Question is this. If each carabiner I want to use at each tree strap end of suspension to attach hammock line to is rated at 200 pound strength, are the two sharing the work of suspending the hammock with me in it???? So if I weigh 160 pounds, is each "biner" really only supporting about 80 pounds..... If so then using the 200 pound rated ones i have should be way more than adequate correct??
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William36
Question is this.
If each carabiner I want to use at each tree strap end of suspension to attach hammock line to is rated at 200 pound strength, are the two sharing the work of suspending the hammock with me in it????
So if I weigh 160 pounds, is each "biner" really only supporting about 80 pounds.....
If so then using the 200 pound rated ones i have should be way more than adequate correct??
William36
I realize I may get, and would appreciate all the physics, angle calculations etc. but generally I mean is the above theory correct??
Timberrr
On a related note...
Someone please tell me what a 'kn' is. I know it's a strength rating for carabiners but does it translate into 'X' number of pounds? Or any other comprehensible (useful) scale? I'm :confused: confused.
gnar
not sure, but I dont think it works that way?? imho I think that each line would bare its own load, so wouldnt both lines be supporting the entire load?
gmcttr
So if I weigh 160 pounds, is each "biner" really only supporting about 80 pounds.....
If so then using the 200 pound rated ones i have should be way more than adequate correct??
Nope. At a 30 degree hang angle, each end will see your full weight of 160 lbs.
Move the weight up and down with your mouse to see the effect of the hang angle....http://tagsafety.com/library6.asp
Here's a little experiment I did last year...https://www.hammockforums.net/forum/showpost.php?p=753349&postcount=16
On a related note...
Someone please tell me what a 'kn' is...
1 Kilonewton = 224.8 pound-force.
William36
The kn concept I get. Caribiners are not truly rated for how much weight they will "hold", but kinda how much more weight or more accurately "force" it will catch or "stop" without breaking or failing. They are rated to " catch" a person or object after a slippage or falling while for example rock climbing.
A Kn = 224 pound force. Whatever the hell a pound force is????
But at least I grasp he "stopping" concept I think.
mattyg
kn =kilo newton. humans are not an equally distributed load and there is the whole angle and force thing where you can put more load then the suspended object. also when you climb in and out you create a dynamic load which can also exert a force greater than your mass. or so im told
1 kilonewton =
224.808943 pounds force
Bubba
I think most hangers here like to operate with a safety factor of 5 to 1 for any hammock suspension and related hardware. Some use higher but its good to have that safety margin for dynamic forces that may occur.
William36
So by those "rules" my 200 or 250 pound carabiners and 200 pound rings are woefully under rated?????
William36
This seems like one of those stories thats going to end like every other one that starts with me saying "Hey kids watch this.....!!!"
Next part of that story is me on the way to the ER....
iRokk
You can pick up the CAMP USA nano biners, which i'm pretty sure are rated at 23 or 24 Kn? They are also wonderfully lightweight.
gmcttr
...that starts with me saying "Hey kids watch....
Or the ever popular..."here, hold my beer".:laugh:
You did see this thread (https://www.hammockforums.net/forum/showthread.php?t=78025) didn't you?
nothermark
So by those "rules" my 200 or 250 pound carabiners and 200 pound rings are woefully under rated?????
Yes, they are under rated. It's not rules, It's science. Data from testing when things bend/break and how much load you are really putting on your lines. The steeper the hang angle the lower the load but the harder it may be to get comfortable. The flatter the angle the higher the load. Flattish angles like slack rope folks use actually tension the line at several thousand times the load weight. Play with the calculator and move the weight up and down and you will see.
Nodust
Nope. At a 30 degree hang angle, each end will see your full weight of 160 lbs.
Move the weight up and down with your mouse to see the effect of the hang angle....http://tagsafety.com/library6.asp
Here's a little experiment I did last year...https://www.hammockforums.net/forum/showpost.php?p=753349&postcount=16
1 Kilonewton = 224.8 pound-force.
That website is a great place to explain angles and weight loads. Very nice. We did some similar test in high angle rescue training. hung a 10lbs weight between two ropes and changed the angle of hang. Had a scale on one rope so we could see exactly how much load was on it. We try not to go less than 45 degrees for lifting people.
Timberrr
kn =kilo newton. humans are not an equally distributed load and there is the whole angle and force thing where you can put more load then the suspended object. also when you climb in and out you create a dynamic load which can also exert a force greater than your mass. or so im told
1 kilonewton =
224.808943 pounds force
:confused: :confused: :confused:
Okay. Fine. A kilonewton. So. Is that like a 2.2 pound fig newton?? 'cause I love fig newtons!
:drool: :wuv: :drool:
gmcttr
:...Is that like a 2.2 pound fig newton?? 'cause I love fig newtons!
:drool: :wuv: :drool:
Why yes it is...just be aware the a single biner rated at 23 Kn has a butt load of calories.:lol:
pepsiaddict60
A 100 lb child bouncing into a hammock with two 200+ steel carabiners form Home Depot will deform at least one of the carabiners with in a week.
GT
Yeah, personally I wouldn't use a 200lb rated biner for life support.
You can pick up an aluminum 4000lb Nano or any other climbers biner for around $5 ea. and feel a whole let safer.
Most of those 100lb and 200lb biners say, "Not for Climbing" on them. Which to me translate to, "Not for Hanging."
SmokeBait
We always recommend climbing rated carabiners. The C.A.M.P. Nano 23 has become one of our favorites.
Jsaults
One Newton is equal to the weight of one average apple. The fruit, that is.
Jim
Tuckahoe
We always recommend climbing rated carabiners. The C.A.M.P. Nano 23 has become one of our favorites.
+1. This! Bought the CAMP Nano 23 from SmokeBait/Whoopieslings at $5.50 each. Shipped Friday and arrived today.
iHang
So by those "rules" my 200 or 250 pound carabiners and 200 pound rings are woefully under rated?????
Not even close to "safe"
Zilla
All i know is that i weigh in at about 350lbs and refuse to stop hanging,When i contacted stu over at whoopieslings.com he suggested i go up a cord size on my whoopies and agreed to make me a set from 1/8 amsteel blue. After trying them out and having no problems at all i decided to go alittle overboard and make myself a set froom 3/16th amsteel,cost about twenty bucks for the cord but they feel soooo much safer (5,600lbs rated) the thicker cord just feels better,,went ahead and bought alittle more 3/16 and made myself some soft shackles,not only do i know that i am more than safe but using the soft shackles also cut down my pack weight. It also kinda feels good to look at my rig and know that i made most of my setup myself, gotta give dutch some credit because of the dutch buckle setup with the camo webbing. Also if you are thinking about making yourself an upgraded set of whoopies you can find the cordage at redden marine, i have not been able to find it cheaper anywhere.If anyone wants a set of 3/16th size whoopies and dont know how to make them you can contact me and i would be able to make a pair for you ,I am sure we can work something out
SAEDY