koshikake aritsugi　腰掛蟻継

KEY WORD :　architecture / joints

A half-lap, dovetailed joint. Also shikimen aritsugi 敷面蟻継, shikimen arihozotsugi 敷面蟻ほぞ継, koshikake arihozotsugi 腰掛蟻ほぞ継, shikimen koshikake aritsugi 敷面腰掛蟻継; koshikake arikake 腰掛蟻掛. An end joint which combines two joints: a half-lap and a dovetail. The dovetail mortise and the bench, or seat, of the lap joint are cut so that the mortise occupies about half the thickness of the timber. The bench made from the remaining half extends like a step beyond the mortise. The second timber　contains the dovetail tenon; the undercut overlaps the bench when the dovetail tenon is dropped into place in the corresponding mortise. If a half-blind mortise, mechigai hozoana 目違ほぞ穴, is cut vertically into the center of the bench and a matching tenon is made on the undercut part beneath the dovetail, it is called *koshiire mechigaitsuki aritsugi 腰入目違付蟻継. The half blind tenon prevents damage from twisting forces.

*koshikake 腰掛 =*shikimen 敷面

REFERENCES:

*mechigaitsugi 目違継

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NOTES:

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