Hey folks, I'm rather stuck. I have a complete mental blank on this question. Having the force couple first has confused me I think 1. The problem statement, all variables and given/known data Compute the forece supported by the pin at C for the frame subjected to the 400-N.m couple 2. Relevant equations [PLAIN]http://sphotos.ak.fbcdn.net/hphotos-ak-snc3/hs549.snc3/30037_407472593600_532198600_4297857_5544101_n.jpg [Broken] 3. The attempt at a solution No idea where to begin!