1. The problem statement, all variables and given/known data http://i.imgur.com/VFb5rwj.png 2. Relevant equations 3. The attempt at a solution First, I drew the FBD for the system, one horizontal force at A, one force perpendicular to the beam at B, and the weight. Writing out the equilibrium equations: The sum of forces in the y direction should be 0, so I have the equation: Nb cos(θ) - W = 0, which can be rearranged for Nb later on. Then I took the moment about point A: Nb (a/cosθ) - Wcosθ (L/2) = 0 Eventually, it simplifies out to cos^-1 ( (2a/L) ^(1/3) ) = θ I don't think I got the right answer, but can someone help me identify my error? Thank you in advance.