Two plates are joined by double strap butt joints with rivets arrangement as shown in the figure. Width of the plate is 300mm and diameter of rivets 30mm. The thickness of the plates can be taken as 20mm. Allowable stress in tension, shear and compression are 80 N/mm²,60 N/mm² and 160N/mm². If width of plate=80mm and diameter of rivets 10mm, then pitch will be?

Correct Answer: 50mm
p+2m=w or p+2×1.5×10=80.