Staircase Types of Stairs Staircase types Stairs in Civil Engineering Advantages of stairs Disadvantages of stairs Uses of stairs

1. Staircase:
A Staircase is a series of steps with or without landingsor platforms,
which is installed between two or more floorsof a building to bridge a large
vertical distance.
Types of Stairs:
Stairsare generally divided into 3 types:
1. Straightstairs
2. Turning stairs
3. Continuousstairs
1. Straightstair: A type of stair in which there is no change of direction in any
flight is called as straightstair.
It may or may not consist of a center landing.
Advantages:
- Easiest to build and walk.
-They are only connected atthe both endsso no
intermediate supporting structure is needed.
Disadvantages:
-Use big amountof linearspace.
-These stairs do not provide privacy between 2
floors.
Uses:
 Where there is more free linearspace.
 Commercial Buildings
Straight stair with Landing

2. 2.TurningStairs:
(i). QuarterTurn stair (L-shaped stair):
A stair which turnsat right angle (90”) is called as quarter turn stair.
Change in direction is provided by a landing or with the help of winders.
Advantages:
-Provide Visual barriersbetween floors.
-Safer than straightstairs because number of treadsbefore a landing is reduced
on which a person may fall.
Disadvantages:
-A bit difficult to build and expensive.
-Construction of handrailfor these stairs require more skill.
With Landing With Winders

3. (ii). Half Turn stair (U-shaped stair):
U Shaped stairs are basically 2 parallelflights of straightstairs joined by a landing
that requiresa 180-degree turn in the walk line. If a third flight is inserted into the
middle of the stairs, it would become a double L stair (or quarter landing).
Advantages:
-Landing providesa resting pointwhile covering steps.
-It fits best in architecturalplans
Disadvantages:
-Difficultto build
-Requiresmore skill

4. (iii).Threequartertrun stairs:
A stair turning through 270 degrees, iscalled as three-quarter turn stair.
It consists of two landingsor turns.
(iv).Bifurcated Stairs:
This type of stair is designed in such a way
that it hasa wide flight in the beginning
which is further divided into two narrow
flights at the mid endings, on each side.
Uses:
Used in Public buildingsat the entrance.

5. 3.ContinuousStairs:
(i). Circular stairs:
A circular stair is a type of stairway thatoccupiesa circular volume and layersthe
stair treadsin a spiral pattern abouta central supportpost.
Advantages:
Aesthetically appealing.
Disadvantages:
-Difficultto build
-Occupiesgreater space
(ii).Spiralstairs:
A type of round stair or curved stairs that consists of individual steps, or treads,
that are connected to a center column. The treadsrotate around thiscentral point
Plan of continuous stairs

6. Advantages:
-One of the key advantagesof spiral stairs is their
compactness
-Spiralstairs can be attractive and there are many
variationson railingsstyles which can have a
major impacton the overall appearance of the
stair.
Disadvantages:
-Spiralstairs are more difficult to navigate than
other types of stairs-It is difficult to carry large itemsup spiralstairs.
Only one person can go up or down the stairs at the same time.