PART 3 GENERAL BUILDING REQUIREMENTS, CONTROL AND REGULATION PART 3 Pages Chapter 1 GENERAL BUILDING REQUIREMENTS 3-1 Chapter 2 CLASSIFICATION OF BUILDINGS BASED ON OCCUPANCY 3-29 Chapter 3 CLASSIFICATION OF BUILDING CONSTRUCTION TYPE BASED ON 3-83 FIRE RESISTANCE Chapter 4 ENERGY EFFICIENCY AND SUSTAINABILITY 3-95 Appendices 3-105 TABLE OF CONTENTS PART 3 GENERAL BUILDING REQUIREMENTS, CONTROL AND REGULATION Chapter 1 GENERAL BUILDING REQUIREMENTS 1.1 SCOPE 3-1 1.2 TERMINOLOGY 3-1 1.3 LAND USE CLASSIFICATION 3-5 1.4 OCCUPANCY AND CONSTRUCTION CLASSIFICATION OF BUILDINGS 3-5 1.5 REQUIREMENTS OF PLOTS 3-7 1.5.1 General Requirements 3-7 1.5.2 Clearance from Overhead Electric Lines 3-7 1.5.3 Road, Formation level and Plinth Levels 3-7 1.5.4 Boundary Wall 3-8 1.6 PLOT SIZES 3-8 1.7 MEANS OF ACCESS 3-8 1.7.1 Internal Access Road 3-8 1.7.2 Pedestrian Path or Walkway or Footpath 3-9 1.8 OPEN SPACES WITHIN A PLOT 3-9 1.9 GENERAL HEIGHT AND AREA LIMITATIONS 3-15 1.10 OFF STREET PARKING SPACES 3-17 1.11 STREET ENCROACHMENT 3-18 1.12 COMMUNITY OPEN SPACE AND AMENITIES 3-18 1.13 MINIMUM STANDARD OF A DWELLING 3-18 1.14 REQUIREMENTS OF PARTS OF BUILDINGS 3-18 1.14.1 Plinth and Formation Levels 3-18 1.14.2 Room Dimensions 3-18 1.14.3 Kitchen 3-19 1.14.4 Bathroom and Toilets 3-19 1.14.5 Stairways 3-20 1.14.6 Mezzanine Floor 3-21 1.14.7 Lofts 3-21 1.14.8 Cabins or Chambers 3-21 1.14.9 Store Room 3-21 1.14.10 Private Garage 3-21 1.14.11 Basement 3-21 1.14.12 Entrance to the Building 3-22 1.14.13 Roof Drainage 3-22 2-iii Vol. 1 Part 3 General Building Requirements, Control and Regulation 1.14.14 Parapet 3-22 1.14.15 Septic Tank 3-22 1.15 LANDSCAPING 3-22 1.16 DAMP-PROOFING AND WATERPROOFING OF FLOORS AND WALLS 3-22 1.17 EXISTING BUILDINGS 3-23 1.18 BUILDINGS AND PLACES OF HISTORICAL OR ARCHITECTURAL VALUE 3-23 1.19 VENTILATION, LIGHTING AND SANITATION 3-23 1.20 AIR-CONDITIONING AND HEATING 3-24 1.21 PROVISION OF LIFTS AND ESCALATORS 3-24 1.22 SOUND INSULATION 3-25 1.23 THERMAL INSULATION 3-25 1.24 LIGHTNING PROTECTION OF BUILDINGS 3-25 1.25 RAT PROOFING AND TERMITE PROOFING OF BUILDINGS 3-25 1.26 REQUIREMENTS FOR BUILDINGS IN FLOOD PRONE AND COASTAL REGIONS OF BANGLADESH 3-25 1.26.1 Flood Prone Areas 3-25 1.26.2 Surge Prone Areas 3-26 1.27 REQUIREMENTS FOR BUILDINGS IN OTHER DISASTER PRONE AREAS 3-27 1.28 SPECIAL PROVISION FOR STORAGE OF DANGEROUS GOODS AND THEIR CLASSIFICATION 3-27 1.29 LIST OF RELATED APPENDICES 3-28 Chapter 2 CLASSIFICATION OF BUILDINGS BASED ON OCCUPANCY 2.1 OCCUPANCY CLASSIFICATION 3-29 2.2 CHANGE OF USE 3-35 2.3 MIXED OCCUPANCY 3-35 2.4 GENERAL REQUIREMENTS OF ALL OCCUPANCIES 3-36 2.4.1 Location on Property 3-36 2.4.2 Allowable Floor Areas 3-37 2.4.3 Permitted Types of Construction 3-37 2.4.4 General provision for