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COMPONENTS OF STAIRS
- Step
- Tread
- Riser
- Rise
- landing
- Nosing
- Going
- Flight
- HeadRoom
- Hand rail
- Baluster
- Balustrade
- Pitch or Slope
- Run
- Soffit:
- Scotia
- Newel-post
- Strings Or Stringers
- Waist
- Line Of nosing
- Walking Line
- Spandrel
1. STEP
The step is a combination of tread and riser which permits access in the vertical direction
2. Tread:
The upper horizontal portion of the step-over which foot is placed during vertical movement in a stairway is known as the tread.
3. Riser:
The vertical member(usually 150mm) of the step is known as a riser. Riser is used to support and connecting successive treads.
4. Rise:
The vertical height between two treads is known as rise.
5. landing:
A horizontal platform (normally plain) between two successive flights of a stair is called a landing. Landing is used as a resting place during vertical movement in a stairway. It provides the change of direction of the flight. Landing which extends for full width of the staircase is known as a half-space landing. Landing extending for only half the width of the staircase is known as a quarter space landing.
6. Nosing:
It is the projecting(2 inches) part of the tread beyond the face of the riser in stair. Nosing is usually rounded which provide a good aesthetic effect to the treads and make the staircase easy for movements.
7. Going:
The horizontal distance between the first step to landing starting portion
8. Flight:
A continuous series of steps without any break between two landing
9. Head Room:
The vertical height between the first step and last step is usually 2.1m in height.
10. Handrail:
The handrail is an inclined rail provided at a suitable height over balustrades. The inclination of the rail is parallel to the slope (waist)of the stair.
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11. Baluster:
It is an individual vertical member made of concrete or steel, timber, metal, or masonry and fixed between string and handrail to provide support for users
12. Balustrade:
Framework made from a series of balusters and handrails is known as balustrade. It is also known as a barrister.
13. Pitch or Slope:
The vertical angle made by the nosing line with respt to horizontal flooring of the stair is known as the pitch or slope of the stair.
14. Run:
The total length of the stair in a horizontal plane including lengths of landings is known as the run of the stair.
15. Soffit:
The under face or bottom of the stair is known as the soffit. It is either finished with plaster or covered with a ceiling. It is the underside of a stair.
CIVIL ENGINEERING JOBS
16. Scotia:
It is a sort of additional moulding provided under the nosing or tread to provide an architecturally aesthetic for the step of elevation.
17. Newel-post:
It is a vertical timber, concrete or steel post provided at the head, foot, or at the point where the balustrade changes its direction. It is also used for supporting the handrail.
18. Strings Or Stringers:
These are the sloping wooden members of a stair, used to support the end of the steps. Stringers may be two types, Cut or open type and closed or housed type. In case of the former type, the upper edge is cut exactly to size to receive the ends of steps. In latter type i.e closed or housed type, the ends of steps are housed into the stringers.
19. Waist:
The thickness of the RCC slab over which steps of RCC rest, is known as waist.
20. Line Of nosing:
It is an imaginary sloping line parallel to the slope of the stair and touching the nosing of all the treads.
21. Walking Line:
It is the approximate line on the stair, adopted by the people during the use of the stair. This line is located about 40 cm from the centre of the handrail.
22. Spandrel:
It is triangular framing under the outside string of an open string stair.
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