Question: what are the names of the parts of a staircase?
Answer: Step. The step is composed of the tread and riser., Tread. The part of the stairway that is stepped on. ... , Riser. The vertical portion between each tread on the stair. ... , Nosing. ... , Starting step or Bullnose. ... , Stringer, Stringer board or sometimes just String. ... , Winders. ... , Trim.