udegimon　腕木門
KEY WORD :　architecture / gates
　
Also called *kidomon 木戸門. A simple gate with two main posts either set directly into the ground *hottatebashira 掘立柱, or placed on a base stone, kiso kutsu-ishi 基礎沓石. The ridge is laid across the gate posts and a purlin penetrates the back and front of both posts. More purlins are set on the roof frame to receive the roof itself. A heavy purlin *kabuki 冠木, is set between the pillars and the bracket arms *hijiki 肘木, and secured between them. A bracket arm, usually boat-shaped *funahijiki 舟肘木, is placed transversely on the ends of the purlin. On top of the bracket arm is another transverse member *udegi 腕木, straight on top, with the ends cut straight about half-way and then cut on a curve to the straight-cut bottom side. The eave purlins *gagyou 丸桁, are attached to these udegi by means of cogged joints *watariago 渡腮. Struts *tsuka 束, are placed on the kabuki beam to support the ridge *munagi 棟木. The roof is gabled *kirizuma yane 切妻屋根, and open *keshou yaneura 化粧屋根裏, and the roofing materials vary. To strengthen the single posts and prevent tilting, short secondary posts *hikaebashira 控柱, are set at right angle 30-40cm beyond the main posts. These are attached to the main posts by a diagonal brace *hinuki 飛貫, that extends from the upper part of the secondary posts to their the insertion point with the main posts. Toward the lower ends of the secondary posts, straight members are inserted into the main pillars which are tightened by wedges *kusabi 楔. Plank swinging doors are hung from the main gate pillars.
　


Urakuen Gansuimon 有楽苑含翠門 (Aichi)


　
REFERENCES:
*kido 木戸
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