1. The problem statement, all variables and given/known data I am following the first problem on this online pdf: http://www.ce.udel.edu/courses/CIEG212/Homework_1_2007.pdf 2. Relevant equations Equilibrium equations for forces and moments. 3. The attempt at a solution I know how to solve the problem, that part is straight forward. However I can't see how the moment at C due to the load P is going in the clockwise direction as implied by the moment equation. In my mind, it should compliment the counter-clockwise direction due to the horizontal force of the member BD. Is my assumption wrong? If so, why?