Operation Manual

Nokia MetroSite GSM Base Station, Requirements for Installation and Operation
22 (38) © Nokia Networks Oy Internal Copy DN9913471
Issue 1 en DRAFT 2 Draft
3.4 Requirements for wall and pole installation
Qualified personnel must inspect the installation wall and/or pole before
mounting the BTS. Ensure that the installation wall or pole is strong enough to
bear the weight of the BTS (max. 40 kg / 88.4 lb) in any condition.
The optional pole mounting kit can be used when the installation pole diameter is
between 60 and 300 mm (2.36 and 11.81 in).
Anchor screws
The anchor screws are used for attaching the Nokia MetroSite GSM BTS to the
wall. These screws are not included in the delivery.
The anchor screws must be M6 size, stainless steel with the minimum breaking
strength (R
m
) of 800 N/mm
2
. An appropriate counterpart for the anchor screw
(for example, an anchor plug) must be selected according to the screw and the
mounting base material. If the anchor screws are of other standard than the metric
standard, they must be selected so that they meet the requirement set to the metric
standard screws mentioned above.
Wind load
For pole mounting a pole must be selected which does not break off even in
stormy winds. Table 4 shows the load imposed on the pole (with a BTS attached
to it) in two wind velocities.
3.5 Grounding
To protect the Nokia MetroSite GSM BTS from damaging overvoltages through
antenna equipment, communication cables, or power supply lines, grounding
cabling must be planned and installed before the installation of the base station.
To avoid interference, it is recommended that large grounding systems be
designed case-specifically.
Table 4. Wind load
Wind velocity
Load imposed on
the pole
40 m/s
89 mph
410 N
50 m/s
112 mph
640 N