[TowerTalk] {SPAM} Re: hazer comments

[bill rubin]

Rodger,  When you said "So going to EHS over Phyllistran would more than
double the pull on the tower raising cables."  Thats not really apples to
apples.
Yes I agree 5/16 EHS #6650  has higher tensel strength than HPTG40001
Phyllistran #4000 is rated at #4000.

However, it is better to match to combine 1/4 EHS #4400  with HPTG40001
Phyllistran #4000 thereby the adjustment tension can be eaiser since they
are close to matching.
For 5/16 EHS  #6650  would better match HPTG67001 Phyllistran #6700

73 Bill N1HWC

On Thu, Jul 31, 2008 at 5:10 PM, Roger (K8RI) <K8RI-on-TowerTalk at tm.net>wrote:

> bill rubin wrote:
>
>> sorry not 10% (#440) !!     example 1/4 at 60F is #670 tension
>>
>
> It is on mine. <:-))  1/4" Phyllistran is 4400# test, 5/16 is 6600# or was
> when I installed mine. It's changed a little since then.
> I think I mentioned in the original post that going to steel would increase
> the load substantially.
>
> It depends on the particular cable.   Wire rope varies tremendously in
> strength over a range from less than 4000# to well over 10,000#
> EHS I don't use except for the bottom guy ends. It's just too stiff and
> heavy which makes it difficult to handle for a guy my age and size.
> I have close to 100' of 5/16 out in the shop that I'll never use. Full coil
> minus what I used for the guy ends.
> But regardless of what size or type the figures were to illustrate how much
> extra load those guys put on a crank up tower.
>
> At 980# tension for  1/4" EHS that is 2546# just for the top guys at a 30
> degree angle and 2078 for the set at 45 degrees or a total of 4625# or a bit
> over 2 1/4 tons in addition to the tower weight.  This is neglecting wind
> loads, twisting moments, and up here ...Ice.  So going to EHS over
> Phyllistran would more than double the pull on the tower raising cables.
>
>
> 73
>
> Roger (K8RI - ARRL Life Member)
> www.rogerhalstead.com
> N833R (World's oldest Debonair)
>
>