What is the easiest way to determine the two force member in a frame question? When I look at a frame and see the pinned connections, I automatically assume that there is a reaction in the x and y directions. How can I tell at which pin there is only one reaction, and what direction it is in? All of the examples in my textbook state which member is the two force member and wether it is a pulling horizontally or vertically on the pin, whereas the problems do not give this information. Thanks.