UNIVERSITY INSTITUTE OF ARCHITECTURE
BUILDING MATERIAL AND CONSTRUCTION
UNIT II
TIMBER STAIRCASE
Ar Bhavna Sharma (E17418)
DISCOVER . LEARN . EMPOWER
What is a Staircase ?
A staircase is a set of steps designed to provide vertical
movement between different levels of a building or structure.
Horizontal Portion : Tread
Vertical Rise : Riser
Riser Height : 150mm to 200mm
Tread Depth : 250mm to 300mm
Type of Staircase
A staircase is a set of steps designed to provide vertical
movement between different levels of a building or structure.
Requirements to Design a Staircase
1. The building regulation require that all staircase be guarded on each side by a wall or
balustrade extending atleast 840mm (2.75 foot).
2. The building regulation limits the number of riser in any one flight to 16 and minimum of 3.
3. The angle between the pitch line and floor not to exceed 42 degree.
4. Landing is a Platform between two flights provided to serve rest and to make effective provision
for turning a staircase.
5. Good light and ventilation should be available.
Components of Staircase
Requirements to Design a Staircase
Bluster – vertical member which is fixed
between stairway and horizontal to provide
to support the handrail.
Balustrade – the combined framework of
bluster and handrail.
String – the inclined manner of stairs which
supports the end of steps.
Flight – unbroken series of steps between
the landing.
Handrail – inclined rail over the string.
Generally, it is molded.
Nosing – projection parts of tread behind
the face of the riser.
Landing – horizontal platform between two
flights of stairs.
Components of Staircase
Requirements to Design a Staircase
Headroom : height measured from the line
of nosing to the lower outer edge apron.
An apron piece is a beam that supports a
landing.
Nosing – projection parts of tread behind
the face of the riser.
Riser – a vertical member of the step which
connects to treads.
Run – length of stairs in a horizontal plane
which includes the length of landing.
Scotia – an additional finish provided to
noising to improve the elevation.
• Thickness of tread should not be less than 32mm.
• Riser is usually at 25mm
Types of Staircase & Terminolgies
Types of Staircase & Terminolgies
Types of Staircase & Terminolgies
Wedges are
They provide a secure typically inserted
connection between the into specially cut
different components of a slots within the
staircase, preventing stringers, while
movement and squeaking glue blocks are
over time. glued to the front
edge of the tread
where it meets
the riser.
String Details
Thank You
