14110021Exising footing 1,000 psf
h„ -..,,n i ., +; , (Fl Footing
CASE
9 -FOOT 9 -INCH SQUARE FOOTING
CENTERED AT 10 -FEET FROM SHORING
Exising footing
k-;- i ., +; (F) Footing
CASE J
6 -FOOT STRIP FOOTING
AT 1 -FOOT FROM SHORING
Not To Scale
Note:
1. Horizontal pressures calculated based on 1 ksf uniform bearing pressure
from footing.
2. Apply surcharge pressures over a distance of 14 feet from either side of
the footing.
PRIMARY DIVISIONS
TYPE
GRAVEL
SECONDARY DIVISIONS
BOULDERS
FINE
CLEAN
GW
FINE
Well graded gravels, gravel—sand mixtures, little or no fines
O o
GRAVELSGRAVELS
MORE THAN HALF
yess than Fines)
GP
o p°
Poorly graded gravels or gravel—sand mixtures, little or no fines
N �R
OF COARSE FRACTION
GRAVEL
GM
OVER 32
Silt grovels,
9 gravel—sand—silt mixtures, plastic fines
Is LARGER THAN
No. a SIEVE
Ip �Y
aZ H—,
WITH
FINES
GC
Clayey gravels, gravel—sand—clay mixtures, plastic fines
CLEAN
SANDS
$yy
Well graded sands, ravel) sands, little or no fines
9 gravelly
w"
w
V)
� w
s
SANDS
THAN
(Less than
5i Fines)
SP
Poorly graded sands or gravelly sands, little or no fines
�
MORE HALF
OF COARSE FRACTION
U
IS SMALLER THAN
NO. 4 SIEVE
SANDS
SM
Silty sands, sand—silt—mixtures, non—plastic fines
WITH
SIC
Clayey sands, sand—clay mixtures, plastic fines
FINES
ML
Inorganic silts and very fine sands, rock flour, silty or clayey fine
o
sands or clayey silts with slight plasticity
CL
Inorganic clays of low to medium plasticity, gravelly clays, sandy
paN
SILTS AND CLAYS
Xo
LIQUID LIMIT IS LESS THAN 50
clays, silty clays, lean clays
OL
—
Organic silts and organic silty clays of low plasticity
zoL4
MH
Inorganic silts, micaceous or diatomaceous fine sandy or silty
soils, elastic silts
CH
Inorganic clays high
9 9 plasticity, fat clays
z�
SILTS AND CLAYS
LIQUID LIMIT IS GREATER THAN 50 x
OH
Organic clays ays of medium to high plasticity, organic silts
tl 3
HIGHLY ORGANIC SOILS
PT
,
Peat and other highly organic soils
DEFINITION OF TERMS
U.S. STANDARD SIEVE SIZE CLEAR SQUARE SIEVE OPENINGS
200 40 10 4 3/4' :%' 111"
SILTS AND CLAY
SAND
GRAVEL
COBBLES
BOULDERS
FINE
MEDIUM
COARSE
FINE
COARSE
U.OtI 0.4 2 5 19 76mm
GRAIN SIZES
SAND AND GRAVEL
BLOWS/FOOT•
VERY LOOSE
0-4
LOOSE
®SPLIT
SPOON
B
MODIFIED CALIFORNIA H TER
' SHELBY TUBE
® NO RECOVERY
VERY DENSE
STANDARD PENETRATION
SSANMPLER
1-2
8-16
VERY STIFF
SAMPLERS
16-32
HARD
SAND AND GRAVEL
BLOWS/FOOT•
VERY LOOSE
0-4
LOOSE
4-10
MEDIUM DENSE
10-30
DENSE
30-50
VERY DENSE
OVER 50
SILTS AND CLAYS
STRENGTH+
BLOWS/FOOT•
VERY SOFT
0-1/4
0-2
SOFT
1/4-1/2
2-4
MEDIUM STIFF
1/2-1
4-8
STIFF
1-2
8-16
VERY STIFF
2-4
16-32
HARD
OVER 4
OVER 32
RELATIVE DENSITY CONSISTENCY
*Number of blows of 140 pound hammer falling 30 inches to drive a 2—inch O.D. (1-3/8 inch I.D.) split spoon (ASTM D-1586).
+Unconfined compressive strength in tons/sq.ft. as determined by laboratory testing or approximated by the standard penetration
test (ASTM D-1586), pocket penetrometer, torvane, or visual observation.
KEY TO EXPLORATORY BORING LOGS
Unified Soil Classification System (ASTM D-2487)
LO"EYASSOCIATES
Environmental/Geotechnical/Engineering Services
FIGURE A-1