Scantling determination - Is there a spreadsheet for sail yacht calculations (ABC)?

Discussion in 'Sailboats' started by chr_ramsdal, Apr 26, 2015.

  1. chr_ramsdal
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    chr_ramsdal Junior Member

    This would be very convenient as I am about to start on determining the required hull thickness and scantling dimensions for my fast 46 cruiser.

    Anyone? :)
     
  2. TANSL
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    TANSL Senior Member

    Have a look, if you think it should, on my software SCT (recreational boats ISO 12215). You can download it from my website. Not a worksheet because it has features that do not fit into a spreadsheet. If you decide to use it, I could help in using the program.
     
  3. rxcomposite
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    rxcomposite Senior Member

    >Is there a spreadsheet for sail yacht calculations (ABC)?<

    What does ABC means. Is this ABYC?
     
  4. DCockey
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    DCockey Senior Member

    Or ABS?
     
  5. TANSL
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    TANSL Senior Member

    In any case, that boat, in Europe, should comply with ISO 12215. Any other regulation will penalize the boat.
     
  6. daiquiri
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    daiquiri Engineering and Design

    For yachts under 24 meters, all classification societies now refer to ISO 12215 rules. So you will have to use those.
     
  7. rxcomposite
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    rxcomposite Senior Member

    Or LR SSC rules for motor, sailing, and auxillary craft.
     
  8. chr_ramsdal
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    chr_ramsdal Junior Member

    Sorry, I meant ABS. I have read that NBS (Nordic Boat Standard) is good to use because it takes the rig into consideration. Any thoughts on that? I just want to make it as simple as possible, and in compliance with ISO 12215 (which it seems all standards now seems to comply with?).

    I´ve found a nice example on how to make these types of calculations in the book "Principles of yacht design" by Larsson, Eliasson and Orych. I´m thinking about putting these formulas into a spreadsheet for simplification.:cool:
     
  9. TANSL
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    TANSL Senior Member

    Current regulations require certain checks for fiber hulls, not included in the formulas of that book. Therefore I will not recommend its use. In any case, if you want to get the "CE" marking for your boat, it is best that you use the ISO standard.
     
  10. chr_ramsdal
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    chr_ramsdal Junior Member

    OK, thanks for your advice, and for informing about your software TANSL. I´ll have a look at it.
     
  11. daiquiri
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    daiquiri Engineering and Design

    Just for your info, RX:
    SSC does not apply to yachts with L<= 24m. Here is an excerpt from the page 90 of the LR SSC pdf file - scope of the rules:
    SSC scope.gif
    As said before, all the classification societies now point to ISO standards in case of pleasure boats below 24 meters length.

    Cheers!
     
  12. TANSL
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    TANSL Senior Member

    Don't misunderstand me, please. You do not need at all my software. Just you need to get a copy of the ISO 12215-5 and follow their procedures.
     
  13. Ad Hoc
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    Ad Hoc Naval Architect

    D

    LR SSC rules does not apply to ANY vessel below 24m. BUT...you can still use them if you ask, since they will then review the results of the scantlings a on a case by case basis. Yacht, Workboat or otherwise.

    And any Flag state will have, or should, in their rules, Structure/Mech etc to be Class (or otherwise) complaint. Thus one can still elect to use SSC rules for a vessel below 24m, just means the scantlings may, or may not, be over what one would expect. Since below 24m sometimes leads to erroneous results.
     
  14. rxcomposite
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    rxcomposite Senior Member

    Daiquiri,

    My LR SSC rule says ..."motor, sailing and auxiliary craft..... not exceeding a length of 150 meters" Part 3 Chapter 1

    There was a discussion before on this ISO registration, if I remember correctly, If the vessel was built to Class, or built to class standard, the documentations will suffice/be accepted in lieu of ISO documentation.

    Depends on the flag state.
     

    Attached Files:


  15. rxcomposite
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    rxcomposite Senior Member

    ramsdal- The only software I have encountered that is in accordance with ABS standard is Autoship and it is for steel SHIPS (greater than 24m).
     
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