相欠き(あいがき-合欠)とは?【建築用語・土木用語・大工用語】 相欠きとは、二つの木材を半分ずつ切り欠いて、重ね合わせることをいいます。相欠きのことをあいじゃくり (合決り・相決り) ともいいます。 Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window