1. The problem statement, all variables and given/known data The problem and cross section are attached. (#2 on the PDF) I have to find the length of b if the shear center is at point O. The horizontal lines that are not labeled are of length a. 3. The attempt at a solution I took the Moment about O to get the equation for e. I have split the cross section into 3 different sections, used tau=VQ/IT Took the integral of tau to get V of the particular section. I then found I total. All of these values are respect to t,b, and a. After I've done all this, do I set the e=0 and solve the equation for b in terms of a and t? I am not sure if I am doing this right. Will post the work I've done if necessary. Thanks!