HELP! Hull is Sagging! I don't know what to do!

Discussion in 'Boatbuilding' started by CatBuilder, Mar 21, 2011.

  1. CatBuilder

    CatBuilder Previous Member

    I'm not moving the mold. Way too risky. Half hulls need to be perfect matches when joined.
     
  2. hoytedow
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    hoytedow Wood Butcher

    Are the hooks as close to hull as possible?
     

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  3. TeddyDiver
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    TeddyDiver Gollywobbler

    Before the next hoist you could take your lifts to local welder and do a modification to get next half of easier and it might help also when you are lifting a half on top of another later..
     

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  4. CatBuilder

    CatBuilder Previous Member

    No, I can't. They will become derated and will not be able to lift the load without danger to myself and the hull.
     
  5. hoytedow
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    hoytedow Wood Butcher

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  6. CatBuilder

    CatBuilder Previous Member

    Those are $6000 each.
     
  7. hoytedow
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    hoytedow Wood Butcher

    Ouch! My heart! My heart!
     

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  8. hoytedow
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    hoytedow Wood Butcher

    Used ones?
     
  9. hoytedow
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    hoytedow Wood Butcher

    Rented?
     
  10. hoytedow
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    hoytedow Wood Butcher

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  11. AndrewK
    Joined: Mar 2007
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    AndrewK Senior Member

    Yes, refer to green text. Also there are longitudinal floor and bunk top landings and shelves that can go in at this stage. These will act as stringers and prevent some of the sag as well as lock in the shape while the half is in storage with out the outer laminate.
     
  12. viking north
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    viking north VINLAND

    Catbuilder, to gain a few inches simply add a short section to the lifting arms. This will reduce their lifting weights but i don't think this will be a factor in your case. Geo
     
  13. hoytedow
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    hoytedow Wood Butcher

    Yes.

    This will work.

    Numbers are conjectural but the ratios are not.
     

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  14. hoytedow
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    hoytedow Wood Butcher

    No drilling, bolting or welding of original crane. These would be temporary extensions which slide over the original arms, held on with clamps.
     

  15. hoytedow
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    hoytedow Wood Butcher

    Of course the front wheels of the base of the unit would have to be directly beneath the hook at the very least, otherwise it will tip forward, unless you add adequate counter-weights to the back.
     

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