The product itself
consists only of a supporting platform, while the antenna
supporting structure (ie pole or lattice tower, according
to the project requirements) is a traditional unit. The
platform supporting shelter and antenna system has been
conceived and realized to allow a quick and easy station
installation.
Having a variable geometric configuration makes it suitable
to fit to a wide variety of basements, leaning, when necessary,
only on the main structures, without being compelled to
manufacture specifically tailored platforms.
A load-sharing device being provided, allows the distribution
of the platform load in the most convenient way, thus
avoiding anomalous load concentration, which could damage
the support. Particularly, if the support should subside
in the rate of a few millimetres, corresponding to any
of the feet, -that would not cause any damage to the support
itself- that would normally imply:
The subsiding support would result unloaded, as well as
the opposite supports, even if partially.
The main load shares on the other supports, almost doubles,
causing serious risks of crushing for the remaining supports
(at least in the contact area with the feet).
Using the load-sharing device, on the contrary, makes
the foot follow the small support subsiding, with no consequence
on the load weighing on the other supports.
A variable geometric configuration makes it possible to
installing in the shortest time, employing ex-stock materials,
while the load sharing device allows to ballast the platform
itself, even with huge loads. In this way you can avoid
any structure upsetting, without fastening it to the building.
As direct consequence of this, you can install platform
and all the supporting material as if it was a temporary
system, thus with no need of previous legal authorization.
As the system is stable, in any case, once obtained the
necessary authorizations, you can consider it ultimate.
Let ‘s answer to your questions:
1 - There is no limit to the number of installations,
but the physically available room and the possibility,
already increased by the load-sharing device, to ballast
accordingly.
2 - The wind pressure, to which the platform can resist,
depends on having a large enough support and on the possibility
to ballast the platform adequately, being anyway eased
by the load-sharing device. As an example, with a support
foot of 2.5 mt, with an average load of (platform + equipment
+ ballast) 3 tons, you can resist to a wind pressure provoked
to a 10 mt high tower with 4 GSM antennas+ 1 MW antenna
(this data has been provided by FIT, but I cannot tell
which is the wind speedness.
3 - Deflection and rotation of the antenna don’t
depend on the platform, which has to be considered perfectly
stable, but on the antenna supporting structure mounted
on it.
4 - Since the platform shall be ballasted, there is not
weight limitation for the items installed on it. For what
concerning the shelter dimensions, there is no problem
to install even one having a plant area up to 10m2.
5 - The example of point 2 shows that the building can
withstand a load of 3tons. That means that such a load
can be s easily supported by a normal stair case structure.
It is clear that in case of very strong building structure,
the installation has no predetermined limits for what
concerning the number of antenna and the antenna supporting
structure type and height.
6- The most evident advantage of the load-sharing device
consists of doubling the load to be supported at parity
of safety (with the same safety margin).
7 - Being the platform ballasted, the legs are never tension
stressed, hence the building structure are only compression
stressed.
8 - The photos available clearly show the solidity of
the platform and also illustrate that the weight of 3tons
is equally distributed on the 16 supporting points. Consequently
the load on each support is about 190Kg.
9 - Since the wind effect is such to produce a tilting
moment, the load can be increased up to 300-320Kg with
reference to the leeward supports and consequently degrease
till 35-40Kg on the upwind ones.
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DISTRIBUTED LOAD PLATFORM
