The document outlines fire safety regulations and guidelines for buildings from the Department of Architecture at Southeast University. It specifies requirements for means of escape, exit placements, user numbers, and dimensional standards for corridors, doors, stairs, and ramps. Additionally, it details responsibilities for fire alarm systems, fire lifts, smoke detectors, command stations, and refuge areas in high-rise buildings.

1. FIRE SAFETYDepartment of architecture, South east university.
50,51 Tajgaon industrial area, Dhaka.

2. Means of escape:
1. Exit access
2. Exit
3. Exit discharge
Lift & Escalator will not be part of means of escape.
Exit should be always Free, so that man can go through.

3. General need:
• Exit & exit access corridor should not used as supply work.
• If Floor difference is more than 300 mm , ramp should be used.

4. • The exit access which is not used by disable & old people,
considerable step will be 200 mm.
• If there are more exit access,
exit sign will be used everywhere.

5. Placement of fire exit:
• Exit should not open in that place which will close or used for
dangerous work.
• Exit should not be locked.
• In national building, entry area will ½ of user no.

6. User number:
• In assembly & intuitional building, user number depends on
fixed seat.
• In case of without arm seat, 500 mm width will be provided for
1 user.
• 1 user requires min 0.3 sq.m.
• If roof is used, exit access will provided according to user no.

7. Size of exit:
Pg-3066,BNBC, 2008

8. Corridor :
• One sided closed corridor length maximum 10 m.
• Corridor width-
• More than 50 user- 1.1 m
• Less than 50 user- 0.9 m
• Health care building- 2.4 m
• Institution (more than 150 user)- 1.8 m

9. • Clear height of corridor
should be min 2.4 m.
• Exit access corridor’s fire
rating should be min 1 hr.
• Exit door’s fire rating
should be min ½ hr.

10. Assembly aisles :
• Assembly building should provide clear aisle to the exit.
• Maximum 1:8 ramp should considerable in exit access.
• The aisle’s minimum width 5 mm per user.
1:8 ramp

11. • If it will step, then
• tread 275mm
• Riser 100-200 mm

12. • Aisle width
• For both side seat- 1m
• For single seat- 0.9 m

13. Doors:
• Following chart will be used for 1 door.
Pg-3067,BNBC, 2008

14. • Exit door min Width 1 m
Height 2 m
• Sliding or hanging door should not used as fire exit.
• The clear area from door to stair should be min 0.9m
• In assembly & institutional building where more than 200 user,
revolving door should not be used.

15. Stair :
i. Exit stair’s landing width will not less
than stair width.
ii. In circular & spiral stair,
• stair width 650 mm
• Tread width 200-300 mm.
Fig: i
Fig: ii

16. • In fire stair, if Clear width is 1 m
1 sided hand rail should be provided
• If clear width is more than 1m,
both sided hand rail needed.
• If clear width is more than 2.2 m,
Hand rail is needed in middle.

17. • Every Exit stair should be made of fire
resistant material.
• If lift shaft is made of fire resistant
material, then its surrounding stair can
consider as fire stair.
• Outer stair can be used as fire stair if it
ensure opening direct to ground.

18. Ramp:
i. Slope of exit ramp should not more than 1:12
ii. Ramp surface should be made of non slippery material.
iii. If ramp slope is more than 1:15 , handrail should be provided
both side.

19. Horizontal exit:
• Exit door should closed itself from the fire hazardous area.
• Exit width is not less than 1m.
• Minimum floor area without stair, lift shaft -
• In refugee camp, 0.28 sq.m. is needed per head.
• In hospital, 2.8 sq.m is needed per bed.

20. Number of exit:
• Stair number will be derived from chart 5 .
Pg-3071,BNBC, 2008

21. • Without chart 5, stair number should be decided according to
user number.
User number up to 500 – min exit 2 nos
User number 501-1000 – min exit 3 nos
More than 1000 – min exit 4 nos
• If building(other than residence) cross 10 story & 500 sq.m floor
area , then it requires minimum 2 fire exit.

22. Travel path :
• Exit should be designed in a certain distance so that occupant can
Easily get stair in travelling time.
• Maximum travel distance is given below:-
Pg-3072,BNBC, 2008

23. Store room type:
• If user no is more than 10 & floor area is more than 1400sq.m
,then minimum 2 fire exit is a must.
• Workers should be able to open the lock easily in case of
emergancy.

24. Fire alarm system:
• All buildings with a height of more than 20 m should provide
I. manually operated electrical fire alarm system
II. automatic fire alarm system.

25. Fire lift:
• Fire lift should be used in buildings
more than 20 m in height.
• Fire lift should have a load carrying
capacity of 8 persons.
• Power supply of the fire lift should be seperated from the main
source supplying the building.
• Must have an intercommunication with the fire command station.

26. • During fire, only fire man can operate such lifts.
• Lift speed shall be such as to reach the top floor
from ground level in 1 minute.
• On landing doors at each floor, the sign ‘ FIRE LIFT ‘ shall be
painted in such sizes as to be easily noticeable.

27. • A smoke detector senses smoke and give indication of fire.
• It is a part of fire alarm system.
Smoke detector

28. Smoke proof enclosure:
• In highrise occupants have provision to access stairway through vestibule
• It sometimes may be open balcony.
• All doors should be self closing type.
• The smoke proof wall should have a fire rating of 4 hours.
• The vestibule area should be naturally ventilated.

29. Command station:
• All building above 26 m height shall have a command station on
the entrance lobby with suitable public address system having
communication to all floors as well as facilities to receive
messages from all doors.
• Command Station shall be fitted and maintained.

30. Refuse area:
Refuge Area shall not be less than 15 sq.m at the heights
mentioned below :
a) Floors between 20 and 26 m One refuge area on the floor
immediately above 20 m.
b) Floors above 26 m One refuge area on the floor
immediately above 26 m and then one
refuge area five floor above 26 m.

31. Fire command room
Refuge area

32. For undergraduate professional practice presentation:
Akramul hoque masum
Biplob Hossain
Mahiza Hossain
Tania akter sunny
Ref: Emarot Nirmam Bidimala @ Bangldesh national building code(BNBC)
Department of architecture, South east university.
50,51 Tajgaon industrial area, Dhaka.