HomeMy WebLinkAboutPermit Field Test & Inspection Report 2007-8-20
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K & A Engineering, Inc.
3327 Roanoke Ave., Eugene, OR 97408
(541) 684-9399 Voice
(541) 684-9358 FAX
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August 20, 2007
Project: 151.06
Hayden Enterpnses, Inc
2464 SW Glacier Dnve #110
Redmond, OR 97756
SUbject' Jasper Meadows subdlvlslon--Lot 262 .- 57q I ~V'V\I(("
Springfield, OR
Foundation SOils
PURPOSE AND SCOPE
At your request, K & A Engineering, lnc, has completed a geotechnical investigation of the eXisting sOils on the
subject property, Our understanding is that a wood-framed single-family residence supported by a cast-In-
place concrete spread footing foundation IS proposed for construction on this site
The purpose of our investigation was to determine the suitability of the sOils for construction of the proposed
structure, and provide recommendations for construction of the foundation The scope of our services is limited
to general sUitability with respect to beanng capacity and expansive sOils
FOUNDATION PAD PREPARATION
The project site IS located on a residential lot In the new "Jasper Meadows" subdivIsion The lot IS mostly level
and there are no apparent slope movement hazards
Foundation preparation Involved constructing a level foundation pad on native undisturbed sOils This reqUired
excavating and removing unsuitable soils from the foundation pad area After the excavation and removal of
these salls, approximately 1 Q-foot of %-inch minus dense graded crushed aggregate was placed and
compacted over 8-lnch minus "pit run" fill The "pit run" typically consisted of a dense graded crushed gravely
silt with cobbles up to 8-inches This served to provide a uniform surface for footing construction The fill
matenals were placed and then compacted uSing a vibratory steel drum roller
We tested the In-place density of the crushed aggregate fill and have determined that the average dry density
exceeds 95% of maximum as determined by ASTM 0698 The field test results are attached to thiS report
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K & A Engineering, Inc.
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SUMMARY AND RECOMMENDATIONS
The project site, as prepared, IS sUitable to support the proposed foundations We recommend a design
allowable beanng capacity of 2,500-pounds per square foot
The sOils present a moderate shnnk/swell hazard, Foundation loads should bear on undisturbed native silts a
minimum depth of 36-lnches below final grade around the perimeter foundation The prepared foundation pad
meets these recommendations
Final grading around the foundation pad should raise the grade above the foundation uSing native or Imported
silts and should slope away from the foundation
We recommend approval of the foundation pad, as constructed, by the building official
Thank you for the opportunity to be of service Please call us If you have questions or need further assistance
Respectfully,
Steve Schultz, E I.T
K & A Englneenng, Inc
EXPIRES DEe' 3 0 200~
Client Hayden Enterprises Jasper Meadows-Lot 262, Springfield, OR
Project' 151 06
Page 2 of 2
August 20, 2007
Density of SOIl and Soil-Aggregates In-Place
ASTM 02922 and 03017
Project: 151 06
Site Address: Jasper Meadows--Lot 262
Permit No:
Date: 8/16/2007
Density Test Type': DT-4,6
Operator: SS
Material Type: 3/4" (-) from Springfield Quarry
I Maximum Dry DenstlY, pcf 1280
Standardization and Reference Check A Density
(Standard Deviations) (S.D.) 0.89
A Moisture,
(S 0:)
1 76
Moist Dry
Density, Density, Water Compaction,
Test No. pcf pcf Content, % % Remarks
1 1424 1333 68 1042%
2 128.1 1192 75 931%
3 1324 1230 76 961%
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Average, 97 8%
Std Dev, 572%
1 Direct Transmission (DT) (specify depth, In) or Air Gap Backscatter (AGB) (speclfly(T)ouchable or (U)ntouchable
mode
Test performed uSing Seaman Nuclear Corp model C-300, SN 21113
Chent Hayden Enterprises, Inc
Project. 151 06
K & A Engineering, Inc.
11/19/2007