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  1. #21
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    Does anyone know of a document or article where different sewing patterns were rated on strength? Maybe specifically with lightweight fabrics like we use.

    Like the bartacs vs the box x vs continuous zigzags. What is the min length to get a certain strength?

    I googled, but no decent results.

    I did find this from onrope1.com
    http://www.onrope1.com/GearDaisy.htm

  2. #22
    Senior Member JohnSawyer's Avatar
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    Quote Originally Posted by Cutter View Post
    Does anyone know of a document or article where different sewing patterns were rated on strength? Maybe specifically with lightweight fabrics like we use.

    Like the bartacs vs the box x vs continuous zigzags. What is the min length to get a certain strength?

    I googled, but no decent results.

    I did find this from onrope1.com
    http://www.onrope1.com/GearDaisy.htm
    http://www.caves.org/section/vertical/nhback/NH03.pdf

    I've used the HF straps with no issues. RE: Strength: They're 100% polyester. The 400lbs is WORKING load, where most straps are rated at their breaking strength. For polyester, I recall working strength is something like 1/4th or 1/5th the breaking strength. That would put your comparison point at 1600lbs+...

    I've used 3 bartacks (speer recommendation) and boxed X's (2) as well as longitudinal stitching with a 3" overlap. None of these has ever failed me.

    The biggest problem I've run into has been bottom tangles when trying to do bartacks on straps.
    "Do or do not, there is no try." -- Yoda


  3. #23
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    Thank you JS. That was what I was looking for. I am shocked on the first table where the box x has the lowest (but still very capable) breaking strength. I guess since they mention is always breaks at the threads, the box x has the least amount of threads.

    have a good'un
    cutter

  4. #24
    Ramblinrev's Avatar
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    Quote Originally Posted by JohnSawyer View Post
    [url]The biggest problem I've run into has been bottom tangles when trying to do bartacks on straps.
    Tighten the top tension.

    To avoid hijacking see a more complete discussion on my Top Tension and Bottom Loops thread
    I may be slow... But I sure am gimpy.

    "Bless you child, when you set out to thread a needle don't hold the thread still and fetch the needle up to it; hold the needle still and poke the thread at it; that's the way a woman most always does, but a man always does t'other way."
    Mrs. Loftus to Huck Finn

    We Don't Sew... We Make Gear! video series

    Important thread injector guidelines especially for Newbies

    Bobbin Tension - A Personal Viewpoint

  5. #25
    Ramblinrev's Avatar
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    Quote Originally Posted by JohnSawyer View Post
    The biggest problem I've run into has been bottom tangles when trying to do bartacks on straps.
    Tighten the top tension.

    To avoid hijacking see a more complete discussion on my Top Spool Tension and Bottom Loops thread
    I may be slow... But I sure am gimpy.

    "Bless you child, when you set out to thread a needle don't hold the thread still and fetch the needle up to it; hold the needle still and poke the thread at it; that's the way a woman most always does, but a man always does t'other way."
    Mrs. Loftus to Huck Finn

    We Don't Sew... We Make Gear! video series

    Important thread injector guidelines especially for Newbies

    Bobbin Tension - A Personal Viewpoint

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