
4 Planning Considerations
35
Force (in pounds) = 0.0042 . A . v
2
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 PTP 300 Series bridge (integrated or connectorized
model) at different wind speeds is shown in Table 5 and Table 6.
Table 5 - Lateral Force – Imperial
Lateral Force (Pound) at wind speed (mph)
Largest Surface
Area (sq ft)
80
100
120
140
150
PTP 300 Series
Bridge - Integrated
1.36
36.6
57.1
82.3
146.2
228.5
PTP 300 Series
Connectorized
1.00
26.9
42
60.5
107.5
168.0
Table 6 - Lateral Force – Metric
NOTE
When the connectorized version of PTP 300 Series bridge is used with external
antennas, the figures from the antenna manufacturer for lateral force should be
included to calculate to total loading on the mounting structure.
4.7.2 Capabilities of the PTP 300 Series Bridges
The structure and mounting brackets of the PTP Series systems are capable of withstanding
wind speeds up to 151mph (242 kph). The installer should ensure that the structure to which
the PTP 300 Series Bridge is fixed to is also capable of withstanding the prevalent wind
speeds and loads.
Lateral Force (kg) at wind speed (m/s)
Largest Surface
Area (sq m)
30
40
50
60
70
PTP 300 Series
Bridge - Integrated
0.130 12
22
34
49
66
PTP 300 Series-
Connectorized
0.093 9
16
24
35
48
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