APPENDIX B
GROUND POLE INSTALLATION (1.2m System)
1.2m Antenna Survival Windloads at 125 MPH Velocity
2.88" or
3.00" O.D.
2.88" or |
3.00" O.D. |
FH
40.9" HEIGHT (1039 mm)
MT
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| IS |
| X | |
| A |
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| M |
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EA |
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B |
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16.97o |
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OFFSET | MECHANICAL AXIS | |
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(NORMAL TO ANTENNA FACE)
FH = Horizontal Force
FV = Vertical Force
MT = Torsional Moment
L | ANT |
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C |
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| 1" to 2" | 40.9" |
35.8" | SLOPE FOR |
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WATER RUN OFF |
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72" | GRADE |
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| 40" |
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#3 REBAR x |
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DIA. OF PIER |
| d |
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INSERT THRU HOLE |
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| BELOW |
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| MIN. |
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IN TUBE & CENTER |
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| FROST LINE | ||||
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DIA.
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| 1" to 2" | ||
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| 35.8" |
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| SLOPE FOR | ||||
NOTE: |
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| WATER RUN OFF | ||
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72" |
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| GRADE | ||
50" depth may be |
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increased, |
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concrete and |
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length of rebar |
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| 50" |
will increase |
| (SEE | |
accordingly. |
| NOTE) |
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| 2" |
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#3 REBAR x DIA. OF PIER, INSERT |
| APPROX. | |
THRU HOLE IN TUBE & CENTER |
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(4)#3x24"MIN. | d |
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AT 90o APART | 2" |
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MIN. |
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(SEE NOTE) |
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DIA. |
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| BELOW | |
FROST LINE
MO = Overturning Moment
PIER FOUNDATIONS | DEEP FROST LINE FOUNDATIONS | ||
Exposure “B” | Exposure “C” | Exposure “B” | Exposure “C” |
FV MO
ELEVATION DEGREES |
| FORCE (POUNDS) |
| MOMENTS | |||
MECHANICAL | BEAM |
| F | F |
| M | M |
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| GROUND |
ANT | WIND VEL. | DIM “d” | CONC VOL. | DIM “d” | CONC VOL. | DIM “d’ | CONC VOL. DIM “d” | CONC VOL. | POLE | |
| 80 MPH | 8” | 1.3 | 13” | 3.4 | 8” | 1.6 | 10” | 2.5 | “A” or |
| 90 MPH | 10” | 2.0 | 16” | 5.1 | 8” | 1.6 | 12” | 3.6 | “B” |
1.2M | 100 MPH | 12” | 2.9 | 18” | 6.5 | 8” | 1.6 | 13” | 4.2 | “B” or |
LFL | 110 MPH | 14” | 3.9 | 21” | 8.8 | 10” | 2.5 | 16” | 6.4 | “C” |
| 125 MPH | 17” | 5.8 | 24” | 11.5 | 12” | 3.6 | 19” | 9.0 | “D” |
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| H |
| V |
| T |
| O |
0 | 17 | 1285 | 500 | 4,380 | ||||
10 | 27 | 1217 | 488 | 4,148 | ||||
20 | 37 | 1182 | 464 | 4,029 | ||||
30 | 47 | 1071 | 421 | 3,650 | ||||
40 | 57 | 943 | 357 | 3,214 | ||||
50 | 67 | 822 | 299 | 2,802 | ||||
60 | 77 | 686 | 232 | 2,338 | ||||
70 | 87 | 515 | 178 | 2,096 | ||||
Mo Based on 40.9" (1039 mm) from Mounting Surface of Center Line of Antenna
Values shown represent maximum forces for any wind direction and include 1.5 Fs. Height and exposure factors from uniform building code are NOT included.
POLE SPECIFICATIONS:
Ground Pole “A” = 2.88 O.D. x .154 Wall (Sch 40) x 72” ASTM A53 or A501 Pipe Ground Pole “B” = 3.00 O.D. x 9 Ga. (.148 Wall) x 72” Steel - CM PN 611685101
Ground Pole “C” = 2.88 O.D. x 2.88 O.D. x .276 Wall (Sch 80) x 72” Steel ASTM A53 or A501 Pipe Ground Pole “D” = 3.00 O.D. x .250 Wall x 72” Steel ASTM 120 Mech Tubing
NOTE:
Pole “B” is supplied from factory powder painted and with hole for #3 rebar and grounding screw.
Poles “A”, “C” and “D” are not supplied and must be field drilled ⁵⁄₈” dia. for #3 rebar and drilled .218
for
1 - Pole and foundation design based on the following criteria:
a)Uniform building code exposure B or C and 1.5 stability factor.
b)Vertical soil pressure of 2000 pounds per square foot.
c)Lateral soil pressure of 400 pounds per square foot.
d)Concrete compressive strength of 2500 pounds per square inch in 28 days.
Ground Pole
Must Be
Vertical In
All Directions
Within .19 Inches
At Top (0.3ß)
Bubble
Level
2 - 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 1. You should consult a local professional engineer to determine your soil conditions and appropriate foundation.
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