Gentlemen
As per my previous response on this subject...fall arrest cables are specified
to be installed at anchors rated at 5000 lbs force....
The rocket scientists/government regs, CSA, OSHA etc up here demand an 8.75
kilo newton anchor per climber...
My math works it out that 2 climbers can safely be on one cable...with ease...
Anyway...the way I see it...I have met alot of HAMS that all own climbing belts
of various descriptions...however when I call on them to come up their tower to
give me a hand...they all decline....maybe its a status symbol to own a belt
?????
As far as the USA and Canada are concerned... the Federal/State/Province regs,
in reality, are pretty well the same... of course none of these apply to us
HAM's and most times on the local jobs I do for the fellows I m glad they
don't...
Doug
VE6PR
>------- Original Message Follows -------
>From: "Jim Thomson" <jim.thom@telus.net>
>To: <k1ttt@arrl.net>
>Cc:
>Subject: Re: [TowerTalk] Climbing
>Date: Mon, 20 Sep 2010 06:52:02 -0700
>
>
>
>
>From: David Robbins
>Sent: Monday, September 20, 2010 6:26 AM
>To: jim.thom@telus.net
>Cc: towertalk@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@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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