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Suspending a winch d-ring from ceiling

  1. Dec 24, 2016 #1
    I recently attached a trailer tying ring (3 1/2" x 3 1/2" d-ring with loop pressed into the hardware mounting plate) from a roof truss in a storage unit. The ring is rated for 1000+ pounds. My purpose was a boat motor lifting system. It worked great with an attached block and tackle and was effortless. Since I attached the ring system vertically to a roof truss stud, the ring holding rating capacity may be lower since the weight is now suspended by two 3/8" lag bolts that are attached with a backup plate and compression on the 2 x 4. Can someone give me a reference for calculating the holding power of such a system? Thank you.
     
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  3. Dec 24, 2016 #2

    CWatters

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  4. Dec 24, 2016 #3

    JBA

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  5. Dec 24, 2016 #4

    berkeman

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    Staff: Mentor

    Welcome to the PF.

    Does the owner of the storage unit know you are doing this? You should consider just renting or buying a motor lift instead -- that would be much less risky. Thread is closed.

    http://vikinggarageequipment.com/equipment-images/jack_aff_other_3580.png
    jack_aff_other_3580.png
     
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