This video is actually too complex to completely detail in one paragraph. I will, however, give a brief overview of what he’s discussing. In this video he’s describing how to calculate the loads on a frame. A frame is different from a truss due to the fact that it has forces applied on it at places other than the pins. It also has members that are NOT two-force members. By removing each piece and drawing separate free body diagrams, we can figure out the unknowns by isolating each piece and eliminating unknowns one-by-one. He will use another recently revealed technique, the method of sections, to complete the problem in the next video.
This video helps me better understand the topic because he walks me through another problem that is more complex than the examples that we have gone over in class thus far. By showing me a more complex problem, it expands my understanding and helps me prepare for other problems that may be similar. Also it reveals to me a slightly different method than I have learned thus far. It’s always good to learn things in more than one setting and from different sources, as long as the information is valid and correct.