shear stress, what is a flat tie bar....? 1. The problem statement, all variables and given/known data two lengths of flat tie bar are connected together by a lap riveted joint with three rivets each 10mm in diameter. Calculate the maximum pull that can be applied to the tie-bars if the shear stress in the rivets is not to exceed 60MN/m^2 3. The attempt at a solution i can't attempt this because i don't know that a flat tie bar is or what it would look like if they were connected together by a lap riveted joint with three rivets... does anyone know what it is?