stairs,building drawing
TRANSCRIPT
Er.Roshan Kr. Chaudhary
Faculty of construction engineering
R.A.G.C, Thane
Stairs
Terminologies
1.Baluster:The vertical member fixed between
string and hand rail.
Terminologies
Balustrades-The combined frame work of
baluster and hand rails.
Flights : Unbroken series of steps between
landing.
Terminologies
Hand rail: it is inclined rail ,provided over the
stings.
Head Room: vertical distance between nosing of
one flight and bottom of flight above it.
Terminology
Landing : The horizontal Platform between 2
flights.
Terminologies
Newel post: Vertical member at the ends of the
flight.
Terminologies
Nosing : Projected part of the tread beyond the
Riser.
Terminologies
Pitch:
Terminologies
Riser: The vertical front member of a step.
Tread: The horizontal upper portion of the tread.
Winders: special type of steps which are used in
place of landing
FOR DESIGNING YOU MUST KNOW Pitch:25-40 degree
Standard size of tread and riser:
Type of building Tread Riser
Residential
building
25 16
Commercial
building
27 15-16
factories 18 25
Different types of stairs:
Straight flight stair
Dog legged stair
Quarter turn and half turn stair
Spiral stair
Circular stair
Bifurcated stair
Open newel stair
Geometrical stair
Straight flight stair
Dog legged stair
Flights run in opposite direction and there is no
space between the two flights in plan.
Quarter turn and half turn stair. Stair turning through 90 degree.
Spiral stair
A Type of circular stair with a vertical column in
centre.
Circular stair
Circular in plan , winders are used in instead of
landing.
Bifurcated stair
Quarter turn stair with two branches divided after
landing.
Open newel stair
Similar to dog legged stair but there is some gap
between two flights.
Geometrical stair
Similar to open stair but two flights are connected
by each other by means curved winders instead
of landing.