BECM 4200: Professional Practice
Building Construction Act According to
Bangladesh Imarat Nirman Bidhimala-2008
Presented to:
Md. Shahriar Hossain
Assistant Professor
Group 02
Roll:
1823009
1823011
1823012
1823013
1823014
1823015
1823016
1823017
1823018
Khulna University of Engineering & Technology
Department of Building Engineering and Construction Management
1823011
Floor area ratio (FAR) is the measurement of a building's floor
area in relation to the size of the plot that the building is
located on.
What is FAR?
1823011
From Clause 51.1 :
For Residential Building, for 7.5 Katha plot area –
 FAR = 4.00
18.29 m
 MGC = 60% (Taking 57.14%)
Gross Floor Area
FAR =
Land Area
FAR to No of
Floor
4.0 = Gross Floor Area
27.44 m
501.93
Gross Floor Area = 2007.72 𝑚2
MGC = 57.14% of 501.93 𝑚2
= 286.80 𝑚2
No. of Floor =
2007.72
286.80
= 7.00 nos.
6 m Wide Road
1823011
1.50 m
Setback
Regulation
4 Katha
– 18 road
Katha
For
further
increment, from the
center of the road
at
1.25 m
least within 4.5 m no
building
can
be
constructed.
2.00 m
[Clause: 46.2]
1823011
FAR with
MGC
•
•
•
•
•
•
[Clause: 51.2]
Residential House & Residential Hotel
Educational Building
Institution & Health Serive
Assembly and Religious Building
Commercial Building
Industrial Building
1823011
For A5 (Residential Hotel) buildings, if the land is bigger than
20 katha or is next to a road that's 18 meters wide or wider
(excluding the space needed on the ground floor), one can have
a podium that's up to 12 meters tall, including the parapet.
Maximum
Approval
FAR
[Clause: 51.2]
1823011
 Open space on ground floor shall be considered FAR free.
Maximum
Approval
FAR
[Clause: 51.2]
B1 (School, College,
University)
B2 (Kindergarten,
Primary School)
20%
40%
 Class B1 and B2 use shall not be permitted up to 335 sq.
meters or 5 kathas of land.
1823011
 Considering the height of the podium up to 12 m with
parapet wall for different structure based on the following
condition:
Building Type
Institution & Health Service
Maximum
Approval
FAR
[Clause: 51.2]
Condition
Land Area: Above 20 Katha
Road Width: 18 m
Assembly & Religious
Building
Land Area: Any
Road Width: 24 m
Commercial Building
Land Area: Any
Road Width: Any
1823011
 For Calculating FAR, room height should be considered as:
Plain Surface = Maximum Floor Height 4.25 m
Pitched Surface = Maximum Average Floor Height 4.25 m
Maximum
Room Height
for FAR
Calculation
[Clause: 51.2]
1823011
 For Calculating the room height:
Calculation
of FAR from
Room Height
 If, 4.25 m > Floor Height < 6 m,
Floor Area of that room,
Floor Area (FA) = Floor Area (FA) + 50% of Room FA ;
[50% RFA < 10% of Total Floor area (TFA)]
 If, Floor Height > 6 m,
Floor Area of that room,
Floor Area (FA) = Floor Area (FA) + 100% of FA ;
 2nd condition can’t be used for the ground coverage of
some specific building type.
[Clause: 51.3]
1823011
 For Calculating the room height: (An Example)
Room
Calculation
of FAR from
Room Height
Total floor area
Suppose, we have a building with a floor height of 5 m
Room Area = 20 sq.m
Floor Area = 120 sq.m
[10% of 120 = 10 sq.m > 50% of 20 = 8 sq.m]
So, Total Floor Area = 120 + 50% of 20 = 130 sq.m
[Clause: 51.3]
1823011
 For Calculating the room height: (An Example)
Room
Calculation
of FAR from
Room Height
Total floor area
Suppose, we have a building with a floor height of 7 m
Room Area = 20 sq.m
Floor Area = 120 sq.m
So, Total Floor Area = 120 + 100% of 20 = 140 sq.m
[Clause: 51.3]
Maximum
Ground
Coverage
1823012
 MGC or Maximum Ground Coverage is the percentage of
the ratio of the total covered area of the building and the total
land area of the site.
