15 Different Parts of staircase

The stair provides quick and easy access to one floor to another floor of the house. You must know the basic parts of a staircase before constructing it. Staircase, n the houses increase the aesthetic appearances by from making it more functional.

In the stairs, different parts of the stairs are used having a different function. The all-important technical terms used in the connection of the stairs are,




1: Baluster:

The baluster is a vertical member of metal or wood and supporting a handrail.

  • It is also called spindle.
  • It is mainly made up of plastic, steel, wood and some times with stones.
  • The baluster is supporting the handrail or the caping of a  parapet of the staircase.

parts of a staircase

2: Handrail:

The inclined rail over the string is termed as a handrail.

  • It provides stability and support.
  • It is mainly used in descending and ascending staircases.
  • According to the OSHA, the minimum height of handrail must be 30″(76 cm) and not more than 37″(94 cm).
  • Handrails are mainly supported with the help of posts or walls.

parts of a staircase (hand rail)



3: Soffit:

The soffit is the underside of the stair or bottom of the stair slab.

  • Under the surface of the stair called soffit.
  •  Some times it is invisible due to the under-stair construction of store or Bath.
  • It is either finished with plaster or may be covered with the ceiling.

parts of a staircase soffit

4: Waist:

The waist is the thickness of the structural slab of RCC stair.

  • In this waist the steps rest.
  • It is made up of RCC or wood
  • The waist is the minimum thickness perpendicular to the soffit of the staircase
  • The steps on the waist are may be made up of brick, wood or concrete.

parts of a staircase waist

5: Nosing:

Nosing is the part of the tread beyond the face of the riser and it is usually to give good architectural shape.

  • It is projected to increase trade foot space.
  • It end is usually in the rounded shape.
  • The nosing length is not more than 1.5″.

parts of stair nosing

6: Riser:

The riser is the vertical distance between the two tread faces. According to Nptel,

  • In public buildings, we mainly use the rise 150mm.
  • In residential buildings, we use 190 mm mainly.

parts of a staircase rise


7: Tread:

Tread is the upper horizontal portion of a step which the feet is placed. The trade is the most important parts of stairs.

  • The top portion of the step called tread.
  • The trade length is mainly used 270 mm in residential buildings.
  • 300 mm tread length is used for the public buildings.

8: Step:

The 1 trade and 1 rise make a complect 1 step and it is the important part of a stairrcase.

  • The step area depends on the rise and tread we want to provide.
  • It is may be made up of brick, concrete or wood.

parts of a staircase

9: Flight:

Flight is a series of steps without any break or landing.

  • It is made up of many steps.
  • In one flight 8 to 10 or may in some places 12 to 15 steps, we constructed (According to Quora community).
  • It is made up of wood or RCC.

10: Landing:

Landing is the platform at the top or bottom of a flight between the floors.

  • Landing is present in the two excessive flights.
  • It is also known as resting position in the stairs.
  • We also provide to change the direction of the flights.

staircase landing


11: Run:

It is the total length of stairs in the horizontal plane.

  • The length of landing length is included in the run.
  • It is also calculated by adding the trade lengths and landing length (if provided).
  • It is a horizontal distance of the stair.

12: Going:

The horizontal distance between the first and last riser.

  • It is the width of the tread between two successive risers.
  • It is measured from stair nosing to nosing.

parts of stairs going

13: Pitch line:

The line connecting the nosing of all treads in a flight of stairs.

  • It is an imaginary line along the nosing tip of the treads.
  • The pitch slop is measured with angles (tangent)
  • The horizontal line angle is measured in degrees.

14: Pitch:

The angle between the pitch line and horizontal called pitch.

  • Pitch also called rake.
  • Its angle is measured with the degree.

15: Blocking:

Blocking supports the underside of the steps.

  • It is mainly provided in wood steps.
  • It provides additional support to the step.

These parts of a staircase may pronounce differently in different languages.

IMPORTANT POINT:

The Headroom is not less than 2 meters vertically above the pitch line.

Read Also:

  1. Cutting length of the rectangular stirrup.

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