Treemotion for Rescuing?

[Fairfield]

Moss,
That is the points to keep your eye on def. In my mind the most stressed out of all of them is going to b the ring on the bridge. the rope will hold way more then two people and the hitch when set right will hold and stop more then that weight also. So the one thing that stands out in my mind is the multi directional pulls on the ring.
In my mind I see nothing wrong with making a rescue with the TM. Also as long as you are trained to make rescues a pickoff is one of the fastest and easyest ways for a singal victim rescue and are done all the time ( not just in tree world ).

 

[tockmal]

[ QUOTE ]
I have a question in regard to the original question. I understand that no one favors this type of rescue but if you are doing a pickoff rescue and attaching the victim to your harness (in this case the Treemotion), aren't you really transferring their weight to your rope, the carabiner (and hitch) attaching the rope to your harness and the ring on the Treemotion bridge? Those are the points that I would be looking at strength rating in regard to rescue, not the harness itself.
-moss

[/ QUOTE ]

moss, i made this comment earlier in the thread;

"In some rescue techniques the victim(his rope unusable) is attached to your rope, not your harness, he may be clipped to your harness to keep him close, but his weight is taken by your rope."

 

[Stumper]

Fairfield, Rings are properly suited to multidirectional pulls. MDPs are bad for 'biners because they are designed for axial loading

 

[moss]

[ QUOTE ]
moss, i made this comment earlier in the thread;

"In some rescue techniques the victim(his rope unusable) is attached to your rope, not your harness, he may be clipped to your harness to keep him close, but his weight is taken by your rope."

[/ QUOTE ]

I missed it. In my understanding of pickoff rescue only one point of attachment is needed between rescuer and victim, that attachment would be to an independently strong part of your harness (the ring on the TM bridge for instance) that also allows the transfer of the victim's weight to your rope.

If the victim is being lowered on their rope you could also use the pickoff attachment to your harness as a backup or to keep them close as you mentioned.
-moss

 

[Lazarus2]

Its standard practice in the UK to first clip a locking 'quickdraw' (2 krabs either end of 6" runner) from center D to casualty center. This keeps them close and safe from a fall while prepping further, and frees the rescuers hands.

The rescuer then ties a prusik on the standing end of their doubled system. This is then clipped to the casualty and pushed up the rope to tension, to suspend the casualty off of the rescuers DdRT system. The casualty is therefore protected twice from a mis-clip, and there is slightly less weight on the hitch than if hanging off the harness.

The casualty sits very comfortably in this set up, and the rescuer is free to manouver.

 

[frans]

[ QUOTE ]

The casualty sits very comfortably in this set up, and the rescuer is free to manouver.

[/ QUOTE ]

Taken out of context: "The casualty sits very comfortablly in this set up."

Just seeing some fun in this VERY SERIOUS scenerio. What 'casualty' is sitting 'very comfortable' ????

W/Love,
Frans

 

[tockmal]

[ QUOTE ]
What 'casualty' is sitting 'very comfortably' ????


[/ QUOTE ]

Laz2 also puts a soft cushion behind the casualty's head
with an adjustable lanyard to hold the cushion in place.

But only after it has passed EN 324.45..blah blah blah.

 

[Peter McS]

[ QUOTE ]
[ QUOTE ]
What 'casualty' is sitting 'very comfortably' ????


[/ QUOTE ]

Laz2 also puts a soft cushion behind the casualty's head
with an adjustable lanyard to hold the cushion in place.

But only after it has passed EN 324.45..blah blah blah.

[/ QUOTE ]



lol

 

[Lazarus2]

hahaha! Very funny guys

Of course, I was referring to the comfort of the rescuer not having to have the weight of a second person pulling on his hips!

Besides, everyone is strictly briefed; the pink fluffy cushions ALWAYS stay in the van! (foam filling complies with Statutory Instrument 1988 No. 1324
The Furniture and Furnishings (Fire) (Safety) Regulations 1988.)

 

[Ron]

Still a good point has been raised. If the SWL of a TM harness is 100kg, or 220 lbs, a 220 lb climber with 20 lbs of gear, is over the manufacturer's recommended SWL. If there were an accident due to harness failure for any reason, the manufacturer would claim the harness was used over their recommended SWL. I think they'd be completely off the hook. Especially if one clipped another person into any part of the harness - that could be double the manufacturer's SWL.

Just for comparison, a New Tribe harness is rated for 5000 lbs. Of course that's not SWL, but let's pick a safety factor of 20:1 - that's higher than ANY standard I know of, and apply it to the NT harness. The SWL would be 5000/20 = 250 lbs or 113kG - with a 20:1 safety margin!

Assuming the TM has a 15:1 safety margin, the highest standard I know of, the breaking strength would be about 3300 lbs. If it's 10:1 it's breaking strength would only be about 2250 lbs - a little less than half the strength we expect from our biners.

Also, we don't even know what the weak link is that sets the 100kG recommendation.

But, if one is comfortable with a SWL of 220 lbs, then it's probably a great saddle.

 

[Treespotter]

Maybe the Treemotion is made just for the slim and slender. The rest can use a Weaver, I'm not going to stop anyone buying a Weaver. What I could suggest is this.

Stop eating at the Mac and watch your weight. Then you can fit the TM or TF and have the fun of a comfy climb all the way up into the tree without being scared of the big mass crushing the twigs.

 

[Lazarus2]

Oh, I don't know Wolter, 'Muffin top' look works for TFX.

 

[Fairfield]

Stumper,
I know a Ring is made for MDP, I was just saying that it is going to to take the most stress per pound. Biners are not good on MDP going on its spine and gate but other wise loading it on top and bottom is what it is made for.