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State of Kerala - Section

Section 45 in Kerala Municipality Building Rules, 1999

45. Exit Width.

(1)The unit of exit width used to measure the capacity of any exit shall be 50 cms., a clear width of 25 cms. shall be counted as an additional half unit and clear width less than 25 cms. shall not be counted for exit width.
(2)Occupants per unit exit width shall be as in Table 6.Occupants per unit exit width
Sl. No. Group of occupancy No. of Occupants per unit exit width ofStairway Doors
(1) (2) (3) (4)
1. Group A1 Residential 25 75
2. Group A2 Special Residential 50 75
3. Group B Educational 25 75
4. Group C Medical/Hospital 25 75
5. Group D Assembly 60 90
6. Group E 50 75
7. Group F Mercantile (Commercial) 50 75
8. Group G1 Industrial 50 75
9. Group G2 Small Industrial 50 75
10. Group H Storage (including Warehousing) 50 75
11. Group I Hazardous 25 40
(3)For determining the exit required, the number of persons in any floor area or the occupant load shall be based on the actual number of occupants but in case less than that specified in Table 7.Occupant Load
Sl. No. Group of occupancy Occupant Load (gross area in square meters perperson)
(1) (2) (3)
1. Group A1 Residential 12.5
2. Group A2 Special Residential 4.0
3. Group B Educational 4.0
4. Group C Medical/Hospital 15.0
5. Group D Assembly 1.5
6. Group E Office 1.5
7. Group F Mercantile (Commercial) 3 to 6
8. Group G1 Industrial 10.0
9. Group G2 Small Industrial 10.0
10. Group H Storage (including Warehousing) 30.0
11. Group I Hazardous 10.0
(4)Exits shall be either horizontal or vertical type.
(5)An exit may be a doorway corridor or passageway to an internal staircase or external staircase, ramps to the street or to the roof of a building; it may be a horizontal exit leading to an adjoining building at the same level:Provided that lifts and escalators shall not be considered as exits.