Return Nosing
Narrow mitered side edge of an open tread
Riser Bracket
Thin decorative scrollwork mitered to the open end of a riser and attached to the face of an open stringer
Scotia Moulding
Trim piece attached to the underside of tread nosing projection
Center Carriage
Support stringer attached to the middle of wide stairs to promote extra stability
Rise
Can refer to either the overall elevation from one floor to another or an individual vertical height from one tread to the next
Run
Can refer to either the overall horizontal length of a stair or the individual depth of a single tread (rough cut)
Glue Blocks/Wedges
Blocking glued and nailed to the underside of a stair to prevent squeaks
Finish Nail and Sand
Smooth outside face of and exposed box stringer
Bowed Step
Extended depth, curved front tread and riser
Headroom
The vertical space allowed for ascent or descent of a stair as it passes beyond the well opening. Code requires 6’ –8” (80”)
