Help rope

[Life_and_Death]

wow i dont even know where to start with my questions. basically i think i understand but i want to double check.

ok so the rope i have is 6mm. (i can get more if need be and from what im looking at probably anyway whether i need more or not we're going to use this measurement for this)

it says a 6mm has a minimum breaking strength of 540lbf. "A pound-force (lbf) is a non-SI (non-System International) measurement unit of force. The pound-force is equal to a mass of one avoirdupois pound multiplied by the standard acceleration due to gravity on Earth, which is defined as exactly 9.80665 meter per second." so if i attach a brick or something to it to weight it down tie to to the top of a building or cliff then throw it, it will break? (assuming the height is high enough which how high that is is unknown to me)

safe load 45lbf. so this would be the ideal weight? also what does safety factor of 12 mean?

and the last thing says the weight is 0.018lbm/ft. is this how much it weights or how much it can handle?

i thought it was going to be simpler then this. im not making that mistake again. also once i went through my questions i realized i understand nothing lol.

Manila Ropes - Strength

Minimum breaking strength and safe load of manila 3-strand rope.

www.engineeringtoolbox.com

edit: oh i should probably add im about 125lbs. but if someone can just explain how the math works and what everything means i can do the math myself.

 

[LastWhisper]

I did some math when I bought a rope, it's 12mm and has 600 kgf (I'm around 80 kg), but I can only provide in SI. So, if I'm not mistake, for my rope it will be like this:

1 kgf = 10 N
F = 9.8 N
1 N = 0.1 kgf

A person weighing 80 kg will press on the earth with a force of 80 * 9.8 and it will be expressed in Newtons, and not in kilograms.
80 * 10 = 800 N
600 kgf = 6000 N
100 kgf/m2 ~= 1 kPa = 1 kN/m2

 

[Life_and_Death]

I did some math when I bought a rope, it's 12mm and has 600 kgf (I'm around 80 kg), but I can only provide in SI. So, if I'm not mistake, for my rope it will be like this:

1 kgf = 10 N
F = 9.8 N
1 N = 0.1 kgf

A person weighing 80 kg will press on the earth with a force of 80 * 9.8 and it will be expressed in Newtons, and not in kilograms.
80 * 10 = 800 N
600 kgf = 6000 N
100 kgf/m2 ~= 1 kPa = 1 kN/m2

i think im starting to understand it. would the *10 be the same for lbs? i dont want to just assume it is.

edit. also where did you get that last line of math

 

[LastWhisper]

i think im starting to understand it. would the *10 be the same for lbs? i dont want to just assume it is.

edit. also where did you get that last line of math

No idea, never dealt with non-SI system. You can convert lbs to kg to calculate the final values and then convert it back.

Last line is from wiki, but for some reason it's missing in English version:

 

[Life_and_Death]

No idea, never dealt with non-SI system. You can convert lbs to kg to calculate the final values and then convert it back.

this doesnt sound like a bad idea. ok ill try this
i did find this

Calculating Breaking Strength, Safe Work Load and Weight of Hawserlaid Ropes

CALCULATION OF APPROXIMATE BREAKING STRENGTH (B.S) AND SAFE WORKING LOAD (S.W.L) FOR MANILA ROPE Method of finding the Breaking Strength...

www.mranil.in

6squared/200
36/200
.18tonnes = a little under 400pounds......for a small rope? really? if this is accurate im impressed