Also called mitsudogumi 三斗組 or mitsudo-zukuri 三斗造. A 3-on-1 bracket complex. It carries a wall purlin and by distributing the weight of the members above it, lightens the dead load otherwise placed on the pillars. It is non-projecting, and runs parallel to the wall plane. It consists of a large bearing block *daito 大斗, positioned atop a pillar, and carries a bracket arm *hijiki 肘木, to which three small bearing blocks *makito 巻斗, are attached. The end of a rainbow beam extends from the interior to rest upon the large bearing block. The central small bearing block is placed on top of it. The 3-on-1 bracket complex is a basic bracket unit which can be compounded into extremely complex bracket systems.
a) *hiramitsudo 平三斗 b) *demitsudo 出三斗
Kenchōji Hattō 建長寺法堂 (Kanagawa)