Would a hole 8 x 8 x 3 (5.3 yards) be a safe equivalent? I doubt that
anyone on towertalk could answer your question without studying the soil
conditions and the unmentioned tower that goes on it. It is probably less
expensive to find a backhoe that can dig a little deeper or perhaps you
can shore up the hole to safely dig by hand.
John KK9A
To: towertalk reflector <[email protected]>
Subject: [TowerTalk] Base equivalent
From: Mike Reublin NF4L <[email protected]>
Date: Fri, 10 Jan 2014 16:28:11 -0500
List-post: <[email protected]">mailto:[email protected]>
The specs for my crank up call for a hole 4x4x7.5 feet. That works out to 4.4
yds of concrete. The smaller backhoes that I can get to the site can go to a
depth of 6 feet. Because of the water table, I consider it an unacceptable
risk
to put a man in the hole to dig out to 7.5 feet deep.
A hole 5x5x6 is 5.5 yds.
Would that be a safe equivalent to hold the tower up with the same wind load?
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