National Building Code for Our Secondary Exit

8.5 Arrangement of Exits 8.5.1 Exits shall be so located that the travel distanceon the floor shall not exceed the distance given in Table 24. TABLE 24 TRAVEL DISTANCE FOR OCCUPANCY AND TYPE OF CONSTRUCTION si.xo. GROUP OF MAXIMUMTRAVEl. OCCUPANCY DISTANCECONSTRUCI10N , Types Types' 1&2 3&4 (1) (2) (3) (4) m m i) Residential (A) 22.5 22.5 ii) Educational (B) 22.5 22.5 iii) Institutional (C) 22.5 22.5 iv) Assembly (D) 30.0 30.0 v) Business (E) 30.0 30.0 vi) Mercantile (F) 30.0 30.0 vii) Industrial (G) 45.0 viii) Storage (H) 30.0 ix) Hazardous (J) 22.5 NOTE 1- For the sprinkler system, the travel distance may be increased by 50 percent of the values specified. NOTE 2 - In so far as basements are concerned, the travel distance will reckon half the value as prescribed in Table 24. Ramps shall also be counted as one of the means of,escape. • Construction of. type 3 or 4 is not permitted. 8.5.2 The travel distance to an exit from the dead end of a corridor shall not exceed half the distance specified in Table 24, except in assembly and institutional occupancies in which case it shall not exceed 6 m. 8.5.3 Whenever more than one exit is required for any room space or floor of a building, exits shall be placed as remote from each other as possible and shall be arranged to provide direct access in separate directions from any point in the area served. 8.6 Number of Exits 8.6.1 GENERAL - The general requirements of number of exits shall supplement the re- quirement of different occupancies in 9 to 17. 8.6.2 All buildings which are 15 m in height or above and all buildings used as educational, assembly, institutional, industrial, storage and hazardous occupancies, and mixed occupancies with any of the aforesaid occupancies, having area more than 500 m2 on each floor shall have a minimum of two staircases. They shall be of enclosed type; at least one of them shall be on external walls of buildings and shall open directly to the exterior, interior open space or to an open place of safety. Further, the provision or otherwise of alternative stair- -case shall be SUbject to the requirements of travel distance being complied with. 8.7 Doorways 8.7.1 E~ exit doorway shall open into an enclosed stairway or a horizontal exit of a corridor or passageway providing continuous and protected means of egress. 8.7.2 No exit doorway shall be less than 100 em in width except assembly buildings where door width shall be not less than 200 em. Doorways shall be not less than 200 em in hight. 8.7.3 Exit doorways shall open outwards, that is, away from the room, but shall not obstruct the travel along any exit. No door, when opened, shall reduce the required width of stairway or landing to less than 90 em; over- head or sliding doors shall not be installed. NOTE - In the case of buildings where there is a central corridor, the doors of rooms shall open inwards to permit smooth flow of traffic in the corridor. 8.7.4 Exit door shall not open immediately upon a flight of stairs; a landing equal to at least the width of the door shall be provided in the stairway at each doorway; the level of landing shall be. the same as that of the floor which it serves. 8.7.5 Exit doorways shall be openable from the side which they serve without the use of a key. 8.7.6 Mirrors shall not be placed in exit ways or exit doors to avoid confusion regarding the direction of exit. 8.8 Corridors and Passageways 8.8.1 Exit corridors and passageways shall be of width not less than the aggregate required width of exit doorways leading from them in the direction of travel to the exterior. 8.8.2 Where stairways discharge through corridors and passageways, the height of corridors and passageways shall be not less than 2.4m. 8.8.3 All means of exit including staircases, lift lobbies and corridors shall be adequately ventilated. NATIONAL BUILDING CODE OF INb~

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Transcript of National Building Code for Our Secondary Exit

Page 1: National Building Code for Our Secondary Exit

8.5 Arrangement of Exits

8.5.1 Exits shall be so located that the traveldistanceon the floor shall not exceed the dis-tance given in Table 24.

TABLE 24 TRAVEL DISTANCE FOROCCUPANCY AND TYPE OF CONSTRUCTION

si.xo. GROUP OF MAXIMUMTRAVEl.OCCUPANCY DISTANCECONSTRUCI10N

, Types Types'1&2 3&4

(1) (2) (3) (4)m m

i) Residential (A) 22.5 22.5ii) Educational (B) 22.5 22.5iii) Institutional (C) 22.5 22.5iv) Assembly (D) 30.0 30.0v) Business (E) 30.0 30.0vi) Mercantile (F) 30.0 30.0vii) Industrial (G) 45.0viii) Storage (H) 30.0ix) Hazardous (J) 22.5

NOTE 1- For the sprinkler system, the travel distancemay be increased by 50 percent of the values specified.

NOTE 2 - In so far as basements are concerned, thetravel distance will reckon half the value as prescribedin Table 24. Ramps shall also be counted as one of themeans of,escape.

• Construction of. type 3 or 4 is not permitted.

8.5.2 The travel distance to an exit from thedead end of a corridor shall not exceed half thedistance specified in Table 24, except in as-sembly and institutional occupancies in whichcase it shall not exceed 6 m.

8.5.3 Whenever more than one exit is re-quired for any room space or floor of a build-ing, exits shall be placed as remote from eachother as possible and shall be arranged toprovide direct access in separate directionsfrom any point in the area served.

8.6 Number of Exits8.6.1 GENERAL - The general requirementsof number of exits shall supplement the re-quirement of different occupancies in 9 to 17.

8.6.2 All buildings which are 15 m in heightor above and all buildings used as educational,assembly, institutional, industrial, storage andhazardous occupancies, and mixed occupan-cies with any of the aforesaid occupancies,having area more than 500 m2 on each floorshall have a minimum of two staircases. Theyshall be of enclosed type; at least one of themshall be on external walls of buildings and shallopen directly to the exterior, interior open

space or to an open place of safety. Further,the provision or otherwise of alternative stair--case shall be SUbject to the requirements oftravel distance being complied with.

8.7 Doorways

8. 7.1 E~ exit doorway shall open into anenclosed stairway or a horizontal exit of acorridor or passageway providing continuousand protected means of egress.

8.7.2 No exit doorway shall be less than 100em in width except assembly buildings wheredoor width shall be not less than 200 em.Doorways shall be not less than 200 em inhight.

8.7.3 Exit doorways shall open outwards, thatis, away from the room, but shall not obstructthe travel along any exit. No door, whenopened, shall reduce the required width ofstairway or landing to less than 90 em; over-head or sliding doors shall not be installed.

NOTE - In the case of buildings where there is acentral corridor, the doors of rooms shall open inwardsto permit smooth flow of traffic in the corridor.

8.7.4 Exit door shall not open immediatelyupon a flight of stairs; a landing equal to atleast the width of the door shall be provided inthe stairway at each doorway; the level of land-ing shall be. the same as that of the floor whichit serves.

8.7.5 Exit doorways shall be openable fromthe side which they serve without the use of akey.

8.7.6 Mirrors shall not be placed in exit waysor exit doors to avoid confusion regarding thedirection of exit.

8.8 Corridors and Passageways

8.8.1 Exit corridors and passageways shall beof width not less than the aggregate requiredwidth of exit doorways leading from them inthe direction of travel to the exterior.

8.8.2 Where stairways discharge through cor-ridors and passageways, the height of cor-ridors and passageways shall be not less than2.4m.

8.8.3 All means of exit including staircases,lift lobbies and corridors shall be adequatelyventilated.

NATIONAL BUILDING CODE OF INb~