Yea - you are right Ken. Seems like every time the ASCE updates the
code....
Matt
KM5VI
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Ken
Sent: Sunday, December 01, 2013 7:17 AM
To: Matt
Cc: reflector -tower
Subject: Re: [TowerTalk] FW: More crank-up questions
It is interesting how base requirements have changed over the years. Back
in 1970, I had a 64' freestanding aluminum tower (Heights) with a tribander
on it and other antennas. All the manufacturer specified for a base was
4'x4'x4' concrete and I don't think they said much, if anything, about
rebar. I had that tower up at two different locations, I'm pretty sure the
bases are still there ;-)
Ken WA8JXM
On Dec 1, 2013, at 1:44 AM, Matt wrote:
> The design
> notes allow for soil conditions of 333 psi wich they defined as "sand
> well graded". Regarding foundation dimensions I guess it depends on which
school
> one subscribes to. Conservative is to size for no tip-over without
taking
> any credit for any contribution of soil bearing strength. If one has
some
> compressive soil numbers, then the foundation size can be reduced to
> take credit for the coil's contribution.
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