types and deatils of different types of stairs used in architecture in detail.

1. STAIRS & ITS TYPES
SHRIYANSHU KUMAR
BARC/15022/13
IIIrd SEMESTER

2. NEED:
• To facilitate access during movements from one level to another
in a building.
Location:
• It should be placed at a central place so as to give shortest access to
all rooms. It should be well ventilated and airy.

3. PRINCIPLES TO BE OBSERVED WHILE PLANNING AND DESIGNING A STAIR
1. Width of Stair: It should not be less than 1.00m.
2. Length of flight: The number of steps in a single flight should not be more than 12.
3. Pitch of the stair: It should be between 25 to 40
4. Width of landing: It should be 150mm, more than the width of stair.
5. Winders or kite steps: Odd shaped steps should be avoided and incase found
necessary. These should be provided at the start of a stair.
6. Han-rails: It should be 750 to 850 mm in height from the top of respective step or
landing.
7. Step proportions: The size of rise and tread in a stair should be kept uniform
through out the whole stair.
8. Headroom: Minimum of 2000mm of clear headroom is required above the pitch line

6. STAIR GEOMETRY
Stair safety and geometry are related- rhythmic
movement along a straight line is important for
safe ascent or descent

7. STAIR STEPS

8. Straight flight stair
Stairways
>600mm between
handrails
Slope not less
than 26.50 & not
more than 450
STAIR TYPE 1

9. STAIR TYPE 2
Straight two-flight stair
with half-landing
stairs constructed in
flights straight or curved
horizontally
Number of rises not to
exceed 18 in a flight;
not more than 36 rises
without a change in
direction

10. STAIR TYPE 3
Quarter-turn stair
with landing
All treads to be slip
resistant, with
provision made for
drainage
(a) Rises & goings
(in the same flight) to
be within ± 5mm

11. STAIR TYPE 4
Dogleg stair with
half-landing
Head clearance min
2000mm vertically
from nosing of tread
Nosing of tread must
be highlighted

12. STAIR TYPE 5
Open-well stair with
two quarter landings
(b) Each rise not less
than 150mm & not
more than 215mm
(c) Each going not
less than 215mm &
not more than 305mm

13. STAIR TYPE 6
Quarter-turn stair with winders
Landings:
(a) Length & width must
be not less than the
stairway
(b) Landing minimum
vertical clearance
2000mm
(c) Every access landing-
standing space at least
600mm clear of cross-
traffic or door swing

14. STAIR TYPE 7
Spiral stair with
central column
Radius to centre line
of stairway not less
than 600mm; where
radius to centre line
is less than 3000mm,
maximum width of
curved stairway
750mm

15. Circular stair with
central well
(c) Each Going
not less than
215mm & not
more than 305mm
STAIR TYPE 8

16. Geometric stair (900)
turn
(d) 45 000< RxG <48
000
(e) Tread width must not
be less than the going
and there must be an
overhang of at least
10mm
STAIR TYPE 9

17. Latest Stair
This section is a showcase of the more recent stairs that are use
nowadays. The combination of glass, timber, stainless steel, wires are being
used widely. The large landing at the bottom of the stair, the combination of
both open and closed risers

18. Contemporary Stair
Contemporary stairs offer the designer opportunities that classic
designs don’t – individuality and design. Contemporary design can be
gloriously simple using clean lines or gracefully curved.

19. Feature Stair
Feature stairs can be either classic or contemporary in design because what
defines them is not so much their style as their prominence and importance to the
interior design as a whole. Feature stairs are a statement, they represent the
designer’s commitment to complete harmony of the space.

20. Curved Stair
Curved staircases that have a highly complex structure, must also meet in-
depth building regulations. It can be a paradox that the staircase must marry perfectly
with the space provided and appear simple and almost effortless when completed.

21. Modern Stair
Modern stairs typically look clean and sleek. They often incorporate material
such as glass and stainless steel and create a focal point for the home. With so many
options now available in stair components and materials, modern stairs allows the
designer to let their imaginations run wild.