Site planning
Chapter 2 Planning considerations
phn-0896_012v000
2-8
Jul 2010
Calculation of lateral force
The PTP 600 Series, 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 . 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 600 ODU (integrated or connectorized
model) at different wind speeds is shown in
Table 2-1
and
Table 2-2
.
Table 2-1 Lateral force – metric
Lateral Force (Kg) at wind speed
(m/s)
Largest
Surface Area
(sq m)
30
40
50
60
70
Integrated
PTP 600
0.130
12 22 34 49 66
Connectorized
PTP 600
0.093
9 16 24 35 48
Table 2-2 Lateral force – US
Lateral Force (lb) at wind speed
(mph)
Largest
Surface Area
(sq ft)
80
100
120
140
150
Integrated
PTP 600
1.36
36.6
57.1
82.3
146.2 228.5
Connectorized
PTP 600
1.00
26.9
42
60.5
107.5 168.0
NOTE
When the connectorized ODU 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.
4Gon www.4Gon.co.uk info@4gon.co.uk Tel: +44 (0)1245 808195 Fax: +44 (0)1245 808299