 It is calculated by dividing the covered area (plinth area) of
the building by the total area of the plot and multiplying by
100.
 MGC is expressed as a percentage and varies depending on
the occupancy type of the building, the size of the plot,
and the width of the road (Clause 50.1).
01
 Formula for Maximum Ground Coverage (MGC):
Maximum
Ground
Coverage
 MGC for different occupancy types, different plot sizes, and
different widths of the road are prescribed by the Dhaka
Mohanogor Imarat (Nirman, Unnoyon, Songrokkon o
Oposharon) Bidhimala, 2008.
1823012
02
 Here, a section is used as an example to study the FAR and
MGC rules prescribed.
Maximum
Ground
Coverage
Table 3 (ka) to 3 (cha)
includes regulations on
FAR and MGC
1823012
03
 Here, a section is used as an example to study the FAR and
MGC rules prescribed.
Maximum
Ground
Coverage
FAR and MGC according to Occupancy type:
1823012
Type A (A1-A5): Residential Houses and Hotels
Type B (B1-B2): Educational Institutes
Type C (C1-C4): Institutions
Type D (D1-D2): Healthcare
Type E (E1-E6): Assembly and Religious Establishments
Type F (F1-F5): Commercial Buildings
04
 Here, a section is used as an example to study the FAR and
MGC rules prescribed.
Maximum
Ground
Coverage
FAR and MGC are prescribed
for different Plot sizes and
different widths of the road
1823012
05
Maximum
Ground
Coverage
1823012
 Maximum Ground Coverage of 67.5% will be valid for plots
under 134 sq. m.
 For any plot larger than 1206 sq. m., MGC will be 50%.
 For a plot of any size, with an adjacent road of width 18 m or
more, MGC will be 50%.
 No part of a building can be extended outside MGC except
those mentioned in Clause 46.5.
06
 The spaces within a plot which shall be remained uncovered
up to the sky from the formation level of the building.
Mandatory
Open Space
 A maximum of 50% of Mandatory Open Space (MOS) can
be paved (Clause 46.5 Ka).
 Paved space can be used for Parking and Security
purposes.
 The height of any shade in the paved space will be a
maximum of 4 meters from the finished level or 3 meters
from the plinth level.
1823012
07
Mandatory
Open Space
M OS
Figure: Illustration of MOS space
1823012
08
Mandatory
Open Space
4m from finished space
3m from Plinth
Figure: Use of Paved space
1823012
09
Mandatory
Open Space
4m from finished space
3m from Plinth
Figure: Use of Paved space
1823012
10
Mandatory
Open Space
1823012
 50% of the MOS should be opened for rainwater absorption
(Clause 46.5 Ga).
 Basement can’t be extended in the area of 50% of MOS.
11
THANK
YOU
Professional
Practices
BECM 4200
Presented by:
Md. Sakhawat Hossain
Roll - 1823009
 Authority can give restriction to building height according
to local jurisdiction near
Building Height






Airport
Microwave station
Telecommunication station
Large water body
Riverside
Historical place
(as per clause 52.2 & 52.3)
Building Height (Cont.)
Aviation obstruction lighting used
To enhance the visibility of structures
45.7 m
150 ft
To reduce conflict with the safe navigation of
aircraft
If building height more than 45.7 meter or 150
feet
(as per clause 52.4)
Fig: Aviation Obstruction Lighting
Floor & Basement
Different building floors should be named as
Basement
Semi-basement
Ground floor
First floor
Second floor
Roof
(as per clause 53.1)
Floor & Basement
(Cont.)
Mechanical system should be used in
basement for
Proper lighting
Well ventilation system
To keep always dry
Prevention of damp in wall
(as per clause 53.2.1)
Upward slope should be used on entrance to prevent rain water from surface
(as per clause 53.2.2)
Floor &
Basement
(Cont.)
Floor & Basement (Cont.)
 Should have minimum one stair connected to
ground floor or ground surface from basement
 Stair number should be selected according to
user number and distance
(as per clause 53.2.3)
Thank you
Professional
Practices
BECM 4200
Presented by:
Hasibur Rahman
Roll - 1823014
In case of building design approval, there should be a
minimum 6 meter wide road including footpath.
