Kama Tsugi
A sickle-shaped lap joint that locks beams together with graceful compression, favoring tea house transoms.
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Joint profile
Kanawa Tsugi 金輪継ぎ
A scarf joint reinforced with a metal collar to resist bending and seismic stress. Revered in temple restoration.
Assembly insights
Kanawa Tsugi traces its roots to Heian-period temple complexes. The joint's interlocking geometry distributes loads across shoulders while the metal hoop prevents separation during earthquakes.
Applications
- Temple roof beams
- Bridge restoration
- Heritage carpentry