Wind Loading
143
12 Wind Loading
12.1
General
Antennas and electronic equipment mounted on towers or pole mounted on buildings will subject
the mounting structure to significant lateral forces when there is appreciable wind. Antennas are
normally specified by the amount of force (in pounds) for specific wind strengths.
The magnitude of the force depends on both the wind strength and size of the antenna.
12.2
Calculation of Lateral Force
The 500 Series bridge with or without the integral antenna is essentially a flat structure and so
the magnitude of the lateral force can be estimated from:
Force (in pounds) = 0.0042 . A . v2
Where A is the surface area in square feet and v is the wind speed in miles per hour.
The lateral force produced by a single 500 Series bridge (integrated or connectorized model) at
different wind speeds is shown in
and
Largest Surface Area (sq
ft)
Lateral Force (Pound)
at wind speed (mph)
80
100
120
160
200
PTP 500 Series Bridge -
Integrated
1.36
27
41
57
101
164
PTP 500 Series Bridge -
Connectorized
1.00
27
42
60
98
N/A
Table 18
Lateral Force – Imperial
Largest Surface Area (sq m)
Lateral Force (Kg)
at wind speed
(m/s)
30
40
50
60
70
PTP 500 Series Bridge - Integrated
0.130
12
22
34
49
66
PTP 500 Series Bridge -
Connectorized
0.093
9
16
24
35
48
Table 19
Lateral Force – Metric
Содержание MOTOWI 4
Страница 1: ...PTP 500 Series User Guide phn 1115 000v001 ...
Страница 74: ...Web Page Reference 74 Figure 37 Save Configuration File Screen ...
Страница 100: ...Web Page Reference 100 Figure 59 Spectrum Management as seen from the Master ...
Страница 108: ...Web Page Reference 108 Figure 66 Spectrum Management Master Screen With Operational Restrictions ...
Страница 112: ...Web Page Reference 112 Figure 68 Remote Management ...
Страница 165: ...Data Rate Calculations 165 Figure 112 QPSK 0 50 Single Payload Figure 113 QPSK 0 75 Single Payload ...
Страница 166: ...Data Rate Calculations 166 Figure 114 16 QAM 0 50 Single Payload Figure 115 16 QAM 0 75 Single Payload ...
Страница 167: ...Data Rate Calculations 167 Figure 116 64 QAM 0 67 Single Payload Figure 117 64 QAM 0 83 Single Payload ...
Страница 168: ...Data Rate Calculations 168 Figure 118 256 QAM 0 75 Single Payload Figure 119 QPSK 0 50 Dual Payload ...
Страница 169: ...Data Rate Calculations 169 Figure 120 QPSK 0 75 Dual Payload Figure 121 16 QAM 0 50 Dual Payload ...
Страница 170: ...Data Rate Calculations 170 Figure 122 16 QAM 0 75 Dual Payload Figure 123 64 QAM 0 67 Dual Payload ...
Страница 171: ...Data Rate Calculations 171 Figure 124 64 QAM 0 83 Dual Payload Figure 125 256 QAM 0 75 Dual Payload ...
Страница 197: ...Glossary 197 UTP Unshielded Twisted Pair VLAN Virtual Local Area Network ...
