Question

A 12 mm thick angle member is connected to a 16 mm thick gusset plate as a strut in a roof truss. Minimum and maximum strength of fillet weld is ensured respectively.The minimum size of fillet weld is_____ mm and maximum size of fillet weld is______ mm.

• A. 3 & 10.5
• B. 3 & 9
• C. 5 & 9
• D. 5 & 10.5

Answer 1

The correct option is C 5 & 9

Minimum size of fillet weld depends on,

• Thickness of thicker connected member {maximum of thickness of gusset plate, (16 mm) and thickness of angle section (12 mm) }is 16 mm.

Hence minimum size of fillet weld is 5 mm

Maximum size of fillet weld (for round edges) is $\frac{3}{4}$ times thickness of round edge at toe.
$\therefore S_{\text{max}}=\frac{3}{4}\times 12=9mm$
$\therefore$ Hence maximum size of fillet weld is 9 mm