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Transparent Method to Calculate Shell Loads by Brackets

Transparent Method to Calculate Shell Loads by Brackets

Transparent Method to Calculate Shell Loads by Brackets

(OP)
I'm looking for a transparent method of determining allowable loads on tank shell by brackets, for example, a platform support bracket. I'm familiar with a method that's been passed down; it calculates the max allowable moment, as M=1390t^2(6+6BL+(B^2)(L^2)). I'd like to know what's in the coefficient 1390, B=1.285/sqrt(Rt) is also used in API 650 Appendix P. I'm also familiar with a method published by Blodgett (Lincoln Book) that also uses undefined coefficients. Can anyone help me get to the root of the above mentioned methods to determine max shell loads? Can anyone provide a more transparent method, or direction to determine max loads/stresses in large diameter shell plate myself?

 

RE: Transparent Method to Calculate Shell Loads by Brackets

where is the material strength in this ? steel ? (probably)

RE: Transparent Method to Calculate Shell Loads by Brackets

(OP)
A36 steel

RE: Transparent Method to Calculate Shell Loads by Brackets

you're working metric ? i'm guessing "1390" is something to do with Ftu (possibly fty or fcy)

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