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10262 SE Bristol Lane SEP 1 4 2017
Happy Valley,OR 97086
CITY OF TIGARD
BUILDING DIVISION
September 6, 2017
Adam Haupt,Contractor
15292 SW Royalty Parkway,Apt. D21
Tigard,OR 97224
Re: Basement Window Installation
10010 SW Garrett,Street.Tigard,OR
Dear Adam:
At your request, a site visit was conducted this afternoon, Wednesday September 6, 2017 for the
purpose of assessing an enlarged window cut-out in the southerly side of the basement. The new
window opening is purported by you to be the same widtlias the original with the bottom extended
by roughly one foot. What follows is an assessment of existing conditions in light of original
construction.
Observation: The site is within a residential neighborhood and supports a single story wood
framed, single family residence with a full basement. Original construction reported by you was
1948.The basement area consists of a perimeter concrete basement wall providing support for the
exterior walls, floor framing and a hip roof system with composition roofing. Original lath and
plaster cover much of the interior walls and ceiling. Exterior dimensions of the residence are
roughly 26' x 30'. The concrete basement wall is roughly 6,-h" high and retains roughly 6'-0" of
soil. The window in question is along the southerly wall and was recently extended in height to
accommodate an egress window within a proposed bedroom with a bottom sill height of roughly
3`-h ` above the existing concrete floor. Tbrvviodnwdinaeosionio3`-[y` x3`-O" andr000poroUd
with the floor framing spaced at |6" on center. The inside surface of the basement wall has been
patched with a cementitious skim coat. A furred out 2x4 wood stud wall has been installed as part
of an on-going remodel pject and is currently unsheathed.
Conclusions: The southerly exterior wall of the basement sees relatively light live and dead loads
in the order of 450 pounds per linear foot. The header across the window opening is original and
adequate to support gravity loads. Extending the window depth to a lower level,accomplished by
means of the egress access on the exterior of the window, has actually removed hydrostatic soil
loads and reduced stresses on the wall strips on each side of the opening. /\ou result I see an
improved condition from a soil-wall interaction.
criiieer on callPage 1
. . ,
September 6,2017
Adam Haupt,Contractor
Re: Basement Window Installation
Page two
Based on the findings presented in this assessment it is my professional opinion that the extended
concrete cut on the southerly basement wall to accommodate an egress window does not
compromise the structural integrity of the wall around the opening. Proper drainage practices for
landscaping near residential foundation walls should be adhered to, which are beyond the scope of
this report.
My site visit and subsequent observations,assessment and conclusion is based on a limited visual
observation of the interior and exterior of the home and associated foundation and does not include
any warranties as to the structural integrity of the superstructure, nor to any defects that cannot be
seen and are considered "covered up". My site visit also does not include any warranties as to the
site and soils that are considered geotechnical. Further investigation may be warranted if
additional concerns of the foundation wall become apparent under reasonable observation
performed by the homeowner.
If you have any questions regarding this report or its findings,please feel free to contact my office.
411 ,OD PROp4j,
Mark egener, PE
79633PE -
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OiON
EXP 06/30/2018
engineer on call
pnge 2
OFFICE COPY
CITY OF TIGARD
REVIEWED FOR CODE COMPLIANCE
Approved:
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