ABS side stringer calcs

Discussion in 'Class Societies' started by Mitch1990, Jun 4, 2020.

  1. Mitch1990
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    Mitch1990 Junior Member

    Hi,

    I am struggling with the definition of h and s in the below SM calculation. I have completed the hull girder SM calculations and am now working through the individual components to ensure they too are compliant.

    upload_2020-6-4_20-8-26.png

    Mitch
     
  2. Ad Hoc
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    Ad Hoc Naval Architect

    Can you quote the full rule citation for clarity please.
    As there is usually a diagram/figure associated with each nomenclature.
     
  3. jehardiman
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    jehardiman Senior Member

    Have you taken a steel structural design course? Or a ship structures course? Then this would all make sense, and really it would be unnecessary to explain. I hope this is only for a class, and not a real ship, because you are not presenting well.
    Anyway, see the attached figure....
    Midships.png
    X-post with Ad Hoc.
     
  4. Mitch1990
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    Mitch1990 Junior Member

    It is part of a course. Why doesn't the ABS come with something like this?
     
  5. Mitch1990
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    Mitch1990 Junior Member

    It is steel vessels under 90m , Part 3 Ch 2 Section 5. There are no drawings or diagrams, just words that until jhardiman posted were in a foreign language.
     
  6. jehardiman
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    jehardiman Senior Member

    Because you should know it....I'm sure your professor has used all these terms before....And yes, every NA student has to construct a midships section as a graded class assignment at one time or another,
     
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  7. Mitch1990
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    Mitch1990 Junior Member

    Whilst on the subject of ABS, what is a longitudinal side frame. I only have sea experience (in case it wasn't obvious) and frames have always been transverse whilst longitudinals have been, well, longitudinal.
     
  8. Mitch1990
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    Mitch1990 Junior Member

    This is the extant of my structures notes, there is a few cross-sections to show the different framing methodologies.
    upload_2020-6-4_21-20-9.png
     
  9. jehardiman
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    jehardiman Senior Member

    What school are you at in Maine? Because I know Maine Maritime teaches better than that based on the few who have passed about me. Getting back to the steel structures class, do you understand why h and s are factors but plate thickness is not? Understand that and it should all make sense.
     
  10. Mitch1990
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    Mitch1990 Junior Member

    I am not studying in Maine, I am studying remotely whilst living in Maine. A half length is half the distance between two members? I have no useful thoughts on why h and s are factors but plate thickness is not.
     
  11. jehardiman
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    jehardiman Senior Member

    Perhaps you should ask your instructor to explain the Isherwood system, and why longitudinal frames (bottom, side or tank) are discontinuous.
    Edit to add or get Introduction to Steel Shipbuilding by Elijah Baker
     
  12. Mitch1990
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    Mitch1990 Junior Member

    I will get the book, I have no real time interaction with my instructor, our only comms is email. Thanks for all your help guys, this forum has been a great help to me.
     
  13. Ad Hoc
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    Ad Hoc Naval Architect

    And Ship Construction by DJ Eyres.

    The rest... what JEH said...!!
     

  14. TANSL
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    TANSL Senior Member

    @Mitch1990 , I fully understand the difficulties that may have to follow a course remotely, online, and I also understand that interpreting the rules of a Classification Society can be a complicated task especially if one is not very used to technical terminology. Therefore, instead of telling you that you have no idea and that when you are older, if you have been good, you will know as much as I do, I offer myself, within my possibilities, to help you in what you need but, if it does not matter, by private messages, not to encourage, and to waste time, the great gurus of this forum.
    Do not be bothered by my words, gentlemen, I just want to raise the morale of this man and clarify that in this forum, in addition to great words, you can get help, practical help, not generalities but resolution of the specific problem that the OP exposes to us.
     
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