use of climbing harnesses for guest cavers

Discuss vertical caving, equipment, & techniques. Also visit the NSS Vertical Section.

Moderator: Tim White

Re: use of climbing harnesses for guest cavers

Postby Bob Thrun » Oct 25, 2011 12:04 am

paul wrote:As a matter of interest, the current issue of the British caving magazine, Descent has an article about SRT efficiency with respect to body shape. I'm not sure how easy it is to obtain the magazine in the US though.

The same article is available in Nylon Highway 53, along with two follow-up articles. Entire issue ... asting.pdf ... gPart2.pdf ... rtMtoF.pdf

Going back to the original question: Any sit-stand climbing system has some inefficiency. As an example, I once watched a girl climbing in a contest with a sit-stand system. I watched where her head was in relation to her knots. She stood up 18 inches and then sat down 9 inches on each step. She raised her center of gravity, in total, twice the distance of the climb. The distance you lose each time you sit down depends where on your thighs the leg loops are. Climbing harnesses all seem to have the loops low,making them particularly inefficient. I can't say for sure because I have never used a climbing harness. A tight butt strap minimizes the distance lost when you sit down. Most caving harnesses look to be in between.
Bob Thrun
NSS Hall Of Fame Poster
Posts: 322
Joined: Jul 18, 2006 12:50 pm

Re: use of climbing harnesses for guest cavers

Postby Caver John » Oct 25, 2011 11:21 am

Having your harness good And tight aswell as the chest harness nice and tight definTly helps reduce any loss when sitting.
Any slop will result in inefficiency.
Caver John
NSS Hall Of Fame Poster
Posts: 216
Joined: Jun 16, 2011 1:02 pm
Primary Grotto Affiliation: Scag grotto

Re: use of climbing harnesses for guest cavers

Postby pub » Oct 25, 2011 6:31 pm

Caver John wrote:…when clipped through both attachment points and weighted, the waist a.p and the leg loop a.p. are pulled together so there virtually pulling on the samespot on the biner, hence no crossroad. But this is a very valid point and I have concidered switching to deltas
I agree, both the waist and leg loops come together in one point of the attachment.

Ralph E. Powers wrote:I use a Black Diamond Alpine Bod harness with my frog... the triangle mallion is part of the main tie in to the harness and the croll is attached directly to the mallion and thus the "tie-in" is low enough not to be a problem.
I too started with the BD Alpine Bod (no source of caving harness here) but found the triangle mallion being crowded so I attached the croll, cowstail, and rack independently with their own quicklink (be sure to use a carabiner with a Petzl Stop). All attachments capture the waist and leg loops. FWIW, the quicklink lowers the croll a little bit more.

This too was before I got a real caving harness but I go back to it when I let beginners use my rig.
Balincaguin comes from the Zambal phrase, "Bali lan caguing" meaning "house of bats."
This was the former name of the Municipality of Mabini, Pangasinan, when it was part of the Province of Zambales (of Mt. Pinatubo Volcano fame).
User avatar
NSS Hall Of Fame Poster
Posts: 296
Joined: Jun 5, 2009 10:31 pm
Location: Mabini, Pangasinan, Philippines
Name: jerry rendon
NSS #: 61437
Primary Grotto Affiliation: Balincaguin Conservancy Grotto [Primary] + SoCal Grotto


Return to On Rope!

Who is online

Users browsing this forum: No registered users