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State of West Bengal - Section

Section 80 in West Bengal Municipal (Building) Rules, 2007

80. Minimum Width Provisions.

— (1) The following provisions for minimum width of stairways shall be made :—Table I
Category of Building Height of the Building (in metres) Width of the Stairway (in metres) No. of Stairway
Residential Up to 8.00 1 1
  Above 8.00 and Up to 11.00 1.2 1
  Above 11.00 and Up to 14.50 1.35 1
  Above 14.50 and Up to 18.00 1.25 2
  Above 18.00 and Up to 24.00 1.25 2
  Above 24.00 and Up to 36.00 1.25 2
  Above 36.00 1.5 2
(2)For residential buildings of height above 14.5 m and up to a height of 24.00 m with not more than three tenements or 500 sqm. per floor (whichever is less), one staircase of 1.50 mtrs. of width may be permitted. If by any case the floor area or the number of tenements exceed the above value, the number of staircase should be increased as per the prescribed norms in table given below :-Table II
Category of building Area per floor Width of the Stairway (Mtr.) Minimum Number Staircase of (Height upto 11.0Mtrs) Minimum Number of Staircase (Height upto 11.0Mtrs.)
Education Up to 500 sqm. 1.35 2 2
Above 500 sqm. 2 2 2
Assembly Up to 500 sqm. 1.5 1 2
Above 500 sqm. 2 2 2
Institutional Up to 500 sqm. 1.5 1 2
Above 500 sqm. 2 2 2
Business Up to 500 sqm. 1.5 1 2
Above 500 sqm. 1.5 2 2
Mercantile (Retail) Up to 500 sqm. 1.8 2 2
Above 500 sqm. 2 2 2
Provided taht building for Marriage hall, Banquet Hall, Multipurpose Hall shall have at least two number of staircase of any height and floor area.