Question about weight ratings: Life support and other?

[tree md]

Well, if the diagram in my manual is right and the conversion is right, that means my heaviest gear loops are rated for right at 45# which is probably correct. It is saying maximum load not tensile strength. I can't imagine hanging anything 45# off of my saddle anyway. I guess I was confusing maximum load with tensile strength that's why it sounded so light to me.

 

[046]

hmmm.. Petzel Mini Boss
looks coool.. is it comfy?

 

[tree md]

hmmm.. Petzel Mini Boss
looks coool.. is it comfy?

Very comfy. Probably the nicest saddle I have climbed in. Definitely the most comfortable. I've only done a rec climb in it thus far though so we'll see how I like it after I spend a day working in it. I think you'd like it. I'll let you check it out next time we hook up.

 

[Bermie]

As its a European harness, check for the EN numbers, I can't recall what they are just now for work positioning harness attachments but there should be some indication. Also the CE mark (that's like the European ANSI)

If both are there, you are good to go!

 

[canopyboy]

Ok, from an engineering perspective....

A daN is a fairly common metric unit of force equal to 10 newtons. The dekanewton is equal to 1 megadyne, to 1.019 716 kilograms of force (kgf) or kiloponds (kp), to 2.248 09 pounds of force (lbf), and to 72.3301 poundals. In engineering, the dekanewton is a convenient substitute for the kilogram of force or kilopond, since it is nearly equal to those units.

Now that your head is starting to hurt, basically a daN is used because it is close to a kilogram. For us, a daN is about 2.25 lbs.

Note that it's not exactly equal to 1 kg force. That's because a kgf isn't 10N, but instead 9.81N. 9.81 m/s^2 is the acceleration of gravity in the metric system, and a newton is kilogram (mass) times gravity. We have pounds mass and pounds force in the english system, and even something called slugs which confuse the hell out of everyone. For us, gravity is 32.2 ft/s^2.

Come to think of it, they probably shouldn't let engineers near the final documentation for this type of stuff, no one can really figure out what it means.

 

[John Paul Sanborn]

kilograms of force (kgf) or kiloponds (kp)

Which is where the first conversion when awry, he saw pond (kp) but read pound (lb).

What was that old stoner humor routine: How many libs in a key? (lbs:kg)

 

[TreeClimber57]

Ok, from an engineering perspective....

A daN is a fairly common metric unit of force equal to 10 newtons. The dekanewton is equal to 1 megadyne, to 1.019 716 kilograms of force (kgf) or kiloponds (kp), to 2.248 09 pounds of force (lbf), and to 72.3301 poundals. In engineering, the dekanewton is a convenient substitute for the kilogram of force or kilopond, since it is nearly equal to those units.

Now that your head is starting to hurt, basically a daN is used because it is close to a kilogram. For us, a daN is about 2.25 lbs.

Note that it's not exactly equal to 1 kg force. That's because a kgf isn't 10N, but instead 9.81N. 9.81 m/s^2 is the acceleration of gravity in the metric system, and a newton is kilogram (mass) times gravity. We have pounds mass and pounds force in the english system, and even something called slugs which confuse the hell out of everyone. For us, gravity is 32.2 ft/s^2.

Come to think of it, they probably shouldn't let engineers near the final documentation for this type of stuff, no one can really figure out what it means.

Thanks ! That fills in my hand written notes from a few years ago.. So think we have the whole story now

 

[tree md]

Thanks for the input all.

I did look at the tag on the saddle and it does have both the CE and EN on it. I wasn't too concerned about the life support aspect. I'm sure Petzl is not going to market and sell a saddle that is not up to standard. Just by going on memory, I was thinking that the standard was a little higher and it might very well be here. Anyway I have no worries about the integrity of the saddle as far as life support.

I was really wanting to figure out what the SWL is for the gear loops. I wanted to know how safe my 200T is going to be hanging from one of them. The info on the daN and conversion is much appreciated.