La d – Channel Master 900 User Manual
Page 5
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L
A
d
36
(B)
1" to 2"
SLOPE FOR
WATER RUN OFF
GRADE
#3 REBAR X DIA. OF PIER,
INSERT THRU HOLE IN
TUBE & CENTER
BELOW
FROST LINE
MIN.
DIA.
NOTE:
Clearance
increases at
elevations
greater than 23˚.
3" O.D.
PIER
FOUNDATIONS
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L
A
d
48"
(B)
1" to 2"
SLOPE FOR
WATER RUN OFF
GRADE
#3 REBAR
LENGTH = d MIN LESS 1"
INSERT THROUGH
HOLE IN TUBE & CENTER
(4) #3 x 24" MIN.
AT 90˚ APART
(SEE NOTE)
BELOW
FROST LINE
MIN.
DIA.
NOTE:
48" may be
increased, concrete
and length of rebar
will increase
accordingly.
3" O.D.
DEEP
FROST LINE
FOUNDATIONS
,
,
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(SEE NOTE 2)
1-1.5"
APPROX.
2"
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OPTIONAL
GROUND POLE INSTALLATION
3” O.D. x 68” & 72” LONG
ANT
WIND VEL.
DIM “L”
DIM “A”
DIM “d”
CONC VOL.
DIM “L”
DIM “A”
DIM “d”
CONC VOL.
GROUND POLE
80 MPH
9”
1.5 FT
3
7”
1.2 FT
3
90 MPH
11”
2.2 FT
3
7”
1.2 FT
3
.90M
110 MPH
68”
37”
13”
3.0 FT
3
68”
37”
8”
1.5 FT
3
Mo. 611652731
110 MPH
15”
4.0 FT
3
10”
2.4 FT
3
See Note 2
125 MPH
18”
5.8 FT
3
12”
3.5 FT
3
80 MPH
10”
1.8 FT
3
7”
1.2 FT
3
90 MPH
13”
3.0 FT
3
8”
1.5 FT
3
1.0M
110 MPH
68”
37”
15”
4.0 FT
3
68”
37”
10”
2.4 FT
3
Mo. 611652731
110 MPH
17”
5.2 FT
3
11”
2.9 FT
3
See Note 2
125 MPH
20”
7.2 FT
3
14”
4.7 FT
3
80 MPH
14”
3.5 FT
3
9”
1.9 FT
3
90 MPH
17”
5.2 FT
3
11”
2.9 FT
3
1.2M
110 MPH
72”
39”
19”
6.5 FT
3
72”
39”
13”
4.1 FT
3
Mo. 611685101
110 MPH
22”
8.7 FT
3
15”
5.4 FT
3
See Note 2
125 MPH
25”
11.2 FT
3
19”
8.7 FT
3
PIER FOUNDATIONS
DEEP FROST LINE FOUNDATIONS
POLE SPECIFICATIONS:
3” O.D. x .120 Wall x 68” Long Steel w/Powder Paint Finish - CM PN 611652731.
3” O.D. x .148 Wall x 72” Long Steel w/Powder Paint Finish - CM PN 611685101.
1. Pole and foundation design based on the following criteria: (a) Uniform Building Code Exposure 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.
2. If Model 6851 (3” x 72”) is used for .90m and 1.0m Antenna Dimension “B” on pier foundation must be increased by 4” and concrete
volume will increase accordingly.
3. 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.