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General Climbing Discussion

Topic Date User

tyrolean traverse 19-Nov-2011 At 10:41:58 PM lacto

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>Seems like an awful lot if it is cm...
>~> an example; suppose one has a span = 2m, therefore 'centre' is 1m out,
>therefore sag = 32cm?? (If I have followed lacto's post correctly). It
>is certainly possible to have that much sag, but with a drum tight rope
>in the above example, and bodyweight loading, I would not expect that much
>sag.
>~> Am almost inspired to go and play with a static rope now!
>
>As an aside, I think Bluewater ropes consider a static has <3% stretch,
>but have not been to their website recently to confirm this.

simple rightangle triangle and pythagorus

base is 1 ,s ag is X and hypotenuse is 1.05 (5% stretch ) so X = square root of (1.05X1.05 -1X1) or the root of (1.1025-1 =0.1025) or 0.320156 or 32 cm from this you can scale the force in the rope by half the weight as load carried by rope on bothside of the load divides by 0.32 X1.05 to give answer in kg convert to N by multiplying by 10