[TowerTalk] Guy Cable

[Eric Scace K3NA]

   Do not use 19 strand wire rope.  It is designed for a different 
application (runs around pulleys, etc), and comes in many different 
designs (Warrington vs Seale cross-sections, right regular, right lang, 
etc.).  All of them have particular advantages and disadvantages for 
specific applications.  For OUR application (tower guy wire), 19-strand 
wire rope is too stretchy.

   Seven strand wire rope contains one straight WSC (wire strand core) 
and six surrounding strands, and all strands are the SAME diameter.  
THIS is what you want for tower guys.  It has much lower stretch than 
other wire rope designs (except solid rod).

   You want right lay (when viewed from above, the strands rotate to the 
right as they recede away from the observer), the most common form.  If 
you use Grips, you must use the correct version of Grips for the lay of 
the guy.

   Doesn't McMaster have galvanized EHS seven strand cable or cable clips?

-- Eric

on 07 Mar 13 Tue 17:37 Larry Comden said the following:
> TT'ers:
>
> I'm going to replace the guy wires on my Rohn 25 tower this spring as part of a general overhaul. Present cable is 3/16  1X7 wire rope (probably EHS but after 30 years who remembers?). No insulators were used in the original installation. That'll be corrected.
>
> Texas Towers sells 3/16 wire rope for $39/100' (probably 1X7 with 3990 lbs breaking strength). McMaster-Carr sells 3/18 1X19 (4700 lbs) for $38/100.
> Both sources are galvanized. Price obviously isn't the deciding factor.
>
> Question: Is the 19 strand stuff easier/harder to work with? Any problems with weathering, etc? Is there a "mismatch" when using the 1X19 with the preformed Big Grips?
>
> Question: McMaster also has Stainless saddle clamps cheaper than the galv ones from Texas Towers. Any problem with the stainless ones?
>
> TIA and 73
>
> Larry K3VX
>
>
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