I looked at the Hubbell link Shawn provided on the earth anchors, and
noticed this:
Note: If hand installed, holding capacity may be reduced by as much as 10%
to 20%. Capacity ratings apply to properly installed anchors only. Failure
to install within 5° of alignment with the guy load will significantly lower
strength.
I always knew the type of soil would affect holding capacity, but now I see
that with hand-installed anchors, and with anchors used to hold 2 or 3 guys
(where I am definitely exceeding the 5 degree load alignment spec)...I may
be way down from what I am estimating holding capacity to be.
So ignoring the lower capacity due to sandy soil here in Florida, I may be
losing 20% of capacity due to hand installing, and losing some unspecified
capacity (Hubbbell says "significantly reduced") because some of my guys are
pulling outside the 5 degree alignment. I'm starting to wonder how much if
any margin I have. Guess a more formal analysis may be warranted.
--Ed, N3CW--
Message: 2
Date: Tue, 17 Mar 2015 15:57:24 +0000 (UTC)
From: N3AE <n3ae@comcast.net>
To: TowerTalk <towertalk@contesting.com>
Subject: Re: [TowerTalk] Earth Anchors
Message-ID:
<1802192855.8625804.1426607844350.JavaMail.zimbra@comcast.net>
Content-Type: text/plain; charset=utf-8
The product you're looking for is likely on this page:
http://www.hubbellpowersystems.com/anchoring/no-wrench/
Perhaps a call to Hubbell's customer support line would get you info on a
local distributor.
OBTW...I put in three PS816's last year, by hand. What a job! Time of the
year, at least around here in Maryland, makes all the difference. Very moist
ground after the winter thaw is the best, i.e. NOW. In the summer with dry,
hard earth, forget it.
Good luck
Shawn
N3AE
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