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  #41  
Old 02-20-2013
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Re: Double or single lifelines?

That might work. I guess I am not giving amsteel the credit it deserves. I seem to recall reading something a while back about the spliced eyes needing to be a certain size in order to not reduce the strength of the line (it was significantly weakened going around a small radius turn), is that still the case? If so then I guess I could just use a thimble.
Any suggestions for line for the lashings?
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  #42  
Old 02-21-2013
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Re: Double or single lifelines?

Yes, any line of any material is weakened if it's bent around a radius smaller than what is recommended. For instance, most rope manufacturers suggest an 8:1 ratio. So for 1/4" line you need a 2" sheave, thimble, whatever. I can tell you that you probably won't need to worry about it breaking. The stanchions will absorb a lot of the shock load. I just splice mine to the ring on the pullpits or lash them there. I'm using 1/4" line which works really well. 8600 lbs breaking strength is a little much and I'll probably drop it to 3/16 when I replace it. But the stuff is cheap and easy to splice, it's not like it takes 1/2 a day to change them out, or longer like it would w/ steel.

I use spiderline for lashing. Dyneema core with poly cover. You can use "Lash-it" as well, but it's more expensive and doesn't hold knots as well. I would change out the lashing every year as cheap insurance. A mini spool is only $16.
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  #43  
Old 02-21-2013
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Re: Double or single lifelines?

Quote:
Originally Posted by zz4gta View Post
...I can tell you that you probably won't need to worry about it breaking. The stanchions will absorb a lot of the shock load. I just splice mine to the ring on the pullpits or lash them there. I'm using 1/4" line which works really well. 8600 lbs breaking strength is a little much and I'll probably drop it to 3/16 when I replace it. But the stuff is cheap and easy to splice, it's not like it takes 1/2 a day to change them out, or longer like it would w/ steel....
8600 lb is probably more than needed, but before you go with 3/16" line remember that the tension on the line will be waaaay more than your body weight. You need to do the geometry here:


Also remember that the rated strength is for new line. As soon as it gets UV, weather, and chafe at the contact points, your actual tensile strength goes down.
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Old 02-21-2013
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Re: Double or single lifelines?

My point is, the stanchions will fail before the line does.
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