If I'm following this correctly, we call that steel reinforced concrete
in the US.
Some high end buildings use ICF made out of Neopor 2300, which is the
best (or worst) of both worlds. The 2300 variant is infused with
graphite, so it makes a Faraday shield, albeit not very low resistance,
and then there is rebar in the design as well. [Best for strength and
insulation; terrible for RF penetration.]
On 4/8/2013 10:25 PM, David J Taylor wrote:
Hi David yes its ferro-concrete which makes quite a good screen (a lot
worse
than domestic brick) but the windows are not coated I think. (BT Labs at
Martlesham)
[]
The windows are SW I think but give a good view of a quadrant of the
sky. It
will be interesting to see how long it takes to lock up compared with an
outside antenna.
Thanks and Best Wishes
Alan
G3NYK
=================================
Alan, I can imagine that a commercial building may provide more
attenuation - never been to Martlesham Labs myself but have been in
similar buildings. One small point - will you need to tell the unit
that it has moved, or will it recognise that for itself?
Good luck with your meeting!
73,
David GM8ARV
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