Technical Terms in Stairs | Building Construction

Technical Terms in Stairs

 

The definitions of technical terms used in the connection with the stairs are as follows :

 

1) Tread :

• The horizontal upper portion of a step is known as a tread.
  

  

2) Rise :

• This is the vertical distance between two successive treads.
  

  

3) Riser :

• The vertical or front member of the step, which is connected to the treads, is known as a riser.
  

  

4) Step :

• A combination of tread & riser is known as a step.

 

 
• Following are the common types of step:

1. Bullnose Step
2. Commode Step
3. Dancing or Balancing Step
4. Flier
5. Round-ended Step
6. Splayed Step
7. Winder

5) String :

• The inclined member of a stair which supports the ends of steps is known as a string.

• There are two types of string:
  

  a)A cut or open string

  b)A closed or housed string.

  
  

6) Handrail :

• The inclined rail over the string is known as a handrail.
  

  

7) Baluster :

• This is the vertical member which is fixed between string & handrail to give support  to the handrail.
  

  
  

8) Balustrade or Barrister :

• The combined framework of handrail & balusters is known as the balustrade or barrister.
  

 9) Flight :

• This is defined as an unbroken series of steps between the landings.
  

  

  
  

10) Going :

• This is the horizontal distance between the faces of two consecutive risers.
  

  

11 ) Headroom :

• The vertical distance between the nosings of one flight & the bottom of flight immediately above is known as the headroom.
  

  

  
  

12) Landing :

• The horizontal platform between two flights of a stairs is known as the landing.
  

  

  
  

13) Newel Post :

• This is the vertical member which is placed at the ends of flights to connect the ends of strings & handrails.
  

  

  
  

14) Nosing :

• The projecting part of the tread beyond the face of riser is known as a nosing.

15) Pitch :

• The angle of inclination of the stair with the floor is known as a pitch.

16) Run :

• The total length of a stair in a horizontal plane is known as the run & it includes the lengths of landings also.

17) Scotia :

• This is an additional finish or moulding provided to the nosing or tread to improve the elevation of the step & to provide strength to the nosing.
  

  

  
  

  
  

18) Soffit :

• The under surface of a stair is known as the soffit.
  

  

  
  

19) Waist :

• The thickness of structural slab in case of an R.C.C. stair is known as a waist.

20) Walking Line :

• The approximate line of movement of people on a stair during ascending or descending is known as a walking line.
  

  

  
  

 

 

To know detailed information about technical terms in staircase click on the video given below :