[TowerTalk] FW: FW: More crank-up questions

[Matt]

Yea - you are right Ken.   Seems like every time the ASCE updates the
code....

Matt
KM5VI


-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at 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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