[TowerTalk] Wire size for 800 meter long wire

[Jim Lux]

At 04:30 PM 10/10/2005, Lee Buller wrote:

>To get the force you need to bring the wire tight, you
>would need a serious "come-along" device...and you
>might need to have a block and tackle device as well.
>400 pounds is a lot, but you can do it given enough
>time, energy and wire that does not break.  How about
>steel cable.  Heavy, but it looks like you have the
>place for steel cable....like aircraft or 1/4" type of
>cable.

It's a basic materials problem... steel just won't be strong enough for the 
span and sag (or else, copperweld would work), no matter what size you use. 
You need something that is stronger than steel in terms of its weight, e.g. 
synthetics, glass fiber, spider web, etc.

Also, get too small, and wind loads and aeolian vibrations are going to 
raise havoc.