polyester rope.

[potholer]

Rough calculation:

Given a horizontal traverse line, tight, with knots fully inline with the pull, but without huge extra tension, 5% stretch would give an angle of 145 degrees, at which angle, the tension would be about 1.6x bodyweight.

Seems likely that with a ~4% stretch rope, a person just hanging on it is likely to end up at somewhere in the 130-140 degree area, unless the line was seriously pre-tightened.

 

[Agrophobic]

Mailed to you Bob.

Sounds a bit more re-assuring when you put it like that potholer

 

[Bob Mehew]

I have just had a chance to compare the specification by Marlow for their ?Marlow 11 mm abseiling rope? (thanks Agrophobic) with the British Standard requirement for SRT ropes (BS EN 1891:1998). I note there is a difference in the number of falls which the rope must sustain without ?releasing the mass? (or breaking in simple terms).  SRT ropes are required to achieve at least 5 falls as is the 11 mm abseiling rope with a spliced eye.  However, if the termination is made with a knot, this figure drops to just 2.