A tension leaf is created by dividing the beam height by eight. The narrower part remains only 3/8. The slopes are created with a 30 degree inclination. If loads press on the connection from above, small tensile loads can be transferred. Since the simple tension leaf is not additionally secured, it must be secured with clamps or cotter pins. Shear forces can also be transmitted via the diagonally joined leaf. The simple design of the tension leaf makes it one of the oldest connections used by carpenters (cf. Gerner, 1992, p. 83).

Leaf joints
Similar to tenons, leaf joints are used for longitudinal, corner, transverse, circular and oblique joints, whereby the timbers to be joined lie flush with each other with recesses, cross each other or are cross-laminated (cf. Gerner, 1992, p. 76). The joint finds its origin in joints of intersecting round timbers. In order to achieve a firm fit of this joint, the crossing surfaces of the timbers are worked flat. Later, the timbers are cut to half their thickness and the resulting recesses are joined together (cf. Gerner, 1992, p. 76).

Butt joints
Butt joints are, next to all support joints, the earliest forms of joints used. Butt joints mean that timbers are extended across corners or in one direction. Such joints are necessary in all inclined as well as horizontal components (cf. Gerner, 1992, p. 42).Further butt joints are often divided into the major joint types of tenons, leaves or dovetails. Furthermore, according to the required functions, compression, tension, lateral shear or shear forces can be absorbed, formed in a position-safe manner or secured against lifting. Thus, joints are classified in the large groups of joints as their own type of joint (cf. Gerner, 1992, p. 42).