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14
Figure 14 Installing a directional antenna on a parapet (2)
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If there is no parapet on the rooftop, fix the pole to the rooftop surface or a cement pier on
the rooftop with expansion screws and stabilize the pole with steel wires. Then, install the
directional antenna on the pole, as shown in
Figure 15 Installing a directional antenna on a parapet (3)
3.
Connect the pole to a grounding grid with a flat steel bar (40 x 4 mm or 1.57 x 0.16 in).
4.
Fix the antenna on the pole with the pole mounting bracket.
Cement pier
Steel wire
Pole
Directional
outdoor antenna
Lightning rod
Pole mounting
bracket
Flat steel bar
To the grounding grid
Steel wire