koshikake-kamatsugi Low-poly 3D model

OverviewUsed for foundations, beams, crosspieces, main rafters, and ridge beams. It features a sickle-shaped tenon and a groove carved in the opposite direction, serving as a joint that is incorporated as a seat.

PrecautionsCompared to the koshikake-aritsugi, it has a larger fiber direction cross-sectional area, resulting in greater tensile strength. However, do not use it in places where sudden pulling forces are applied. Bending resistance cannot be expected. When used for the foundation, similar to the aritsugi, the side closer to the pillar is considered the male wood. During construction, a sliding gradient should be applied.