Calculating the Thickness of Angled Welds: How Do I Determine the A-Dimension?

[Make]

Hi, ok, so the task is to define the thickness of th weld, the so-called a-dimension. If the welds were either vertical or horizontal, I'd have no problem, but they're not. So do I divide the force into components or perhaps the welds? What about how to calculate the moment caused by the force, what is the "lever" of the force on the welds? Any help sure would be appreciated! Thanks guys!

http://tenttiarkisto.fi/exams/9802.1.pdf

 

[nvn]

You could use tau = Ssa = F/[(2*L)(0.7071*a)], where Ssa = allowable shear stress.