ASME VIII Div 2 meaning of b - unit width - for non circular vessel

[Astronoza]

Referring to ASME VIII div.2 §4.12.11.1 Nomenclature what is 'b'?

For calculation of I1 = Moment of Inertia of strip thickness t1 (t1 = short side plate thickness)

b - unit width per cross section. In the equations for the areas, moments of inertia, and bending moments for all vessel configurations without external reinforcements are given for cross sections with a unit width

I'm confused, is this overall width of the cross section or is it a depth? What does it mean by strip thickness?

 

[IdanPV]

Hi,

It is the overall width of the cross section, depth has no meaning in this case.

When calculating the Moment of Inertia, (b*t^3/12), t is the section thickness and b is the section width and for the cases of non-circular vessels without external reinforcements, the Moment of Inertia shall be calculated for a strip with a width of 1.0.

See PTB-4, 4.12.1.

 

[Astronoza]

Thank you!!!! @IdanPV

Wow I can't believe I hadn't looked at at PTB-4.

best regards!