Also mizunuki 水貫. The penetrating beams that join and secure the floor studs *yukazuka 床束, which in turn support floor joists *neda 根太. Shibarinuki are found above tie beams called negaraminuki 根がらみ貫 which penetrate the lowest part of the floor studs.
a) shibarinuki 縛貫 b) *neda 根太 c) *yukazuka 床束