Course Presentation

1. Department of Environmental Science and Engineering
Jatiya Kabi Kazi Nazrul Islam University
Trishal-2224, Mymensingh
Bangladesh National Building
Code (BNBC) – 2020
Submitted By,
Saida Islam Sejuti
ID no: 18103432
Reg no: 6829
4th
Year, 2nd
Semester (2017-18)
Submitted To,
Dr. Md. Badiuzzaman Khan
Professor and Former Head
Department of Environmental Science
Bangladesh Agricultural University
Course Name: Environmental Planning and Design
Course Code: ESE 4203
Presentation on

2. Outline of the Presentation
 Introduction to BNBC 2020
 Volume 1
 Part 1: Scope and Definition
 Part 2: Administration and
Enforcement
 Part 3: General Building
Requirements, Control and Regulation
 Part 4: Fire Protection
 Part 5: Building Materials
 Volume 2
 Part 6: STRUCTURAL DESIGN
 Volume 3
 Part 7: Construction Practices and Safety
 Part 8: Building Services
 Part 9: Alteration, Addition to and
Change of Existing Buildings
 Part 10: Signs and Outdoor Display
 Conclusion

3. Introduction to BNBC 2020
History of Building Codes in Bangladesh
 The Building Construction Act was enacted in 1952
 The first draft building code was drafted in1993 by HBRI.
 The BC Act 1952 was amended in 2006 by giving power to make
Bangladesh National Building Code.
 BNBC was enacted through a Statutory Regulatory Order (SRO) in
2006.
 HBRI undertook BNBC updating project in 2009.
 Final version of the updated code was submitted in 2015.
 Final version has already been approved by the steering committee and
the Ministry of Housing and Public Works and vetted by the Law Ministry.
 The updated code was gazette on February 2021.

4. Introduction to BNBC 2020
Act 318-08 ACI 318M-08:Building Code Requirements for
Reinforced Concrete, 2008
AISC 360-05 Specifications for structural Steel Buildings.
ASCE 7-05 ASCE/SEI 7-05: Minimum Design Loads for Buildings
and Other Structures.
EURO CODE Eurocode 8: Design of Structures for earthquake
resistance.

5. Introduction to BNBC 2020
BNBC in
3
Volumes
• Part 1: SCOPES AND DEFINITION
• Part 2: ADMINISTRATION AND ENFORCEMENT
• Part 3: GENERAL BUILDING REQUIREMENTS,
CONTROL AND REGULATION
• Part 4: FIRE PROTECTION
• Part 5: BUILDING MATERIALS
Volume
1
• Part 6: STRUCTURAL DESIGN
Volume
2
• Part 7: CONSTRUCTION PRACTICE AND SAFETY
• Part 8: BUILDING SERVICES
• Part 9: ADDITION, ALTERATION TO AND CHANGE
OF USE OF EXISTING BUILDINGS
• Part 10: SIGNS AND OUT-DOOR DISPLAY
Volume
3

6. VOLUME - 1

7. Part 1: SCOPE AND DEFINITION
Title, Purpose, Scope, Etc.
Definitions
Abbreviations
Chapter
1
Chapter
2
Chapter
3

8. Part 2: ADMINISTRATION AND ENFORCEMENT
Purpose and
Applicability
Establishment and
Authority Etc.
Permit and
Chapter
1
Chapter
2
Chapter
3

9. Part 3: GENERAL BUILDING REQUIREMENTS,
CONTROL AND REGULATION
Cha
pter
1
• General Building Requirements
Cha
pter
2
• Classification of Buildings Based on
Occupancy
Cha
pter
3
• Classification of Building Construction
Type Based on Fire Resistance
Chapt
er
4
• Energy Efficiency and Sustainability

10. OCCUPANCY CLASSIFICATION
A: Residential
B: Educational Facilities
C: Health Care Facilities
E: Business
F: Mercantile
G: Industrial Buildings
H: Storage Buildings
I: Assembly
J: Hazardous Building
K:Garage
Miscellaneous

11. CLASSIFICATION OF BUILDING CONSTRUCTION
TYPE BASED ON FIRE RESISTANCE
GROUP I: Noncombustible
Subdivision:
 Type I-A: 4-hour fire Protected
 Type I-B: 3-hour fire Protected
 Type I-C: 2-hour fire Protected
 Type I-D: 1-hour fire Protected
 Type I-E: Unprotected
GROUP II: Combustible
Subdivision:
 Type II-A: Heavy timber
 Type II-B: Protected wood joist
 Type II-C: Unprotected wood joist
 Type II-D: Protected wood frame
 Type II-E: Unprotected wood frame

12. Part 4: Fire Protection
Chapter 1: General Provisions
Chapter 2: Precautionary Requirements
Chapter 3: Means of Egress
Chapter 4: Equipment and In-built Facilities Standards
Chapter 5: Specific Requirements for Fire Detection and Extinguishing System

13. Part 5: Building Materials
• Source and Definition
Chapter 1
• Building Flooring matter, and waste item
Chapter 2
 Masonry
 Cement and concrete
 Pre-stressed concrete
 Building limes
 Gypsum based materials and plaster
 Flooring materials
 Steel
 Timber and wood products
 Doors, windows and ventilators
 Aluminum and aluminum alloys
 Builders hardware
 Roof coverings
 Paints and varnishes
 Sanitary appliances and water fittings
 Miscellaneous materials
 CGI sheet roofing and walling

14. VOLUME - 2

15. Chapter 1: Definitions and General
Requirements
Chapter 8: Detailing of Reinforced Concrete
Structures
Chapter 2: Loads on Buildings and Structures Chapter 9: Prestressed Concrete Structures
Chapter 3: Soils and Foundations Chapter 10: Steel Structures
Chapter 4: Bamboo Chapter 11: Timber
Chapter 5: Concrete Material Chapter 12: Ferrocement Structures
Chapter 6: Strength Design of Reinforced
Concrete Structures
Chapter 13: Steel-concrete Composite
Structural Members
Chapter 7: Masonry Structures
Part 6: STRUCTURAL DESIGN

16. VOLUME - 3

17. Part 7: Construction Practices and Safety
Chapter 1
Constructional Responsibilities and
Practices
Chapter 2
Storage, Stacking and Handling Practices
Chapter 3
Safety During Construction
Chapter 4
Demolition Work
Chapter 5
Maintenance Management, Repair, Retrofitting
and Strengthening of Buildings

18. Part 8: Building Services
Chapter 1: Electrical and Electronic Engineering Services for Buildings
Chapter 2: Air-conditioning, Heating and Ventilation
Chapter 3: Building Acoustics
Chapter 4: Lifts, Escalators and Moving Walks
Chapter 5: Water Supply
Chapter 6: Sanitary Drainage
Chapter 7: Rainwater Management
Chapter 8: Fuel Gas

19. Part 9: Alteration, Addition to and Change of
Existing Buildings
Applicability and
Implementation
Evaluation and
Compliance
Conservation
Chap
ter 1
Chap
ter 2
Chap
ter 3

20. Part 10: Signs and Outdoor Display
Scope
and
General
General
Require
ments
Specific
Requirement
s of Various
Types of
Signs
Chapter
1
Chapter
2
Chapter
3

21. …..T H A N K Y O U…..
Conclusion
Bangladesh National Building Code 2020 is a proper strategical guidance
for establishing or constructing a safe and sound concreate or residential
structure. And that is why, we must need a clear knowledge on this BNBC
2020 while planning for any construction activities and follow it for our
own protection purposes as well.