GROUND POLE INSTALLATION - 4.50” O.D.
16.7"
50"
96"
50"
C
L
55.5"
96"
50"
1" to 2"
SLOPE FOR
WATER RUN OFF
66"
2"
2"
APPROX.
4.5 O.D. (114.3mm)
4.5 O.D. (114.3mm)
ANT
1" to 2"
SLOPE FOR
WATER RUN OFF
GRADE
GRADE
BUBBLE
LEVEL
BELOW
FROST LINE
BELOW
FROST LINE
#3 REBAR x
DIA. OF PIER
INSERT THRU HOLE
IN TUBE & CENTER
#3 REBAR x DIA. OF PIER
INSERT THRU HOLE IN
TUBE & CENTER
Ground Pole
Must Be
Vertical In
All Directions
Within .25 Inches
At Top
(6) #3 x 24" MIN.
AT 60˚ APART
(SEE NOTE)
SEE
NOTE
d
MIN.
DIA.
d
MIN.
DIA.
NOTE:
66" may be increased,
concrete and length
of rebar will increase
accordingly.
WIND VEL.
DIM “d”
CONC VOL.
DIM “d”
CONC VOL.
GROUND POLE
Inches (mm)
CUYD (Cu Meter)
Inches (mm)
CUYD (CU Meter)
100 MPH
30” (762)
.80 (.61)
24” (610)
.70 (.54)
“A”
125 MPH
37” (934)
1.2 (.92)
30” (762)
1.0 (.76)
“B”
PIER FOUNDATIONS
DEEP FROST LINE FOUNDATIONS
POLE SPECIFICATIONS:
Ground Pole “A” - 4.50 O.D. SCH 40 (4.026 I.D.) Steel - (Metric = 114.3 O.D. x 102.3 I.D. mm)
Ground Pole “B” - 4.50 O.D. SCH 80 (3.826 I.D.) Steel - (Metric = 114.3 O.D. x 97.2 I.D. mm)
NOTE:
1. Poles are not supplied (purchased locally to ASTM A501) and must be field drilled
⁵⁄₈
Dia. for M10 #3 rebar, drilled .218
(5.55mm) for
¹⁄₄
-20 self tapping grounding screw and galvanized or painted for protection.
2. Pole and foundation design based on the following criteria:
a. Uniform building code Exposure C and 1.5 stability factory.
b. Vertical soil pressure of 2000 pounds per square foot. (9765 Kilograms/meter square)
c. Lateral soil pressure of 300 pounds per square foot. (1465 Kilograms/meter square)
d. Concrete compressive strength of 2500 pounds per square inch (176 Kg/Cm
2
) in 28 days.
CAUTION: The foundation design shown does not represent an appropriate design for any specific locality, since soil
conditions vary and may not meet design criteria given in Note 2. You should consult a local professional engineer to deter-
mine your soil conditions and appropriate foundation.
3
