09-05-2018, 09:45 AM
Number of exits in school ( Educational) building
The minimum required number of exits in a building shall be determined based on occupant load and width required per person as appropriate to the type of exit for respective occupancies, subject to complying with maximum travel distance requirement .
As par National Building code (NBC) 2016 PART- 4 TABLE 5 :
In Educational occupancy Group (Group B) Maximum Travel Distance is 30.00 Meter in Type 1 and 2 construction and 22.50 Meter in Type 3 and 4 construction type.
For fully sprinklered building, the travel distance may be increased by 50 percent of the values specified. that is 45.00 Meter in Type 1 and 2 construction and 33.75 Meter in Type 3 and 4 construction type.
Ramp shall not be counted as an exit in case of basements below the first basement in car parking.
Arrangement of exits
a) Exits shall be so located that the travel distance on the floor shall not exceed the distance given above
b) Travel distance shall be measured from the most remote point within a storey or a mezzanine floor along the natural and unobstructed path of horizontal or vertical egress travel to the door to an exit.
c) The dead end corridor length in exit access shall not exceed 6 m for educational occupancies. (see figure below)
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d) 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
The minimum required number of exits in a building shall be determined based on occupant load and width required per person as appropriate to the type of exit for respective occupancies, subject to complying with maximum travel distance requirement .
As par National Building code (NBC) 2016 PART- 4 TABLE 5 :
In Educational occupancy Group (Group B) Maximum Travel Distance is 30.00 Meter in Type 1 and 2 construction and 22.50 Meter in Type 3 and 4 construction type.
For fully sprinklered building, the travel distance may be increased by 50 percent of the values specified. that is 45.00 Meter in Type 1 and 2 construction and 33.75 Meter in Type 3 and 4 construction type.
Ramp shall not be counted as an exit in case of basements below the first basement in car parking.
Arrangement of exits
a) Exits shall be so located that the travel distance on the floor shall not exceed the distance given above
b) Travel distance shall be measured from the most remote point within a storey or a mezzanine floor along the natural and unobstructed path of horizontal or vertical egress travel to the door to an exit.
c) The dead end corridor length in exit access shall not exceed 6 m for educational occupancies. (see figure below)
d) 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