HomeMy WebLinkAbout1603 E Alton Ave - Soils ReportI
EDWARD J. NELA,\DER & ASSOCIATES
2372 N. Glassell St., Unit H
0range, California 92665
CO]-IPACTION REPORT
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Job No.
1603 41 ton
Santa .{rra, Cal i fo
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Job No. 74-lZ2-2 Page 1
I \TRODUCTI O\
This report presents the results of the density tests
perforned on the property located at 1603 Alton Avenue in
the City of Santa Ana, California.
Planned for construction is a Iight industrial tilt-up
building. The structures are to be supported on conventional
continuous and pad footings with slab-on-grade concrete floors.
){o Foundation Soils Investigation was prepared by this
firn. PIease refer to the letter of responsibility dated
August 20. 1974.
FIELD TESTING AND OBSERVATIONS
As part of the clearing operation' all vegetation and
debris l{ere renoved from the site. Tree roots rere renoved
by hand to a depth of 6 feet.
As preparation for receiving fi11r the natural ground
was undercut to a depth of 5-l/2 to 7 feet to remove a black
corupressible peat, uhich rias removed fron the site, The
botton was then scarified to a depth of 6 inches, compacted
and tested. The soil was then considered suitable to suP-
port the fill and the proposeC structures.
The fill was placed in lifts of 6 inch thickness and
compacted by neans of a 6 x 6 sheepsfoot roller and by means
of wheelrolling with loaded scrapers. The north footing was
undercut below the existing storn drain. The footing should
I
Job No. 74-l2Z'2 Page 2
be placed to a depth allowing for the dissipation of footing
loads, having no effect on the storm drain. The depth of
the footing will be determined by the factor of a 45 degree
angle fron the bottom of the footing. This angle should
provide for dissipation of loads into undistured soi1s.
Footing designs will be furnished by Floyd weaver Structural
Engineers, our reconmendations are included in this report.
The required moisture was supplied by a fire hose. The
filI material consisted of both on-site and inported soils.
The on-site material consistcd of a sandy silty clay vhile
the import nay by classified as a redish brown sand.
The density of the soil was deterrnined in accordance
with A.S.T.M. Test Methods D-1556-64T and D-2937-71. The test
results r{ere conpared to the naximun density as determined
in the laboratory in accordance with A.S.T.l'1. Test ltletho<I
D-l557-70T rnodified to use three layers in lieu of five. The
results of the tests are presented on the attached "Tab1e of
Test Results" with their approxirnate locations shown on
attached plot p 1an.
LABORATORY TESTING
The on-site
on the basis of
ary neasures for
required.
rnaterials and inport are non-expansive
soit classification and the usual precaution-
expansive soil conditions will not be
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Job ){o. 7 4-]-?Z-?Page 3
RE}IARKS AND RECOI\}IENDATI ONS
Foo t ings and BearinE
The soils encountered during the grading $ere essentially
sandy silty clay and inPort a redish brown coarse sand. As
a result, footings nay be designed for an allowable bearing
value of 4,400 pounds per square foot for continuous footing,
provided they are placed to a ninimum width and depth of 18
inches and 5r100 pounds for isolated footings. An increase
on 1/3 of the above bearing value for short duration load-
ing is perurissible. S€a Plate rAr for tlrea.r t€8t roaults.
Concrete Slab Construction
The ground water table was not reached in any of the
grading and, as a consequence, ground water is not expected
to be a problenr on this project. The use of rock base under
floor slabs rnay be onitted.
Linits of Certification
This report covers the grading perforned between the
dates of August 13, 1974 and August 24, !974.
Gene ral
The grading performed on this site was done in an
acceptable manner and in conformance with the Building Code
and the City of Santa Ana and in confornance with the stand-
ards specified by Federal Housing Administration. The
results of testing indicate that the fill has been conpacted
a
Job No. 74-LZ2-Z Page 4
ao at least 90 percent except at the botton of the undercut
xnere 85 percent of maximum density rras required.
This report is issueJ with the understanding that it is
the responsibility of the ohrter or his representative to
ensure that tlle information and re conrnendati ons contained
herein are called to the attention of the Project Architect
and Engineer and are incorporated into the plans and
specifications and that necessary steps are taken to see
that the contractors and subcontractors carry out such
re conmendat ions .
Respectfully s ubni t ted,
EDWARD J. NEL,L\DER & ASSOCIATES
4 ,lzrL-.-e-
14l ande rEdward J.
President
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Dale E. Goss, P.E.
CJ.VJ']. Engtreet, C'12037
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