D1143(Quick Method),and
passed the creep acceptance criteria. i.e. Structural has reviewed the installation logs of the remaining piers
and confirmed them to be acceptable.
Special inspections have been provided to meet the requirements of the building code and do not constitute
a guarantee of the installed work. It is the responsibility of the contractor to execute the work in accordance
with the structural drawings.
If you have any questions or need further information,please call me.
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Sincerely, �9EV PR0P&,
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Dennis Nguyen 3626
Inspector �► OREGON
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