Hello, I am trying to figure out how to determine how much a simple steel plate will bend with "x" amount of weight on it. I have searched the internet looking for some good descriptive information for my studies and am having a hard time figuring it out. I understand that it is probably complicated, but if someone could please give me an equation and "dumb" it down for me i would be very appreciative. Say i had a 2x4 across 2 chairs and set a 30lb box on it. How much would it bend?? Please don't just answer the problem, i do not care what the answer is, i just am curious how to get it. Thank you very much for your help again guys!!!