Road and Footpath
(as per clause 54.1)
(Clause 54)
(6m)
If a road is less than 6 meters wide as per the approved design,
half of the land required for widening to 6 meters shall be
transferred equally on both sides.
Road and Footpath
(as per clause 54.2)
(Clause 54)
(X)
The FAR, required Setback and Maximum land cover of the plot
should be calculated based on the reduced land size after transfer
of required portion of land for roads.
Road and Footpath
(as per clause 54.3)
(Clause 54)
(X)
All new link roads should have sidewalks.
Road and Footpath
(Clause 54)
If there is no sidewalk on the connecting road in front of the plot, the
applicant shall construct and maintain it himself as per the order and
procedure of the authority.
(as per clause 54.8-54.9)
Edge Regulations
(Clause 55)
In unplanned areas, the boundary of
the plot located at the junction of two
roads should be Circular or at a fixed
distance or height from the edge.
(as per clause 55.1)
Edge Regulations
(Clause 55)
For this reason, the 1.5 m × 1.5 m
area of ​the land at the edge should be
kept empty on the ground and above
and no construction can be done.
(as per clause 55.2)
Thank you
Course No: BECM 4200
Course Title: Professional Practices
Presented by:
Md Ramjan Ali
Roll - 1823013
Department of Building Engineering and Construction Management
Parking (Clause 56.2):
0° (Parking)
 One way traffic with
Bay on one side
3.5m
 One way traffic with
Bay on both side
4m
 Two way traffic
with Bay on both
side
4.25 m
Parking (Clause 56.2):
45° (Parking)
 One way traffic with
Bay on one side
4.0m
 One way traffic with
Bay on both side
4.0m
 Two way traffic with
Bay on both side
4.25m
Parking (Clause 56.2):
90° (Parking)
 One way traffic with
Bay on one side
 One way traffic with
Bay on both side
4.25m
4.25m
 Two way traffic
with Bay on both
side
4.25m
Parking (Clause 56.3 & 56.4):
4.25m
 The separate entrances and exits must be at least 3 meters
wide.
 The width requirement is 4.25 meters for buses and trucks, and 6
meters for single entrances and exits.
Separate Entrance
6m
Single Entrance
Parking (Clause 56.5)
Minimum required parking space in case of designs submitted for enlargement project or building approval:
Type of Occupancy
Minimum Parking Requirements
Occupancy Type – “A” (Residential Building)
Single house / gross area of ​not more than 200 square meters
1 car parking
Single house / gross area of more than 200 square meters
1 car parking
Multi family and gross area of more than 200 square meters
1 car parking for each unit
140 square meters < gross area < 200 square meters
2 car parking for 3 unit
90 square meters < gross area < 140 square meters
1 car parking for 2 unit
60 square meters < gross area < 90 square meters
1 car parking for 4 unit
For Gross area of 60 square meters
1 car parking for 8 unit
For Gross area of 90 square meters (Without Car parking
area)
1 bike parking for 5 unit
Hotel ( Star Classified)
1 car parking for 5 guest room
Hotel ( General Classified)
1 car parking for gross area of ​200 square meters
Parking (Clause 56.6)
For parking of up to 4 vehicles, if required, angular parking directly from the road
may be provided subject to fulfillment of the following conditions:
 The angular parking should not exceed a 45-degree angle.
 Parking must be at least 15 meters away from the bus stand.
 Parking is prohibited within 25 meters of pedestrian crossings or
intersections.
 Parking is not allowed on the national highway.
Parking (Clause 56.8, 56.10 & 56.11)
4.25 m
 Ramps in parking lots should have a maximum slope of 1:8, and there should
be a flat 4.25-meter section before the ramp begins. However, this rule doesn't
apply if the ramp is only 0.75 meters high.
1
8
3m
 For one-way traffic, the minimum width is 3 meters, while for ramps
accommodating two-way traffic, it should be at least 4.25 meters wide for
regular vehicles.
 On residential sites, there should be a separate lane for merging traffic and a
parking area with at least 100 spaces. On other sites, there should be a merging
lane and a parking area with a minimum of 50 spaces.
4.25 m
Parking (Clause 56.12 & 56.13):
 Ramps need a minimum 2.25 meters of height clearance, and
if the land is up to 10 meters wide, only one entrance and one
exit are allowed.
