HomeMy WebLinkAboutFoundation Observation 07.02.1981•
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1 irico f
Pi) Or, 1'1.'2
6: :MI,
Al Nelson:
15358 St. fiwy. 133
Carbondale, CO 81623
JulY 2, 1.981
fl a: Pile No. 39930 -CS
Visual Inspoctic,n
Nelson Pcnidere
2115 117 Road
CJrcfiold County, rolorado
Dent Mr, Nelson:
The .fciUndation excavation at the si to referenced above has
been inntmeted by porSonnel of this laboratory to determine
siiirfacctII CO.1 COnd Po 11 owi nrj are :recommend ti
for thin site:
Soil Claw-ifIcation 'Soiln on this site wore round to consist
of silty clay. These soils have moderato expansive prope-ftien.
An expansion pronnure of 848 puf with a 3.1% volumo cN-0-,4a and
17.3% moisture inOreaso wan determinc,d by laboratory
Average bearing values O( the soil aro 2800 psi maximnm and
050 minitqlql doad load.
Man -Made If any. portions of this building are to be
placed on man -mode filL the foundations must extend throuqh
this fill
Moisture Conditions:at Timepf Inspection: Low to moderate.
ponndationTvpo PecoMMended: The standard continuous spread
footing t000mMended for this sito.
13einforcing:
Thi should consist of five #5 rebarn, with three
near tho top of the foundation wall, all continuons around Cho
foundation with no gaps or breaks.
prainago_and_rirading: Orading should be no c igttn.ted that
Colorado 41iirtp, COtororio
Puoblor Colorado Grand Junction, Crilorado
Gletw000d Spetim, tAwatio Evanston, Wyoming
Al Nelson
2135 117 Road
Oarfield County, Colorado
July 2, 1W11
Page! -2-
n11 runoff moisturn is romovod from Cho vicinity of thn
building rapidly. Wator should noL he altownd lo stand
Or pond in aroan of haol:fil1.
it is reCommondod that a poriphoral drain Lo construotoa
around tho living arna of this strut -turn. f3n0 antail Shoot.
Additional #5 robars Should bo plavnd at zl'j° at any stops
in the foundation wall, and all roinForcing alould havo t
minimum lap of 15 inohos.
Roof drainFl must ho rorriod nwny rrnm tho building at loant 5'
pant any backfill. Wat(n- :ha 11 not bo allowod lo stand or
pond noir iho building during or aftor (1;:i:rnction.
shall not floodnd durHg or oftor oonslruolion.
icJJ 31
All haohlill shall he compactod to a minimum of 90% of tho
ma-g.imum Prootor Oonnity, ASM D-6911. Mo. Only cr:ooption to
this will tho componnuts of tho mriphoral drain, ir any.
If quostions nrirjo, please foe] frog to contnct our offien
.it ywnr couvnnir.nce.
Pospootfully submittnd,
L1MC0LN-Dr‘JTOPE TESTING LABORATORY, TNC.
e.
fly: St (Ix/cm . /66
Senior Sniin Tochnlcian
SCO/dis
Enclosnlo
FLAW&
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WALL.. DEPT). VA*110
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0.eAlAr AS SHOWN.
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FILTre FRerIC MAY Bi ANY rVPr,
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FLOOR.
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NOTES:
.Size of perforated pipe sand filter varies with amount of seepage expected. 411 diameter is
most common.
. Gravel sire depends on size of pipe perforations: 8 gravel > 2 x diameter of perforation.
. Sand filter must depend on native soil and must follow the Terza;;hi-Vicksburg Criteria:
1) 15 filter- 41. 2) 151., filter < 4 3) 50 , filter
15 base 5 btse 5• base - 12 to 58
This is required for stability and length of filter life. The sand filter may be replaced
with an approved filter :fabric.
. A11 pipe to be perforated VCP, PVC or Orangeburg.
.4" flexible pipe may be used to depth of 41 feet, but must be carefully graded. 311 flexible
pipe inay be used to a depth of 7 feet and should be carefully graded.
. Rigid pipe only to be used below a depth of 7 feet below ground surface.
. A11 pipe to he laid at a minimum grade of 1.4% around building foundations.
,Outfall to be free, gravity outfall if at all possible. Use sump and pump only if no
gravity outfall exists.
.Conditions can vary considerably, and each site may be variable as to quality of sand or
gravel required. All sites should be inspected to determine the amount and quality of
sand filter required, unless a filter fabric installation is used as shown.
TYPICAL SECTIONS
PERIMETER DRAIN & FRENCH DRAIN
LINCOLN
DeVORE
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GEOLOGISTS
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