On Sun, 25 Jan 2004 11:33:38 -0500, "Ralph Mowery"
wrote:

As you have shown there are many ways to pour the material . I am sure the
tower maker has their recommendations. I doubt it would do much good to
have it only 1.5 feet deep and 10 feet wide. I would think it would be
poured in more of a cubic form but deeper than it is wide. Also there is
all the rebar to install correctly and if it is like some Rohn tower there
is a specification of some rocks and sand at the bottom of the hole.
Towers are not somthing youjust stick up and hope for the best.

Agreed, it is not something to make up as you go along. You should
have something designed by a civil engineer, including off-the-shelf
designs.

This would simplify getting a building permit, especially if your town
engineer is unfamiliar with antenna towers. Might make your next-door
neighbor happier, too.

This includes how the bedding under the foundation is handled.
Adjustment for frostline in your area is needed as well.

A non-guyed tower is especially dependent on the strength of its
foundation, and if you do the math of the windload leveraged from the
top of the tower, some rather impressive forces are generated.

The rebar needs to be tied together both physically and electrically,
and thought needs to be given to grounding, both for lightning/short
circuits and for a radio counterpoise.

Happy trails,
Gary (net.yogi.bear)
------------------------------------------------
at the 51st percentile of ursine intelligence

Gary D. Schwartz, Needham, MA, USA
Please reply to: garyDOTschwartzATpoboxDOTcom