 Car lifts can replace ramps for parking.
2.25 m
CLAUSE : 58
(Minimum requirements of
Building Dimensions)
ROLL: 1823016
Why we will follow minimum requirements of building dimension:
 Comfort: They give enough space for people to live or work comfortably.
 Public Health: Avoiding overcrowding keeps people healthy.
 Community Well-being: Following rules makes a nice place to live and work.
Minimum requirements of Building Dimensions
Bedroom Clause 58(A)
 Every unit should have at least one
bedroom with  Area of 9.5m2
 Width of 2.5m
 Other rooms should have at least  Area of 5m2
 Width of 2m
 Minimum Bedroom height should
be  height 2.75m
 Below beam 2.13m
 AC room 2.44m
Minimum requirements of Building Dimensions
Kitchen Clause 58(B)
 Kitchen room should have minimum
–
•
Area 4m2
•
Width 1.5m

Kitchen height should be at least
2.75m

Kitchen window area should be at
least 1m2
Fig: Plan of kitchen
Fig: Section of kitchen
Minimum requirements of Building Dimensions
Bathroom Clause 58(C)
 Bathroom including water closet & bath
place–


•
Minimum Area 2.75m2
•
Minimum Width 1m
Bathroom including water closet &
Toilet –
•
Minimum Area 1.2m2
•
Minimum Width 1m
Toilet with bath place & basin should
have –
•
Minimum
1.5m2
•
Minimum Width 1m
Floor
Area
Minimum requirements of Building Dimensions
Bathroom Clause 58(C)

Toilet with water closet & bath
place should have –
•
Minimum Floor Area
2.5m2
•
Minimum Width 1m

Minimum bathroom height should
be at least 2.13m

Bathroom should have at least
0.37m2 window area
Minimum requirements of Building Dimensions
Stair Clause 58(D)
Building Type
I.
II.
Minimum Stair
Width(m)
Residential
i. Single Family Home
ii. Apartment & Flat houses
iii. Mess, Hostel
iv. Low-class house
v. Residential Hotel
1.0
1.15
1.25
***
1.25
Educational Institutions
1.50
III. Institutional
1.50
IV. Health Care
2.00
V.
2.00
Assemblies
width of stair
Minimum requirements of Building Dimensions
Stair Clause 58(D)
Building Type
VI. Commercial Building
i. Office
ii. Small Shop and Market
iii. Big Shop and Other
iv. Daily Essential Services
in Market
VII. Other
Minimum Stair
Width(m)
1.50
1.50
2.00
1.50
1.25
width of stair
Minimum requirements of Building Dimensions
Stair Clause 58(D)
225mm
Tread
<
 Summation of Riser and Tread should be 400mm
• Riser 175mm
• Tread 225mm
 Max. no. of Steps 20
 Height of Head Room 2.15m
Landing_ width of stair
<
Tread + Riser_ 400
mm
Half Landing
Rise
r
Fig: Height of headroom
Fig: Section of stair
_< 175mm
Thank you
Professional
Practices
BECM 4200
Presented by:
Dipayan Biswas
Roll - 1823018
Fire Exit
Exit access
Exit
Exit discharge
Means of Escape: A
safe route provided
for people to travel
from any location in a
building to a place of
safety without need of
outside assistance.
(Clause 59.01.01)
General
Needs
 Ramps must be used if
level of the exit changes
more than 300mm.
(Clause 59.02.04)
Ramp
General
Needs (cont.)
 Exterior doors that are
not used by people with
disabilities or the elder,
can be stepped down to
a maximum of 200mm.
(Clause 59.02.04)
Highest Stepdown – 200mm
Exit sign
General
Needs (cont.)
 Direction of the exit
should be clearly visible
and illuminated.
(Clause 59.02.05)
Location of the
Exit
 Should not pass
through locked area.
(Clause 59.03)
Location of the
Exit (cont.)
 All the Exits should be
placed in a way that
ensures
Continuous,
Uninterrupted Means
of Escape
(Clause 59.03.04)
Occupant load
for various
occupancies
Required
Width of the
Exit Per
Occupant
Corridors &
Passages
Obstacle free and dead
end length not more than
10 m.
