Treemotion for Rescuing?

[ QUOTE ]
... and EN 813.

Hope that resolves this issue.

[/ QUOTE ]

I don't know where you pulled that explanation of EN813 up from Mark, because it doesn't state what TYPE of fall???

The tests we have undertaken for EN813 were 2m falls on a 1m lanyard (i.e. severe Factor 2 Falls), not the less severe factor 1 fall, which that expalnation could easily imply???
 
[ QUOTE ]
[ QUOTE ]


In the event of an accident.....

In a court of law, a lawyer might ask why you were using a harness (regardless of the rescue technique used) which is rated at 100kg SWL for a rescue when you know that you may be applying more than 100kgs on the harness during a rescue.

Also a lawyer may ask why you supplied a harness which is rated at 100kgs SWL to a climber at all, as you are aware that there is going to be more than 100kgs of weight applied to the harness on a daily basis.

As an employer I need peace of mind.

[/ QUOTE ]

If the harness is used in a manner consistant with the manufacturers instructions, and the harness has passed industry standards, and is certified as having passed those industry standards, then the 'lawyer' will not ask you that question.
If anything the lawyer will be talking to the manufacturer, not you.

As stated by Mark, you concern/question is a non-issue.

Of course you can always attempt to ferret out issues to worry about if that is your mindset.

I am now running off to warn my friends and family that the sky is about to fall!
 
Mark,
Would it be possible to show the data on where it actually broke at? This might be beneficial to some of us across the pond to make our case to our employers about the safety of this such harness as some have doubts on the strength. I have one and love it but am unable to do so at work due to their safety issues.
 
If I was rescueing you would you ask if my harness is strong enough?....doubt it, you would resort to "Klingon" mode. The only reported harness failure I know of was Todd Skinners belay loop failure. A very worn out harness.
 
[ QUOTE ]
Tockmal,

obviously since the tM is certified it has passed the requirements stated by the EN 358 and 813 requirements.

I think I understand what you're trying to say, but it's really a non-issue.

Attached the EN 358 test config... mind this is a extremley simplified and abridged version of the test. Still gives you and idea.

[/ QUOTE ]

Thanks for the information Mark. I know about these tests. Like I said, I've no doubt that the harness is fit for purpose and is a very well designed and thought out harness.

I've looked on other treeclimbing harnesses and there is no SWL, just curious as to why the manufacturer decided to include the SWL as well as the relevant EN numbers?

Is the treemotion the first treeclimbing harness in the history of arboriculture to include a Safe Working Load on the safety label?
 
It's not strictly speaking a SWL... I was groping around for an apropriate term, when I brought that into play. What it refers to is - at the risk of repeating myself - the mass of the dummy used for the EN testing as described in the two prior attachments.
 
[ QUOTE ]
It's not strictly speaking a SWL... I was groping around for an apropriate term, when I brought that into play. What it refers to is - at the risk of repeating myself - the mass of the dummy used for the EN testing as described in the two prior attachments.

[/ QUOTE ]

Ok ok!! I'll let it go.

Thanks for helping me understand.
 
[ QUOTE ]

As stated by Mark, you concern/question is a non-issue.

Of course you can always attempt to ferret out issues to worry about if that is your mindset.

I am now running off to warn my friends and family that the sky is about to fall!

[/ QUOTE ]

Whaaaat!!! getting a little bit excited there buddy!

Sounds like you need to switch to de-caf!!
 
[ QUOTE ]
The only reported harness failure I know of was Todd Skinners belay loop failure. A very worn out harness.

[/ QUOTE ]

Obscure statement, of little or no revelance to the discussion.
 
Mark but the hardware on the saddle what is the tensile strength at which they broke? That's what I was wondering about was the data from the hardware manufactuer that did the testing.
 
Interesting. In those tables there appears little difference between 358 and 813.

As I understand it, 358 drop test is a factor 1 fall on 1 metre lanyard (1m fall) to each hip D meant for work restraint with foot support, not seated suspension.

813 is a factor 2 fall on a 1m lanyard to the midriff seated suspension points (2m fall).

I think 361 is a Factor 2 fall on a 2m lanyard to the sternal or dorsal suspension points (4m fall) used in fall arrest.
 
As I said before, they're an extreme simplification of a very complex procedure, as I'm sure you know only too well...
tongue.gif


But it seemed sufficient sufficient for the point I was making in the post before.
 
PUC,

you'll have to excuse me if I have to be a bit vague about this... I don't have the exact figures in front of me, but as I recollect it was in the high twenties (kN that is) for various pull configs on front hardware and rings.

This was supplementary testing not required for certification, as it passed the required tensile pull tests.
 
[ QUOTE ]

813 is a factor 2 fall on a 1m lanyard to the midriff seated suspension points (2m fall).


[/ QUOTE ]

Would the human skeleton withstand a fall like that?

Or would it begin to break up?

It would definately break up on the 4m dorsal test-

Snapped pelvis, splintered ribs, ruptured arteries and hamstrings. Torn skin, crushed veins, squashed and burst internal organs?

Not a nice thing to happen.
frown.gif


Be careful everyone
 
Buckingham Pro Series are rated for 300lbs. All I have seen from New Tribe and Weaver are ANSI compliant labels.Again it is funky monkey load rating. 5000 lb minimum tensile strength materials rated for 300lb sustained, repeated, daily use.
 
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
 
You must log in or register to reply here.

New threads New posts

Kask Stihl NORTHEASTERN Arborists Wesspur TreeStuff.com Teufelberger Westminster X-Rigging Teufelberger
Back
Top Bottom