Keywords
Architecture
General Terms
Roof framework composed of struts separating three tiers of transverse beams, each proportionately shortened in length than the one below. The central struts on the uppermost beams support the ridge. Example: *Shōsōin 正倉院 (Nara), original structure.

a) sanjūbari 三重梁 b) *nijūbari 二重梁