# (DNV) Deck Girder Design question

Discussion in 'Class Societies' started by squivo, May 30, 2007.

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### squivoJunior Member

Hi all...

I was working in a college project and I need to design the deck girder scantlings using DNV rules. But I have some doubts about it and I hope you can help me out. In Pt.3 Ch.1 Sec.8 - D 100 (Girders) - of DNV Rules, there is a statement that the thickness of girder web plates is not to be less than:
t = 12 s + tk
My question is: What this "s" stands for, it wasn't very clear to me on the rules. Would it be the girder transverse stiffener spacing or the deck longitudinals spacing? Or neither?

Another question:
In the same section, but on D200 - Simple Girders, there is the following formula for section modulus:
Z = (100 x S^2 x b x p x wk) / sigma

It wasn't clear to me the S and b. Could you clarify?

Thanks a lot

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### StianMSenior Member

I think you would be able to find all the information on the DNV homepage www.dnv.no

I did drav some side web and deck grider befour, but I think that was ABS class. I could draw a grider for you as a exsample if you would like.

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### squivoJunior Member

Thanks, but the website couldn't help me with my question. I wouldn't have many use to an aleatory girder design, because I need it according to the DNV rules I specified. Thanks anyway.

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### Dutch PeterSenior Member

s is normally frame spacing, S the spacing between primary structures and b breadth. Is there not a section with the definitions?

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