kouryou taiheizuka 虹梁大瓶束
KEY WORD : architecture / general terms
A structural framework in the gable ends of a roof characterized by the use of bottle struts *taiheizuka 大瓶束, a structural technique which began to appear in about the 13c. in place of frog-leg struts *kaerumata 蟇股. The framework employs an arrangement of rainbow beams *kouryou 虹梁 supported at their ends by 3-on-1 bracket complexes *mitsudo tokyou 三斗斗きょう, the apex of which carry a bottle strut with a bearing block and bracket arm *tokyou 斗きょう which in turn carry the ridge *munagi 棟木, end. This is the simplest arrangement. These structural elements are visible in the gable pediments and display a splendid decorative sensibility. If two rainbow beams are used, the upper one is shorter and supported at each end by a bottle strut and bracket complex. Another bottle strut with a bracket complex is added to the center of the upper rainbow beam to support the ridge end. The entire structure is then called nijuukouryou taiheizuka 二重虹梁大瓶束.

a) *taiheizuka 大瓶束 b) *kouryou 虹梁

*kouryou kaerumata 虹梁蟇股

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