[TowerTalk] Tower base advise

[AA6DX - Mark]

Greg et al ..
Sounds way over done, to me .. we spend a lot of time on TT about concrete 
and towers, my question to the group is who has some REAL stories about 
tower failure due to concrete base errors?  I don't personally know of any, 
but they must exist, or there would not be all this discussion on the 
subject.   73
Mark Nelson  -  AA6DX

mailto: AA6DX at ARRL.NET

----- Original Message ----- 
From: "AB7R" <ab7r at cablespeed.com>
To: <towertalk at contesting.com>
Sent: Saturday, October 07, 2006 4:10 PM
Subject: [TowerTalk] Tower base advise


Not sure if I over did this or not.  My neighbor brought his backhoe over
this afternoon to dig the foundation for my HG-70HD tower and raising
fixture.

The specs only call for a 4x4x8 hole.  While we did not quite hit 8ft (a bit
over 7 in the middle), the dimensions came to 6.5 x 6.5.  Thats 270 cubic ft
vice 128.  Is the slightly shallower depth going to make a big difference?
I attached a couple pics.

I hope to schedule the concrete pour for this week.  4000 psi and gonna have
it poured pretty wet.  Do I need to get one of those vibrating things or is
pouring it wet sufficient?


Thanks
Greg