The meaning of BIRD'S-MOUTH is an interior angle of notch cut across the end of a piece of timber to receive the edge of another piece.

bird's mouth in American English noun. Carpentry. a right-angled notch cut in the underside of a rafter for fitting over a longitudinal member, as a wall plate.

A birdsmouth joint or bird's beak cut is a woodworking joint that is generally used to connect a roof rafter to the top plate of a supporting wall.

6 дней назад · Bird's mouth definition: a right-angled notch cut in the underside of a rafter for fitting over a longitudinal member, as a wall plate.

A birdsmouth is a notch cut into the underside of a roof rafter to enable it to sit tightly and securely on the timber wallplate that runs across the top of a ...

There is one meaning in OED's entry for the noun bird's mouth. See 'Meaning & use' for definition, usage, and quotation evidence.

The term birds mouth is used, due to the rafter's appearance, similar to a bird's mouth. The rafter must be cut to sit evenly on the top of the horizontal plate ...

(B) The notch is called a bird's-mouth. Without a bird's-mouth, the rafter would be resting only on the edge of the top plate.

Bird's mouth definition: a right-angled notch cut in the underside of a rafter for fitting over a longitudinal member, as a wall plate.

Bird-s-mouth definition: (architecture) An interior angle or notch cut across a piece of timber, for the reception of the edge of another, such as that in a ...