a V shaped notch in a timber.
An alternative to a birdsmouth cut in carpentry is using metal hangers or brackets to support the rafters instead of cutting notches into them.
A plumb cut is a type of cut made in carpentry, typically used for fitting roof rafters or other angled cuts where a vertical reference is needed. It allows the rafter to sit flush against the wall or another surface, ensuring proper alignment and support. This cut is often used in conjunction with a birdsmouth cut, which helps in securing the rafter to the top plate of a wall. Overall, the plumb cut is essential for maintaining structural integrity in roofing and framing.