1
short pillar set on a beam to support a ridgepole
See also:
うだつが上がらない (うだつがあがらない)
2
mud wall with raised roof edge (as a fire wall and status symbol);raised roof edge
Other forms
梲 【うだつ】 (rarely used kanji form) · 卯立 【うだつ】 (search-only kanji form) · 宇立 【うだつ】 (search-only kanji form)