5/16" Line to Small for Halyard? - SailNet Community
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post #1 of 9 Old 01-28-2012 Thread Starter
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Question 5/16" Line to Small for Halyard?

I am looking to run my main halyard back to the cockpit on my Montgomery 17. I have few blocks that I would like to use that accommodate up to a 5/16" line. Does this line have enough strength to be used for this on a 17' sailboat?

From what I have read from various Google finds it should be fine. Just figured it wouldn't hurt to run it by Sailnet first....

What you think?

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post #2 of 9 Old 01-28-2012
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I think mine are 3/8", so 5/16" would be fine on yours I think.

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1974 C&C27 MkII

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post #3 of 9 Old 01-28-2012
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Generally the diameter of a rope is decided according to the handling characteristics than its load carrying capacity. 5/16 is more than enough to handle your loads. The only problem is you trying to pull the rope. If you are happy with it, use it.
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Last edited by celenoglu; 01-28-2012 at 03:38 AM.
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post #4 of 9 Old 01-28-2012
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Yes, 5/16 will be strong enough; as celenoglu indicated it might be a bit hard on the hands, but for halyard use that may not be a big deal.. you're not 'handling' it all the time like you would a sheet.

If it does become a problem you can always stitch on the cover from a 3/8 double braid line for the section from the tail to where the hoisted line meets the cleat (or buy 3/8 and strip the cover of the other half..).

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post #5 of 9 Old 01-28-2012
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What Faster said.
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post #6 of 9 Old 01-28-2012 Thread Starter
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Excellent! Exactly what I wanted to hear.

Thank you all!

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post #7 of 9 Old 01-28-2012
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I used 1/4" on my m17 and is was fine.
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post #8 of 9 Old 01-28-2012
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5/16" is fine. IMHO its more than enough. I use 1/4" halyards on my 25 footer.

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post #9 of 9 Old 01-29-2012
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There's quite a range in how strong lines are and for halyards stretch matters a lot for top performance. The cheapest 5/16" rope you might by a hardware store isn't strong enough. But a low end sailing line like Samson LS or NE Sta-Set would be more than strong enough in 5/16". You'd be fine with 1/4". Racing dinghies with a main sail your size would use a high-tech line that's 3/16" or even 1/8".
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