[TowerTalk] Phillystran sizing and use
Sat, 9 Sep 2000 10:23:16 EDT
In a message dated 09/08/2000 3:11:38 PM Pacific Daylight Time,
> I put up a 50' tower and used 3/16" (Next size up from 1/4" - the first size
> that uses guy grips). I think if you look, the ultimate strength (breaking
> strenght) on the Phillystran is higher than the EHS for the same diameter.
> think the spec that Phillystran publishes is "working strenght" which is
> safe strenght for an application. The working strenght is a derating from
> the breaking strenght.
Actually Phillystran uses EHS as their equivalent. The terms in effect
are 'ultimate breaking strength' and 'tension', not 'working load' (that's
for haul ropes).
Size UBS Final working tension (10% of UBS)
3/16" EHS 4000# 400#
HPTG4000 4000# 400#
1/4"# EHS 6700# 670#
HPTG6700 6700# 670#
Cheers, Steve K7LXC
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