WHAT IS STAIRCASE? TECHNICAL TERMS USED IN STAIRCASE.

A stair is a sequence of steps provided to afford the means of ascent and descent between the floors and landing. The apartment or room of a building in which stair is located, is known as a staircase and the opening or space occupied by the stair is known as stairway.

Following are the common technical terms used in connection with stairs :

  1. Tread : Horizontal upper part of a step on which foot is placed in ascending or descending a stairway is called tread.
  2. Riser : A vertical portion of a step providing a support to the tread is called riser.
  3. Flier : A straight step having a parallel width of tread is called flier.
  4. Flight : An unbroken series of steps between two landing is called flight.
  5. Landing : A horizontal platform at the top or bottom of a flight between the floors is called landing. It facilitates change of direction and provides an opportunity for taking rest during the use of the stair.
  6. Rise :The vertical distance between two successive tread faces is called rise.  
  7. Going : The horizontal distance between two successive riser faces is called going.
  8. Nosing : The projecting part of tread beyond the face of riser is called nosing.
  9. Scotia : A moulding provided under the nosing to beautify the elevation of step, and to provide strength to nosing is called scotia.
  10. Soffit : The under surface of stair is called soffit.
  11. Pitch or slope : The angle which the line of nosing of the stair makes with the horizontal is called pitch or slope.
  12. strings or stringers : The sloping members which supports the steps in stair are called strings or stringers.
  13. Hand rail : The horizontal or inclined support provided at a convenient height is called hand rail.
  14. Newel post : The vertical member placed at the ends of flights connecting the ends of strings and hand rails is called newel post.

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