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Our hammock: The forces to hold it

Alright folks,

the main purpose of this thread was to check my math with regards to structural properties of the situation, and, thankfully, that was sorted out (my idea was correct, but I did it the hard way and made an error of arithmetic somewhere).

I did buy 4 meters of better rope yesterday. Don't know how to translate this to your terms ("550 rope", "7500lb tensile strength" etc.). It had two numbers: One apparently for tensile strength, which I forgot, but it was a 4-digit thing in kg; another number was for - well, I don't know, there was a picture with rope horizontally, and a weight of 145kg pushing down vertically. I figured I would be totally on the safe side with this, and also it had a lable of "UV: +", meaning it is well suited for use in sunlight.

Next thing is to figure out which knots are best. My girl friend used to teach climbing, so she is the expert on knots, we'll do that later today.

Thanks to all who weighed in!
 
Oystein said:
I knew I wouldn't have to wait long for smart replies. Thanks, pals!

Yes, the rope is some cheap plastic, so yes, it will grow old in the sun.
No, I do not "jump" in the hammock, and we don't lay in it together, it's too simple and flimsy for that.
I thought of looping, but having the rope double does not cut the strain in half, this only happens if they can move against each other with no or little resistance, as in a pulley. But that is still better than nothing.

I am also experimenting with knots. One end is fixed with a carabiner, on the other I prefer a rolling hitch, which depends on some starin to hold. Doubling the rope might give me too little pull.
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How far are you from the ocean, or a lake large enough to have a yachting port? If convinient go there and get a good rope (there will be an accessory shop). They run into breaking strengths of hundreds of kilos, and they can stand the sun for years. They are pretty expensive, but you can buy them per lenght, so you don't have to get any surplus. Also, they look nice.

Hans
 
MRC_Hans said:
How far are you from the ocean, or a lake large enough to have a yachting port? If convinient go there and get a good rope (there will be an accessory shop). They run into breaking strengths of hundreds of kilos, and they can stand the sun for years. They are pretty expensive, but you can buy them per lenght, so you don't have to get any surplus. Also, they look nice.

Hans
Click to expand...

3 hours to the Dutch coast. We have an excellent outdoor equipment store in town where I would expect to find quality climbing equipment (ropes made to hold humans in the worst of conditions) and possibly some sailing equipment, too.
But I already got some good enough rope now. It's still only a hammock, and I won't be using it in stormy weather :D
 
I had the railing come off the wall which turned out to be made of compressed guano.
Yours looks sturdier.

So, what happened? Broken coccyx?
 
Oystein said:
Next thing is to figure out which knots are best. My girl friend used to teach climbing, so she is the expert on knots, we'll do that later today.
Click to expand...

Just follow the one simple rule: Can't tie a knot? Tie a lot!
 
lemurien said:
I had the railing come off the wall which turned out to be made of compressed guano.
Yours looks sturdier.

So, what happened? Broken coccyx?
Click to expand...

I am currently running observations on my girl friend in the hammock. She did three palsteks, and I attached the final rolling hitch. So far everything's fine :D
 
I believe we'll need photo evidence of girlfriend in hammock to determine if this was a valid experiment.
 
I hope that these pauses in observation are filled with passion, in the hammock or elsewhere...I remember how exciting it was to make love on the balcony, watching the people down on the road...

Why is it people get old and stiff in all the wrong places?
I hate it!
 
Sideroxylon said:
...
Me, too. Reminds me of why I come to this place.
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Yes, absolutely. To pass idle time and rest (when it isn't warm on the terrace), my girl friend watches daily soaps and show bizz news, and I read and chat on JREF. She thinks I am wasting my time... :p


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lemurien said:
I hope that these pauses in observation are filled with passion, in the hammock or elsewhere...I remember how exciting it was to make love on the balcony, watching the people down on the road...

Why is it people get old and stiff in all the wrong places?
I hate it!
Click to expand...

Hmm well, two problems:
1. Hammock is too small for the two of us
2. Four of the neighbouring houses have rooftop terraces at about the same level. It's nice for a little small talk and sharing experiences with potted plants, not so nice for relaxed love-making :o
 
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