This is closely connected with the last class of joint, and in fact notching and halving, in some instances, are almost synonymous terms, save that surfaces of halving joints are made flush with one another, whereas in notching, the part taken out to form the joint is often only a very small proportion of the depth of the piece of wood. Such joints are largely used in connection with flooring-joists, roofing, and framing of many sorts. Figs. 13, 14, and 15 show different methods, as used for joists and wall plates, purlins and rafters, etc. Fig. 16 is called dovetail notching, and Fig. 17 Tredgold's notch. As the manipulation of the tools, both while drawing in and making these joints, is identical with the corresponding process in halving, further detail is uncalled for.