High-Rise Buildings 3-38 2.4.5 Helipads 3-38 2.4.6 Universal Accessibility 3-39 2.5 REQUIREMENTS FOR OCCUPANCY A - RESIDENTIAL BUILDINGS 3-39 2.5.1 Construction, Height and Allowable Area 3-39 2.5.2 Location on Property 3-39 2.5.3 Access and Exit Facilities and Egress System 3-39 2.5.4 Lighting and Ventilation 3-39 2.5.5 Sanitation 3-39 2.5.6 Minimum Dimension of Habitable and Non-habitable Rooms 3-39 2-iv Vol. 1 Part 3 General Building Requirements, Control and Regulation 2.5.7 Fire Detection, Alarm, Evacuation and Extinguishment 3-39 2.5.8 Shaft and Exit Enclosure 3-40 2.6 REQUIREMENTS FOR OCCUPANCY B - EDUCATIONAL BUILDINGS 3-40 2.6.1 Construction, Height and Allowable area 3-40 2.6.2 Location on Property 3-40 2.6.3 Access and Exit facilities and Egress System 3-40 2.6.4 Lighting, Ventilation and Sanitation 3-40 2.6.5 Minimum Dimensions of Class Rooms, Common Toilets and Staircases 3-40 2.6.6 Shaft and Exit Enclosure 3-40 2.6.7 Fire Detection, Alarm, Evacuation and Extinguishment System 3-40 2.7 REQUIREMENTS FOR OCCUPANCY C - INSTITUTIONAL BUILDINGS 3-41 2.7.1 Construction, Height and Allowable Area 3-41 2.7.2 Location on Property 3-41 2.7.3 Access and Exit Facilities and Egress System 3-41 2.7.4 Lighting, Ventilation and Sanitation 3-41 2.7.5 Shaft and Enclosure 3-41 2.7.6 Fire Detection, Alarm, Evacuation and Extinguishment System 3-41 2.8 REQUIREMENTS FOR OCCUPANCY D–HEALTH CARE FACILITIES 3-41 2.8.1 Construction, Height and Allowable Area 3-41 2.8.2 Location on Property 3-41 2.8.3 Access and Exit Facilities and Egress System 3-41 2.8.4 Lighting, Ventilation and Sanitation 3-41 2.8.5 Shaft and Enclosure 3-41 2.8.6 Fire Detection, Alarm, Evacuation and Extinguishment System 3-42 2.9 REQUIREMENTS FOR OCCUPANCY E–BUSINESS 3-42 2.9.1 Construction, Height and Allowable Area 3-42 2.9.2 Location on Property 3-42 2.9.3 Access and Exit Facilities and Egress System 3-42 2.9.4 Lighting, Ventilation and Sanitation 3-42 2.9.5 Shaft and Enclosure 3-42 2.9.6 Fire Detection, Alarm, Evacuation and Extinguishment System 3-42 2.10 REQUIREMENTS FOR OCCUPANCY F–MERCANTILE BUILDINGS 3-42 2.10.1 Construction, Height and Allowable Area 3-42 2.10.2 Location on Property 3-42 2.10.3 Access and Exit Facilities and Emergency Escapes 3-42 2.10.4 Lighting, Ventilation and Sanitation 3-42 2.10.5 Shaft and Enclosure 3-43 2-v Vol. 1 Part 3 General Building Requirements, Control and Regulation 2.10.6 Fire Detection, Alarm, Evacuation and Extinguishment System 3-43 2.10.7 Special Hazards 3-43 2.11 REQUIREMENTS FOR OCCUPANCY G–INDUSTRIAL BUILDINGS 3-43 2.11.1 Construction, Height and Allowable Area 3-43 2.11.2 Location on Property 3-43 2.11.3 Access and Exit Facilities and Egress System 3-43 2.11.4 Lighting, Ventilation and Sanitation 3-43 2.11.5 Shaft