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Thread: Cyclone rods

  1. #1
    Join Date
    Mar 2009
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    Texas
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    2,895

    Default Cyclone rods

    I was looking at tie-down devices for my cabin and ran across cyclone rods. This appears to be an Australian term. It is a rod that extends from the foundation and through the bottom and top plates. It is intended to resist the uplift on the structure if wind pressure gets inside the building (I think).

    Iíve run across hurricane straps around on the Gulf coast although I thought those were intended to run diagonally across walls but I have not heard of anything like a cyclone rod.

    Are they used in the states? Maybe under a different name. Or just threaded rod?

    Thanks

    Tom

  2. #2
    Join Date
    Apr 1999
    Location
    Hyannis, MA, USA
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    46,804

    Default Re: Cyclone rods

    Chains atop Mt. Washington. For many years this spot had the highest surface wind speed, 231 mph, but in the late '90s a higher wind was recorded in a cyclone.


  3. #3
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    Mar 2009
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    Texas
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    Default Re: Cyclone rods

    Ha! That would be an interesting look.

  4. #4
    Join Date
    Jul 2017
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    huntsville, al, usa
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    Default Re: Cyclone rods

    i have the whole Simpson catalog and they make so many different products for high wind applications. there's flat metal strapping between wood members, concrete anchors with threaded rod to go to the tops of the walls, rafter straps, truss seats, and on and on and on. basically, they have 100 ways to skin that cat. if that is something you're interested in doing, try looking at them. they're pretty much the industry standard and hey, they have a facility right there in McKinney TX

  5. #5
    Join Date
    Mar 2017
    Location
    Indian Land, SC, USA
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    1,212

    Default Re: Cyclone rods

    Tom, perhaps similar in function to mobile / modular home tiedowns, which if I recall are flat steel strapping over the sbeathing, under the siding and are attached to anchors / piers to resist tornado or hurricane winds. It's been 20 years since I worked with them, memory gets fuzzy.

  6. #6
    Join Date
    May 2005
    Location
    Bradford, VT
    Posts
    7,127

    Default Re: Cyclone rods

    Mt Washington is holding on to highest wind speed recorded by a human being, right there. Other, higher speeds, were recorded remotely

  7. #7
    Join Date
    Jul 2017
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    huntsville, al, usa
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    Default Re: Cyclone rods

    here's a link for the online catalog

    https://www.strongtie.com/resources/...ectors-catalog

    there's a LOT to see in there. they'll have an application for anything you're trying to do. be it new construction or a retro fit.try looking in the "hold down and tension ties" and the "straps and ties" sections.

  8. #8
    Join Date
    Mar 2009
    Location
    Texas
    Posts
    2,895

    Default Re: Cyclone rods

    Thanks all. It looks like Simpson has a bigger selection than I realized.

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