DuckCorp Dico

Found one definition

1.                 From Japanese-English FreeDict Dictionary ver. 0.1:
                   
   
   
                   
                     
   卯建 /(en)tʃˈaɪniːz(ja)lˈe̞tə (en)tʃˈaɪniːz(ja)lˈe̞tə/, 宇立 /(en)tʃˈaɪniːz(ja)lˈe̞tə (en)tʃˈaɪniːz(ja)lˈe̞tə/,  (word containing out-dated kanji)  梲 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, うだつ /ɯᵝdˈätsɯᵝ/
   (noun (common) (futsuumeishi))
   うだつが上がらない
            Note: word usually written using kana aloneshort pillar set on a beam to support a ridgepole