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State of West Bengal - Section

Section 127 in Kolkata Municipal Corporation Building Rules, 2009

127. Minimum Width provisions.

- The following provisions for minimum width shall be made :-Table - 8A
Category of Building Height of the Building, (Mtrs.) Width of the Stairway (Mtrs.) No. of Staircase
Residential Above 7.00 1.00 1
Above 7.00 and Up to 10.00 1.0 m. with landing 1.2 m. having maximum 150sq.m. floor plate in each floor 1
Above 10.00 and Upto 15.50 1.1 m. with landing 1.35 m. having maximum 150sq.m. floor plate in each floor 1
Above 15.50 and Upto 20.00 1.25 2
Above 20.00 and Upto 25.50 1.25 2
Above 25.50 and Up to 40.00 1.25 2
40.00 and above 1.50 2
However, for residential building not having more than three tenements or 500 sq. m. per floor (whichever is less) one staircase of 1.50 m. of width may be permitted upto a building height of 20 m. If in any case, the floor area or the number of tenements exceed the above value, the number of staircases should be increased as per the prescribed Table No. 8A.Table -8B
Category of Building Area per floor Width of the Stairway (Mtrs.) Minimum No. of Staircase (Height upto 12.5Mtrs.) Minimum No. of Staircase (Height Above 12.5Mtrs.)
Educational Upto 500 sq. m. 1.5 1 2
Above 500 sq. m. 1.8 2 2
Assembly Upto 500 sq. m. 1.50 1 2
Above 500 sq. m. 2.0 2 2
Institutional Upto 500 sq. m. 1.50 1 2
Above 500 sq. m. 2.0 2 2
Business Upto 500 sq. m. 1.50 1 2
Above 500 sq. m. 1.50 2 2
Mercantile (Retail) Up to 500 sq. m. 1.80 2 2
Above 500 sq. m. 2.00 2 2
However, buildings for marriage halls, banquet halls, multipurpose hall etc. shall have at least two staircases having a minimum width of 1.5 m for any height and floor area.Table - 8CMinimum width provision for passage and corridors
Category of passage or corridor Minimum width (m.)
Passage connecting vertical exit and thetenement or units Not less than the width of each stairwayspecified under Table 8A and 8B
Passage within an apartment 1.0 m,
Passage giving accessto shops in a mercantile building -(a) shops on one sideonly(b) shops on both side 2.03.0
Passage in a business building 2.5