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Twisted straps were singing in the wind

Discussion in 'Expediter and Hot Shot Trucking Forum' started by rccarlson22, Sep 18, 2020.

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  1. Sep 18, 2020 #1
    rccarlson22

    rccarlson22 Medium Load Member

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    Anything taller than about 3 feet gets a twisted strap on the trailer. Have never had an issue

    I ran two coils about 6 feet tall, chained them like normal but I threw a strap over the top because redundancy. However, the straps were still singing the whole ride. I put my whole 225lbs cinching them down.

    Any idea why? Should I have done an extra twist on them? Is there such thing as too much twist?
     
    rccarlson22, Sep 18, 2020
    rccarlson22, Sep 18, 2020
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  3. Sep 18, 2020 #2
    D.Tibbitt

    D.Tibbitt Road Train Member

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    Half twist is all it needs . Even when they get loose the twist keeps them from vibrating. Not sure how or why it works but it does. Are u using 4inch straps .? Or smaller ?
     
    D.Tibbitt, Sep 18, 2020
    D.Tibbitt, Sep 18, 2020
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  4. Sep 19, 2020 #3
    rccarlson22

    rccarlson22 Medium Load Member

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    Yes 4 inch straps. They had the half twist on each side
     
    rccarlson22, Sep 19, 2020
    rccarlson22, Sep 19, 2020
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  5. Sep 19, 2020 #4
    okiedokie

    okiedokie Road Train Member

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    Straight straps act like an airfoil. Hence vibration.
     
    okiedokie, Sep 19, 2020
    okiedokie, Sep 19, 2020
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  7. Sep 19, 2020 #5
    rccarlson22

    rccarlson22 Medium Load Member

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    Yeah I had them twisted and I cranked them down with everything gravity and me could give. They were still flapping
     
    rccarlson22, Sep 19, 2020
    rccarlson22, Sep 19, 2020
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  8. Sep 19, 2020 #6
    okiedokie

    okiedokie Road Train Member

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    Well you were going at highway speeds so yeah they still vibrate sometimes even twisted.
     
    okiedokie, Sep 19, 2020
    okiedokie, Sep 19, 2020
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  9. Sep 19, 2020 #7
    MericanMade

    MericanMade Heavy Load Member

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    Too many twists will vibrate IME. I almost majored in aerospace engineering, but switched to systems engineering, so beyond that tidbit, I can’t help you.
     
    MericanMade, Sep 19, 2020
    MericanMade, Sep 19, 2020
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  10. Sep 19, 2020 #8
    D.Tibbitt

    D.Tibbitt Road Train Member

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    Were they at an angle ? U said u secured a coil with them so u put strap directly across the rub rail or was it more diagonal across the coil?
     
    D.Tibbitt, Sep 19, 2020
    D.Tibbitt, Sep 19, 2020
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  11. Sep 21, 2020 #9
    singlescrewshaker

    singlescrewshaker Road Train Member

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    Did you make sure the c shape of the twist is facing forward, ie into the wind.?
    If the u shape is forward it will scoop the wind & vibrate..

    When I put a half twist, put a click our 2 on the winch. Manipulate the strap by hand so C is into the wind, then give'er..

    Zoom in, can see the rounded edge forward on all but the 4th one from the front.. I missed one, but low enough it didn't matter..

    20200327_172603.jpg
     
    singlescrewshaker, Sep 21, 2020
    singlescrewshaker, Sep 21, 2020
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  12. Sep 23, 2020 #10
    rccarlson22

    rccarlson22 Medium Load Member

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    No angle, the strap went over the tallest point of the coil, in line with the center hole. I ran it inside the rub rail.
     
    rccarlson22, Sep 23, 2020
    rccarlson22, Sep 23, 2020
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