[TowerTalk] Climbing

[Jim Thomson]

From: David Robbins 
Sent: Monday, September 20, 2010 6:26 AM
To: jim.thom at telus.net 
Cc: towertalk at contesting.com 
Subject: Re: [TowerTalk] Climbing


that would of course require either an installed line, which i would not trust due to weather and wear issues... or someone to climb up to attach it before it was used each time, kind of defeats the purpose.

##  I can't see any wear issue on a 3/8" galvanized winch cable, esp with a 15,750 lb breaking strength rating....and zero weight load on it 99% of the time.   You would have the same WX and wear issues
on the permanently installed  3/8"  safety cable....and how often do they ever get changed out ? 

## here's another thought....for commercial applications.  The CSA  rules up here state  that only ONE individual can be  hooked to the safety cable at any one time.  If that's the case, and say the fellow
passes out/ heart attack, etc.... then how is anybody supposed to go up there to help him...using the same safety cable ?   Even  in an emergency case like this, the 2nd climber hooked onto the
same safety cable, the 1st climber could have tools falling onto the 2nd climber.  What's really required is a SECOND  safety cable, on a different face / leg of the tower.   Then if there was any maintenance
issues with the top termination/cable, etc of either  safety cable,  you would always have  a redundant safety cable.   The cost of a 2nd safety cable would be peanuts compared to the cost of the tower.
The average cost of a typ cell site here in town is $500K.   $501K is not abt to break the budget.  

Jim  VE7RF 


Sep 20, 2010 07:24:28 AM, jim.thom at telus.net wrote:

  Date: Sun, 19 Sep 2010 15:57:49 -0400
  From: "Wilson Lamb" 
  Subject: [TowerTalk] Climbing

  The video has certainly generated a lot of talk, some valuable.

  Does anyone use a belay? A competent groundie could keep a line snug as you 
  go up and down, saving you the trouble of all that hooking. Once at a 
  worksite, you could hook on and relieve the groundie for other tasks.
  Wlson
  W4BOH 


  ## I had the same thought a week ago. Some kind of power winch would be cool,
  then just lift the climber up the side of the tower. He could still be hooked onto the
  separate safety cable too, so if the winch cable broke, jammed, etc, the climber is
  still restrained at all times. 0-300' in 60 secs. 

  later.. Jim VE7RF
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