When posts support the handrail from underneath, allowing the handrail to flow uninterrupted throughout the staircase.
Birdsmouth stringers are a design choice that results in the bottom edge of the stair stringer being continued into a ceiling or stair header.
A support post is a way to support a freestanding stair instead of using a big foot.
A big foot is a way of supporting a frestanding stair by vertically extending the stringer to the floor. This creates a wedge-shaped support for the staircase.
Self Supported Stairs & Landing
This type of landing is integrated into the stair stringers eliminating the need for support posts.
A stair notch is a portion of a stair where the stringer jogs around the corner of a wall.