Wall clamps ... it all depends on how high your house is at the peak ...

"Jason Wagner" wrote in message
...
I would like some opinions from you experiencd folks as to an idea I have
for putting up an antenna mast.

My fathers own an electrical supply warehouse so I have access to steel
conduit at cost. Many years ago we used 4" conduit and elbows to build a
basketball backboard pole in my folks' back yard, and the thing has stood
the test of time, weather, and a generation of kids hanging from it.

I have a similar idea for an antenna mount.

I would like to dig a hole on the side of my house, approximetely 24" deep
and 12" square. I'd like to take 12 2" conduit couples and weld them into
a
sheath, and then put this sheath in the hole, filling it (the hole) with
cement. So I'd have a big cement block in the ground with a hollow tube
in
the middle. I would then take three 10' lengths of 2" conduit and weld
them
together using couples, and place the resulting pole into the hollow
sheath
in the cement. I would then use a pipe fastener strap to fasten the pole
to
the awning of the house, approximately 9' up from the ground. I'd pound a
couple of copper lightning rods into the ground several meters away, and
ground the pole to these rods with large-guage copper wire.

So I'd have a grounded 28' pole above ground, anchored in a 24" deep steel
sheath in the ground, and anchored at 9' to the side of the house with
steel
and bolts. So I'd have 21' of 2" steel conduit sitting in the air
unsupported.

I would then build some antenna mounts out of 1" conduit (something that
would look like those little plastic tables that the use to keep the
cardboard off of pizzas in their delivery boxes). I would of course then
affix antennas to these mounts.

Does this idea have any merit? Is 2" steel conduit rigid enough to
support
weight at 28' above ground? Should I go to 3" pipe instead? The more I
sit
here and think about it, the more I think 2" just won't be thick enough to
stay rigid in high wind.

I live in southeastern Arizona, and the winds here to get a little high.
But my major concern would be lightning. Also, at some point we will be
moving, and I'd like to just be able to take the pole, remove it from its
sheath, and simply have to dig and pour at the new house.

Thanks for any comments or suggestions.