unsupported span

Discussion in 'Boat Design' started by Hisham, Nov 18, 2007.

  1. Hisham
    Joined: Oct 2005
    Posts: 49
    Likes: 2, Points: 0, Legacy Rep: 28
    Location: Egypt

    Hisham Marine engineer

    Hi all

    I have a simle question

    in longitudinal systems what is meant by unsupported span for the deck center girder CG ?
    is it the spacing between (transverse Web Frames) or the distance between the two BKHD (Bulkheads) that are carrying the CG ?

    i am using GL

    is it the same in BV?

    hope to find the answer here?

    thanks all
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  2. alan white
    Joined: Mar 2007
    Posts: 3,731
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    Location: maine

    alan white Senior Member

    Between bulkheads. The web frames are supported by, but do not support, the girder. They (the web frames) also have unsupported spans of their own.
    Those letter designations are not common building terms.
    Are you reading a plan? CG, for example, is empirically understood to mean Center of Gravity. Your're using terms that have different or no meaning outside of your particular circumstances/plans.


    Alan
     
  3. Hisham
    Joined: Oct 2005
    Posts: 49
    Likes: 2, Points: 0, Legacy Rep: 28
    Location: Egypt

    Hisham Marine engineer

    you mean that the, unsupported span for deck girders is from bulkhead to another? right

    thanks for help

    :)
     

  4. Arvy
    Joined: Jun 2005
    Posts: 117
    Likes: 4, Points: 0, Legacy Rep: 44
    Location: Netherlands

    Arvy Senior Member

    Hi Alan,

    I assume this only counts for the deck center girder and not for the other longitudinals (stringers) as those are supported by the transverse webframes.
    Or am I mistaken here?
     
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