Preform comes from the name of a major grip manufacturer, not from "tower
apes".
http://www.preformed.com/
** Which has never been denied by anyone in this discussion. OTOH linemen
and other strand installers use it as a general description thus my tower
ape terminology.
Dead end is the termination style of grip.
http://www.preformed.com/index.php?option=com_phocadownload&view=category&id=15&Itemid=145
** Also previously discussed
The normal "Guy Grip dead end" is typically used on any shorter length guy
line that does not have rotational or twisting forces, and they are
normally are rated at 100% of stand breaking strength (but you should
check the catalog specs because some are less).
** As are the Big Grips rated at strand strength.
The "Big Grip dead end" is the Prefomed Line Products name for the longer
grips, and are better for longer guy runs that might twist.
PLP manufactures custom grips that are not cataloged. PLP would probably
be a better place for application advice than Ham tower parts vendors (who
sell some pretty sketchy stuff at times) or Ham reflectors. :)
** PLP marketing is aimed at commercial and industrial applications and not
hobbiests. Their idea of a radio tower starts where most ham versions let
off.
Every tower failure I have seen has come from incorrectly installed guy
strand, saddle clamps, or anchors. I've seen towers where people splice
guy lines with dead ends looped through dead ends!
** Ive even seen some with RatShak guy wire which is maybe 1/8. Ive never
used an inline splice either.
It's common to see someone
worry enough to buy extra long grips (which doesn't do much for strength),
> and then not worry about radius inside the loop (which just kills the
strength).
** Good points
Carl
KM1H
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