With reference to the following figure, a plate, 75mm wide and 10mm thick, is joined with another plate as shown. The permissible tensile and shear stress in the welds are 50/mm² and 40N/mm². Determine the required length of each parallel fillet weld if length of transverse weld is 40mm.
a) 11mm
b) 9mm
c) 8mm
d) 7mm
Answer: a
Explanation: 0.707hl₁σ+1.414hl₂τ=20000 or 0.707x10x50x40+1.414x10xl₂x40=20000.
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