Staircase Structural Drawing

1. Width of Stair: It should not be less than 1.00m.
2. Length of 䕅ight: The number of steps in a single 䕅ight should not be more than 12.
3. Pitch of the stair: It should be between 25o to 40o
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. Following proportions are recommended:
(i) Residential buildings-Tread=250 mm Rise=160 mm
(ii) Public buildings – Tread=300 mm Rise=150 mm
(iii) Industrial buildings, Railway station, etc tread=not less then 250 mm =250 to 300 mm Rise=not less then 150 mm =150 to 190 mm
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