daboso　太ぼそ

KEY WORD :　architecture / general terms

Also written 駄ぼそ, 朶ぼそ. Usually abbreviated dabo だぼ. Lit. a fat tenon *hozo ほぞ. A dowel, pin, or peg joggle. A small, thick, square or rectangular piece of hardwood such as zelkova or oak, used to join beams in a traditional style roof truss that are joined at right angle. It fits log beams that have purlins attached on top. By inserting daboso into one half of a beam and cutting notches into the other half to fit the daboso, thick, heavy exceptionally large beams become strong abutting members. Daboso prevents slippage. Dowels are frequently used if necessary in roof framing.

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