and Enclosure 3-43 2.11.6 Fire Detection, Alarm, Evacuation and Extinguishment System 3-44 2.11.7 Special Hazards 3-44 2.12 REQUIREMENTS FOR OCCUPANCY H–STORAGE BUILDINGS 3-44 2.12.1 Construction, Height and Allowable Area 3-44 2.12.2 Location on Property 3-44 2.12.3 Access and Exit Facilities and Egress System 3-44 2.12.4 Lighting, Ventilation and Sanitation 3-44 2.12.5 Shaft and Enclosure 3-44 2.12.6 Fire Detection, Alarm, Evacuation and Extinguishment System 3-44 2.12.7 Special Hazards 3-44 2.13 REQUIREMENTS FOR OCCUPANCY I–ASSEMBLY BUILDINGS 3-45 2.13.1 Construction, Height and Allowable Area 3-45 2.13.2 Location on Property 3-45 2.13.3 Access and Exit Facilities and Egress System 3-45 2.13.4 Lighting, Ventilation and Sanitation 3-45 2.13.5 Shaft and Enclosure 3-45 2.13.6 Fire Detection, Alarm, Evacuation and Extinguishment System 3-45 2.13.7 Motion Picture Projection Rooms 3-46 2.13.8 Sports Facilities 3-46 2.13.9 Amusement Building Fire protection System 3-47 2.14 REQUIREMENTS FOR OCCUPANCY J–HAZARDOUS BUILDINGS 3-47 2.14.1 General 3-47 2.14.2 Special Provisions 3-49 2.14.3 Construction, Height and Allowable Area 3-50 2.14.4 Location on Property 3-52 2.14.5 Access and Exit Facilities and Emergency Escapes 3-53 2.14.6 Lighting and Ventilation 3-53 2.14.7 Sanitation 3-53 2.14.8 Shaft and Exit Enclosures 3-53 2-vi Vol. 1 Part 3 General Building Requirements, Control and Regulation 2.14.9 Fire detection, Alarm, Evacuation and Extinguishment system 3-53 2.14.10 Explosion Control 3-53 2.14.11 Special Hazard 3-54 2.15 REQUIREMENTS FOR OCCUPANCY K–GARAGE BUILDINGS 3-54 2.15.1 Construction, Height and Allowable Area 3-54 2.15.2 Location on Property 3-55 2.15.3 Access and Exit Facilities and Emergency Escapes 3-55 2.15.4 Lighting, Ventilation and Sanitation 3-55 2.15.5 Shaft and Enclosure 3-55 2.15.6 Fire Detection, Alarm, Evacuation and Extinguishment System 3-55 2.16 REQUIREMENTS FOR OCCUPANCY L – UTILITY BUILDINGS 3-55 2.16.1 Construction, Height and Allowable Area 3-55 2.16.2 Location on Property 3-55 2.16.3 Access and Exit Facilities and Egress System 3-55 2.16.4 Lighting, Ventilation and Sanitation 3-55 2.16.5 Shaft and Enclosure 3-55 2.16.6 Fire Detector, Alarm, Evacuation and Extinguishment System 3-56 2.16.7 Special Hazard 3-56 2.17 REQUIREMENTS FOR OCCUPANCY M – MISCELLANEOUS BUILDINGS 3-56 2.17.1 General 3-56 2.17.2 Location on Property 3-56 2.17.3 Access and Exit Facilities and Emergency Escapes 3-56 2.17.4 Lighting, Ventilation and Sanitation 3-56 2.17.5 Shaft and Exit Enclosures 3-56 2.17.6 Fire Detection, Alarm, Evacuation and Extinguishment System 3-56 Chapter 3 CLASSIFICATION OF BUILDING CONSTRUCTION TYPES BASED ON FIRE RESISTANCE 3.1 General 3-83 3.1.1 Classification by Type of Construction 3-83 3.1.2 Group I.