[TowerTalk] Permanent fall arrest line?

[Bill Turner]

I'd like to install a permanent fall arrest line from top to bottom 
of my tower that I could clip onto using a "rope grab" type of 
device. I think the rock climbers call them "ascenders".

My question is what type of line or rope would be suitable for 
permanent attachment? Most rope will deteriorate in sunlight and I 
don't want something I can't trust. Perhaps a wire line, although the 
rope grabbers I've seen so far are only for rope, not wire. How about 
Phillystran?

Any advice appreciated.

Bill, W6WRT