Staircase Structural Design
Staircase Technical Terms:
1. Stair: Steps arrangement of series to communicating in between two floors is known as a stair.
2. Tread: The horizontal member which forms the upper surface of a step is called tread.
3. Riser: It is the vertical front portion of a step.
4. Rise: It is the vertical distance between the two upper surfaces of two successive steps.
5. Nosing: The front edge of a tread is termed as nosing.
6. Line of nosing: Imaginary line joining the nosings and parallel to the slope of the stair is
termed as a line of nosing.
termed as a line of nosing.
7. Flier: A regular and rectangular step is known as a flier.
8. Flight: A series of continuous steps between two floors, or floor to landing or landing to landing is helps
in turning of the stair.
in turning of the stair.
9. Landing: This is a horizontal platform that is provided between two flights to serve as a rest. It also
helps in turning the stair.
helps in turning the stair.
10. Slope or Pitch: The angle between the line of nosing and floor is known as a slope.
11. Strings and stringers: These are inclined members that support the steps. The strings may be provided
on each step or in the center to support steps as a cantilever extending on each side.
on each step or in the center to support steps as a cantilever extending on each side.
12. Soffit or planner: Under the surface of a flight is called the soffit.
13. Balusters: Vertical members that support the handrail are known as balusters.
14. Handrails: Hand rails are provided on top of balusters. It safe guard’s the persons using the stairs. Handrails may be made of wood, masonry, R.C.C., or synthetic materials. It can be fixed even to the walls of
the staircase.
the staircase.
15. Headroom: The vertical distance between the line of nosings and the soffit or landing of a flight
immediately above it is known as headroom. Headroom should not be less than 2.20 meters.
immediately above it is known as headroom. Headroom should not be less than 2.20 meters.
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Staircase Structural Design
Reviewed by Vignesh
on
August 19, 2017
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