The focal point of todays video is to highlight the basics of layout and folding of just a basic rectangular duct. It's not rocket science, its just a little thought and a pair of tin snips. Well....you need a few pieces of machinery too. Once you learn how much to allow for the various folds or machines, basically those dimensions are merely added to the dimensions of the required duct during the process of the layout procedure. #fabrication, #sheetmetal, #ductwork