bird's-mouth


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bird’s-mouth

1. A notch cut across the grain at one end of a timber for its reception on the edge of another piece, such as a wall plate.
2. The angle between two components, usually between 90 and 180 degrees.
References in periodicals archive ?
Then secure the roof panel with a pair of toenails through each bird's-mouth into the top plate of the wall.
The upper rafter ends are cut to 13 degrees (or adjusted to your project) and the lower ends rounded on their bottom edges and notched for bird's-mouths.
Calculating the length, angled end cuts and bird's-mouth cut-outs of the roof rafters takes a healthy dose of trial and error (Photo 7 and Fig.
It's critical that you make the marks shown in Figure B before you cut out the arches; you'll need the straight edge of the board to mark the coves and bird's-mouths (the notches that fit over the beams).