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[TowerTalk] insulators & shackles

To: <towertalk@contesting.com>
Subject: [TowerTalk] insulators & shackles
From: k4ro@music-city.tdec.state.tn.us (K4RO Kirk Pickering)
Date: Tue, 21 Oct 1997 00:16:44 -0500
Two more novice questions:

The "502" insulators which can be used with the grips for 1/4" EHS
are designed for compression loads and not tensile loads, correct?
Or will they work wither way?   With it positioned for a compression
load, if it failed, the grips would "catch" (and then surely they 
would fail.)  Positioned for a tensile load, if the insulator failed,
there would be no "backup" of the grips catching.  Is only one way
correct?

Second quesion is on the proper use of shackles.  The load is supposed
to rest with one side on the ring and the other side of the tensile load
on the pin itself, correct?  If the shackle is positioned otherwise, one 
load is on the ring, and the other load rests on the sides of the shackle, 
with a spreading force on the arms holding the pin.  I assume the load 
should be on the pin itself, correct?

When this project is done, I'll post my "what I learned in this tower
project" report.  Thanks again!  

-Kirk  K4RO

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