Channel Master 243 - Appendix A; Outline Drawing; 2.4 m Offset SMC Antenna Survival Windloads at 125 MPH Velocity

22.6˚ OFFSET
MECHANICAL
AXIS
(NORMAL TO
ANTENNA FACE)
BEAM
AXIS
69.5"
M
O
M
H
= HORIZONTAL FORCE
F
V
= VERTICAL FORCE
M
T
= TORSIONAL MOMENT
M
O
= OVERTURNING MOMENT
F
V
M
T
F
H
2.4m OFFSET SMC ANTENNA SURVIVAL WINDLOADS AT 125 MPH VELOCITY
ELEVATION FORCE MOMENTS
DEGREES (POUNDS) (FOOT-POUNDS)
MECH. BEAM F
H
F
V
M
T
M
O
0 23 3,330 -89 2,612 19,286
10 33 3,152 -666 2,557 18,255
20 43 3,064 -1,288 2,426 17,746
30 53 2,775 -1,843 2,202 16,072
40 63 2,442 -2,220 1,867 14,143
50 73 2,131 -2,442 1,568 12,342
60 83 1,776 -2,553 1,213 10,286
70 93 1,332 -1,976 933 7,715
M
O
BASED ON 69.5” FROM MOUNTING SURFACE TO C OF ANTENNA.
Values shown above represent maximum forces for any wind direction.
Height and exposure factors from the uniform building code are NOT included.
L
L
L
MAXIMUM DISTANCE FROM GROUND TO C OF ANTENNA
6” (NOTE: C IS 6” ABOVE TOP OF GROUND POLE)
GROUND FOR WIND SPEED OF:
PIPE EXPOSURE 125 MPH 120 MPH 115 MPH 110 MPH 100 MPH
6.62 O.D B 96” _ _ _ _
x 6.06 I.D. C 62” 67” 73” 80” _
Schedule 40 D _ _ _ 61” 73”
6.62 O.D. C 89” 96”
x 5.76 I.D. D 67” 80”
Schedule 80
TOP
BOTTOM
()
C
L
L
C
L
C
L
C
96.87
104.87
32.37
24.00
6.62 O.D.
16.75
63.50
3.25
10
6
12.57
92
12
22.6"
121.94
5
6.3
34.75
14.62
1.12
9.0
8.12
15.5
67
22.6"
10"
.75ø
ANT.
116.25
2.5 SQ TUBE
35.62
82.25
12.6" REF.
BOT. OF ANT.
4.0 SQ TUBE
26.50
11.00
13.75
ANT.
MECH AXIS
⁷⁄₈ø
69.5
SEE
CHART
TOP OF POLE
BOT. OF ANT.
BEAM AXIS
NOTES: 1. Antenna and mount certified to withstand
125 mph wind.
2. Chart based on A36 (36,000 psi yield) steel
and 1.5 stability - 1991 Uniform Building Code Table 23G Exposure B, C or D at 0-15’ height above ground.
APPENDIX A
OUTLINE DRAWING
TYPE 243 2.4m OFFSET SMC REFLECTOR W/Tx/Rx MOUNT
ALL DIMENSIONS IN INCHES