suberiotoshi　滑落

KEY WORD :　architecture / general terms

The name of the groove cut several centimeters from the bottom of one of two posts erected on each side of an opening into which a ground sill or threshold must fit. Mortises are made at the base of each post and tenons are made on each end of the sill or threshold. First, the tenon on one end is fitted into the mortise on one of the posts. Then the tenon on the other slips into the the top of the groove. By tapping the member, the tenon will move down the groove until it drops into the mortise beneath.

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