2.4m
Minimum clear height of
corridor or passageways
not less than 2.4 m
(Clause 59.06)
Not more than 10m
Fire resistance rating :
For exit access corridor- minimum 1 hour
For door to reach at exit access – minimum 1/2 hour
(Clause 59.06)
Occupancy
Maximum
Occupant Load
Maximum
Travel Distance
( m)
A Residential
C Institutional
D Health Care
12
23
B Educational
E Assembly
F Business and
Marcentile
G Industrial
50
23
H Storage
30
5
30
8
Exit Door
Distance for spaces
with 1 exit door
presented in the table.
If more than this table,
2 exit doors required
J Hazardous
(Clause 59.08)
Exit Door (cont.)
 Minimum width of exit door is 1m and
height 2m
 Exit access doors will be side swing type
and opening towards travelling
side only 0.9 m free space after swinging
 Sliding or hanging exit door is
forbidden
 Exit door will not open at stair flight
(Clause 59.08)
1m
2m
Thank you
Professional
Practices
BECM 4200
Presented by:
Soeb Hasan
Roll - 1823015
(Clause 59.09)
Stair
 Minimum width for landing can’t be
less than stair width
 For straight run stair, initial landing
1.2 m
Spiral Stair
(Clause 59.09.03)
 Only inside residential building
 Requirements:
 Minimum Width
650 mm
 Tread Depth
250 mm
 Riser
225-215 mm
Ramp
 Ramp slope
(Clause 59.10)
< 1:12
 If ramp slope > 1:15
Hand rail must be provided at both sides
 Materials must be non-slippery
Horizontal exit
(Clause 59.11)
Requirements:
 Minimum Width 1m
 If it is Inclined then slope must be 1:12 without
any tread
 Door must be opened at outside direction
 Except stair, shaft etc. Shelter area should be
Usual
For health center
0.28 sqm per person
2.8 sqm per bed
(Clause 59.12)
Number of exit
Requirements:
Building Type (Maximum
Storied)
Distance (m)
Users
Number
Users
Number of Exit
4 Storied Residential
23
12 people
1-500
2
10 Storied Residential
23
4 Unit at a
floor
501-1000
3
2 storied Other Building
23
50 people
1001-continue
4
1 storied Storage
30
30 people
1 Storied Hazardous &
Dangerous Building
8
5 people
Passage Length
(Clause 59.13)
Requirements: Users must find an exit from anywhere of the building
Building Type
Maximum Distance (m)
Residential, Educational,
Organizations, Health
Center, Religious
25
Commercial, Storage
30
Industry
45
Thank you
Universal
Accessibility
Presented by
Niaj Morshed
Roll: 1823017
General Rules
 Minimum rotational area.
1500 mm
x
1500 mm
 Minimum access and corridor
requirements.
 Vertical spacing.
1200 mm
 Floor materials.
100 mm
 Use of bevel and ramp.
680 mm
2m
300 mm
Door
 Minimum width.
800 mm
1500 mm x
1500 mm
 Door spacing.
1200 mm x
1200 mm
600 mm
 Door handle height.
 Appearance.
850 to 900 mm
Railing and Stair
 Minimum diameter of railing and free
space from attached wall.
38 to 50 mm
800 to 900 mm
 Railing height.
 Minimum tread and riser size.
 Tread Nosing size.
125 to 175 mm
 Railing requirements.
 Texture and visibility.
280 mm
1200 mm
Ramp
 Ramp ratio (1:12).
 Ramp length.
12 m
 Ramp width.
 Landing.
1.5 m
x
1.5 m
1.5 m
x
1.5 m
Lift
 Lift lobby requirements.
1.5 m
x
1.5 m
800 mm
 Command switches height.
 Lift door width.
890 to 1200 mm
 Lift cabin size.
 Platform lifting.
1500 mm
x
1200 mm
900 mm
x
1200 mm
1.5 m
x
1.5 m
Washroom and Toilet
 Toilet ratio for differently abled
persons.
 Spacing.
800 mm
 Railing requirements.
 Tap and basin requirements.
 Shower space.
> 850 mm
Parking and Seating
 Dedicated parking space for
differently abled persons.
3.2 m
 Parking space width.
 Dedicated seating space for
differently abled persons.
 Seating space requirements.
Thank you