chuck wrote in
:

ml wrote:
hi


a friend of mine might get permission to put up an antenna or two on
top of his apt building about 30 stories up mostly flat roof

the other buildings for a good distance are less than 6 stories

so i was wondering how do you protect something like that from
lightning

even if he disconnects the rig from the antenna you've still got
well over 100ft of coax with a lot of charge


there are no other antennas up there just a red flashing light
ontop of the elevator room

what is typically done?

running a heavy cable to ground downside the buidling is out

i guess it wouldn't be 'code' to grab a electrical ground out of
the elevator room, and i guess equally bad to tie into the steal
girders in there

so how do the pro's do it

The building has no lightning protection in place now?

Even if it does, this antenna is likely to protrude above its zone.



--
Dave Oldridge+
ICQ 1800667