What is the strength of weld per mm length used to connect two plates of 10mm thickness using a lap joint?

What is the strength of weld per mm length used to connect two plates of 10mm thickness using a lap joint? Correct Answer 795.36 N/mm

Minimum size of weld = 3mm Maximum size of weld = 10-1.5 = 8.5mm Assume weld size = 6mm Effective throat thickness, te = 0.7 x 6 = 4.2mm Strength of weld = te = 410 x 4.2 /(√3 x 1.25) = 795.36 N/mm.
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