I've got a question for you guys you seem to know your stuff with the demo work. I read through the the different threads and haven't seen any talk of how you guys figure normal house wood debrie. I know alot of you guys work on big commercial and industrial demo projects. I do alot more excavating work then demo work, but here lately I've been doing more and more. Most of my projects are simple garage and house demo jobs. I can figure concrete no problem, but the wood debrie I have been kind of shooting from the hip and comparing from past jobs, and knock on wood been working out. But I know there's got to be a more precise formula that works. Somebody told me you take the SF and mutiple by something, and then add for 2nd story and other things, but I don't remember the exact formula. Anybody have any good ways of figuring, just curious before it bites me in the but someday.