This presentation given an overview of Staircases and its types.

1. Rohan Dasgupta
Staircase

2. Staircase is a construction designed to bridge a large vertical distance by dividing it into
smaller vertical distances, called steps.

3. Types of Staircase: 1. STRAIGHT STAIRCASE
The straight staircase is the simplest staircase design.
There are two types:
1. Straight
2. Straight with landing
They’re the easiest type of stairs to ascend and descend
as well as build.
They’re quite plain and don’t offer a grand design.
With respect to footprint, it falls in the middle as to how
much footprint it takes up in the home.

4. Types of Staircase: 2. QUARTER TURN STAIRCASE
The quarter-turn staircase is one where it turns 90°
at some point.
The “quarter” refers to the degree of turn.
This type of staircase is great for certain types of
home layouts such as one with a foyer where the
door is in from the wall sufficient enough to fit in
part of the stairs.
It’s more interesting in design than a straight
design and the turn means there will almost
always be a small landing part way up.

5. Types of Staircase: 3. HALF TURN STAIRCASE or DOG LEGGED STAIRCASE
The quarter-turn staircase is one where it turns
180° at the mid-landing.
The “half” refers to the degree of turn.
This is a very popular design because it’s a decent
space-saver by doubling up.
It’s also a fairly simple style to build.
The downside to this is it’s not all that grand of a
staircase.

6. Types of Staircase: 4. THREE QUARTER TURN STAIRCASE
The quarter-turn staircase is one where it turns 90°
at each of its 3 landings.
The “three quarter” refers to the degree of turn.
It is an elaborate design.
Quite a bit of space is required to build such a
design.
It is usually in homes with above-average ceiling
height.

7. Types of Staircase: 5. CIRCULAR STAIRCASE
- top view is circular in shape.
- used for taller ceilings.

8. Types of Staircase: 6. SPIRAL STAIRCASE
- steps are attached radially to a central pole
- usually made of metal
- used predominantly where vertical height to be
covered is much more compared to the
horizontal space available.
- for eg. in watch towers, storage silos, water
tanks etc.
- not easy to ascend or descend.

9. Types of Staircase: 7. BIFURCATED STAIRCASE
- central straight stair gets bifurcated to two
straight stairs at 90° at the mid-landing in
opposite directions
- takes up the most space
- luxurious staircase; used mostly for grand
entrances

10. Parts of Staircase:

11. Bye-Laws for Staircase:
- Minimum tread = 300 mm
- Maximum riser = 150 mm
- Maximum number of risers per flight = 12
- Minimum headroom = 2.2 m
- Minimum width of one stair = 1 m
- Minimum width of mid-landing >= width of one stair
Ref: Clauses 12.4.1. and 12.4.2. of NBC of India 2016 (Vol. 1, Part 3) pg. 44

12. Q. Design and draw a dog-legged staircase for a floor to floor height of 3 m.
Floor to floor height = 3000 mm
∴ floor to mid-landing height = 3000/2 mm = 1500 mm
Assume height of one riser = 150 mm
∴ total number of risers in one flight of stair = 1500/150 mm = 10
(< 12; therefore okay)
∴ total number of treads in one flight of stair = (10 - 1) = 9
Assume width of one tread = 300 mm
Assume width of one stair = 1500 mm
Assume width of mid-landing = 1500 mm

13. Thank you
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- Rohan Dasgupta
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