HomeMy WebLinkAboutPermit Field Test & Inspection Report 1993-8-19
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19 August 93
Branch
Engineering
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Tom Marx
City of Springfield
Planning and Development
225 North Fifth
Springfield, OR
310 North 5eh Serest
Springfield, Oregon 87477
(503J 746-0637
FAX (503J 746-0388
97477
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Re: Foundation soils, lot 138 and lot 139, McKenzie Hills,
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We have inspected the above sites and have found the soils are clayey with several seeps under
the proposed house location. To prepare the site for construction, and to protect the house from
soil-induced stress, we recommend the following: .
1, Existing seeps are trenched to drain on the downhill side of the house pad site, The
trenches should be fonned in a wide "V" approximately 18" deep at the base and 48"
wide at the top, They should slope to drain at not less than 2% (1'/4" per ft.)
2, The trenches should be backfilled, and the entire pad site filJed to a depth of 12", using
. 3/4" -(0) or 1" -(0) crushed quarry rock.
3. The entire pad should then be rolled, using a fully-loaded rock truck or 12-ton rated
roller compactor, making multiple passes until maximum consolidation is reached.
4. A proofing roll will be obselVed by a representative of the engineer's office, and an
inspection report will be sent to the City.
5. The perimeter foundations shall be reinforced accOrding to the attached drawing, The
garage floor slab shall be reinforced using #4 bars at 24" o,c. each way, at mid depth
of slab. The reinforcing shall be tied in place, using "dobies" or other means of ensuring
proper placement.
6, . The floor system using post-and-beam should be changed to a joist system with strip
footings, or the piers for the post-and-beam be installed as 8" x 12" strip footings, with
(1) #4 bar at the centerline of the footing. This will control differential movement in the
floor system,
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TRANSPORTATION
CIVIL
SURVEYiNG
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UNDISTURDED NATIVE CLAY SOIL. ~ fiTi+IlLU11 I I I I I - 11'1
CONVENTIONAL STEMItIALL -ON-FOOTING
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UNDISTU!<BED NATIVE CLAY SOIL. -\" II , ' I I I I I ,- 'Tn,
MONOLITHIC STEMItIALL -AND-FOOTING
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-.AUG-19-1993
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FROI_RANCH ENG I liE~R I NG
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1/2' X 10' A.B. @ 72' MAX SPACING -
B' X II, FOUNDATION VENTING PER CDot:
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CONTINUOUS REINFORCING.
III H4 BAR I' BEL.OW VENT UNE
112' BEL.OW TOP OF WA!.L.. MAX.!
AND III H4 BAR 3' AWVE BASE
AT CENTERl.INE OF FOUNDATION WAL.L.
H3 DOWEL. AT 72' O,C, <AT All.
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12' COMPACTED GRAVEL. BASE
1/2' X 10' A.B. e 72' MAX SPACING
8' X Ib' FOuNDATIOU VENTlUG PER CDot:
CONTINUOUS RE/uFORCING.
III H4 BAR I' BEL.OW VENT UNE
02' BELOW TOP OF WA!.L, MAX.!
AND (I) #4 BAR 3' ABOVE BASE
AT CENfE'<l.INE OF FOUIJDATION WA!.L
12' COMPACTED GRAVEL. BASE
MINIMUM DIMENSIONS
I MARK I DESCRIPTION
I W I FOOTING WIDTH
I H STEM WAll. HEIGHT
TI I STEMWALL THICKNESS
I T2 I FOOTING THIQ(NESS
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24'
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2-S TORY
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NOTES.
I. CQ>JCRETE MINIMLI'1 COMPRESSIVE STRENGTH (28 DAYS) TO BE 3SOO PSI. AIR ENfRAINMENT SX, USE NO ACCEL.ERANTS.
2. USE GRADE .0 BARS WHEI2E BENT FOR DOHEL.S, AM) GRADE 00 BARS FOR TOP AND BOTOM CONTlNlJQJS STEEL.
3, L.AP BARS AT SPL.ICES A MINIMUM OF IS' OR 30 DIAMETERS FOR CONTlNUI1'Y.
.. TIE BARS WITH SOFT WII2E TO PREVENT L.OSS OF CONTACT OR DI5Pl.AceMENT OURING POUR
S. USE NO MORE THAN A .' 5l.l.\'1P IN ;HE CONCRETE. EXceSSIVE WATER REDUCeS STRENGTH AND INCREASES POROSITY,
b. USE A P\..NP TO PL.Ace CONCI2ETE IN FORMWORK,
CONCRETE SHOUl.D NEVER BE fRANSPORTEO L.ATERA!.L. Y DUE TO SEGREGATION OF AGGREGATES
FOUNDATION WALLS
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DATE 2JJUl93 SCAL.E NONE
DVN S. KEATING REVISIONS
CW'O
PROJECT NO.
PROJECT TITL.E
LOW FOUNDATION WALLS
FOR PLACEMENT OF FILLS OVER CLAY SOILS
tD\ Branch EnQineerinQ
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Sprlnefi.rd, O,.\iI<.... '7-471 ($03) 7.'.06$7
SHEET
OF
TOTAL P, 83
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MEMORANDUM
August 27. 1993
TO:
Building Division
FROM:
Planning Division, Mel Oberst
RE:
Building Permits for Lots 137, 138 and 139
McKenzie Hills First Add
Glen Kotara
These lots are in the Hillside Development Overlay District. Pursuant to Section 26,080(1)
front. side and rear yard setbacks may be reduced (to zero if necessary) in order to retain
trees, protect natural features and minimize activities that adversely affect scenic qualities,
slope and soil stability and drainageways. The reductions in setbacks for these lots has been
approved by the Director to preserve exiting trees and minimize cuts in the hillside. Dwelling
and garage setbacks may be adjusted to avoid uncessary excavation or tree removal. Glen
Kotara has submitted survey drawings of the lots and the setbacks needed to achieve the
goals of protecting the landscape. If you have any questions please contact me.
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I REGISTERED
PROFESSIONAL i'"
lAND SURVEYOR .
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,JAMES F. UDaL~
Engineering & Surveying
3Z3ll8 BEAUN ROAD
1.EaAN0N. OREGON 9736$
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