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What is the strength of weldper mm length used to connect two plates of 10mm thickness using a lap joint?(a) 795.36 N/mm(b) 295.5N/mm(c) 552.6 N/mm(d) 487.93 N/mmI got this question in an international level competition.This is a very interesting question from Design of Welds topic in division Welded Connections of Design of Steel Structures

Answer»

The correct CHOICE is (a) 795.36 N/mm

Easy explanation: 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 [fu/(√3 x 1.25)] = 410 x 4.2 /(√3 x 1.25) = 795.36 N/mm.



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