It is used in heavy truss work.
_No.68.A bridle joint_, Fig.

269, is an oblique joint in which a bridle or "tongue" is left in an oblique notch cut out of one beam.
Over this tongue is fitted a grooved socket cut obliquely in the other beam.

It is used in truss construction.
_No.69.A bird's mouth joint_, Fig.

269, is an angular notch cut in a timber to allow it to fit snugly over the member on which it rests.

It is used in rafters where they fit over the plate.
_No.70.A plain or rubbed or squeezed or glue joint_, Fig.