What are the Requirements for the Construction of a Good Staircase?
A series of steps and affords that is ascent and descent make the stair. Staircase is the enclosed room in which stair is located. Stairway is the opening space occupied by the stair.
Stair is made of a number of connected elements such as treads, risers, stringers and balusters. Stairs can be made of concrete, steel, bricks, stone, timber or reinforced cement concrete. Given below are the list of requirements needed for stair:
Location: Your staircase must be centrally located to be accessible from any part of the building.
Width of stairs: 1.8m or 90 cm is the average width of a stair for residential buildings or for the use of public.
Length of flight: A maximum of 12 and a minimum of 3 flights of steps must be made mandatory.
Pitch of the stair: The slope of stair must not be more than 40◦ and less than 25◦.
Headroom: A minimum of 2.14m of headroom above the flight must be built.
Material: The material must be durable are strong. It must also possess fire-resisting qualities.
Landing: The width of landing must always be greater than the width of stair.
Step-proportions: Uniformity must be maintained in each rise and trend of a stair.
Riser height: The desired height of a riser must not be more than 20cm.
Handrails: Handrails must be provided.
Winder: construction of winder steps must be avoided.
Proportion of trade and riser:
(going in cm) + (2* rise in cm) = 60
(Going in cm) + (rise in cm) = 400 to 410 approx.
Take into consideration the standard going and rise size as 30 cm to 14cm and for each deduced sum of going as 25mm and 12mm to 13mm to rise.
Results practically considered of stair construction:
Residential building: 25cm * 16cm
Public building: 27cm * 15cm to 30 cm to 13cm