2023-04-05 09:57:30
Building constructionStairs A stair is set of steps leading from one floor to the other
The room or enclosure of the building, in which the stair is located is known as staircase
The opening occupied by the stair is known as stairway
TECHNICAL TERMS1. Step : It is a portion of stair which permits ascent or descent. It is comprised of a tread and a riser. A stair is composed of a set of steps.
2. Tread : It is the upper horizontal portion of a step upon which the foot is placed while ascending or descending.
3. Riser : It is the vertical portion of a step providing a support to the tread.
4. Flight : This is defined as an unbroken series of steps between landings.
5. Landing : It is the level platform at the top or bottom of a flight between the floors. A landing facilitates change of direction and provides an opportunity for taking rest during the use of the stair.
6. Rise : It is the vertical distance between two successive tread faces.
7. Going : It is the horizontal distance between two successive riser faces.
8. Nosing : It is the projecting part of the tread beyond the face of the riser. It is usually rounded off from architectural considerations.
9. Scotia : It is a moulding provided under the nosing to improve the elevation of the step, and to provide strength to nosing.
10. Soffit : It is the underside of a stair.
11. Line of nosings : It is an imaginary line parallel to the strings and tangential to the nosings.
12. Pitch or slope : It is the angle which the line of nosing of the stair makes with the horizontal.
13. Strings or stringers : These are the sloping members which supports the steps in a stair. They run along the slope of the stair.
14. Newel post : Newel post is a vertical member which is placed at the end of flights to connect the ends of strings and hand rail.
15. Baluster : It is vertical member of wood or metal, supporting the handrail.
16. Balustrade : It consists of a row of balusters surmounted by a handrail to provide protection for the users of the stair.
17. Hand Rail : It is a rounded or moulded member of wood or metal following generally the contour of the nosing line, and fixed on the top of balusters
18. Head Room : It is the minimum clear vertical distance between and overhead structure (i.e., ceiling etc.).
19. Run : It is the total length of stairs in a horizontal plane, including landing
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