It was determined that the half the lumber was used for thresholds and kamoi, quarter lumber for taruki (the simplest type of rafter extended from the ridge to the end of, or beyond the eave), sixth of the lumber for yose-shikii (a single grooved track (threshold) for sliding doors, opaque sliding screens or a translucent sliding screen) and kamoi, and duodecimal lumber for furring strips of waist panel and saobuchi (a wooden strip nailed horizontally to a board of ceiling).
基準木材の二つ割りを敷居・鴨居に、四つ割りを垂木に、六つ割りを寄せ敷居や鴨居、十二割りを腰の胴縁や天井の棹縁に用いるなどと定められていた。