Ontario Building Code 2024 — table of contents

Contents

DIVISION A

DIVISION B

Part 1. General

Part 2. Farm Buildings

2.1. General

2.2. Fire Protection and Occupant Safety

2.2.1. General

2.2.2. Building Size and Construction Relative to Major Occupancy

2.2.3. Fire Alarm and Detection Systems

2.2.4. Provisions for Firefighting

2.2.5. Emergency Lighting

2.2.6. Safety within Farm Buildings

2.2.7. Exits

2.2.8. Hazardous Substances, Processes and Equipment

2.3. Structural Loads and Procedures

2.4. Heating, Ventilating and Air-Conditioning

Part 3. Fire Protection, Occupant Safety and Accessibility

3.1. General

3.1.1. Scope and Definitions

3.1.2. Classification of Buildings or Parts of Buildings by Major Occupancy

3.1.3. Multiple Occupancy Requirements

3.1.4. Combustible Construction

3.1.5. Noncombustible Construction

3.1.6. Encapsulated Mass Timber Construction

3.1.7. Fire-Resistance Ratings

3.1.8. Fire Separations and Closures

3.1.9. Penetrations in Fire Separations and Fire-Rated Assemblies

3.1.10. Firewalls

3.1.11. Fire Blocks in Concealed Spaces

3.1.12. Flame-Spread Rating and Smoke Developed Classification

3.1.13. Interior Finish

3.1.14. Roof Assemblies

3.1.15. Roof Covering

3.1.16. Fabrics

3.1.17. Occupant Load

3.1.18. Reserved

3.1.19. Drainage and Grades

3.1.20. Above Ground Electrical Conductors

3.1.21. Glass in Guards

3.2. Building Fire Safety

3.2.1. General

3.2.2. Building Size and Construction Relative to Occupancy

3.2.2.1. Application

3.2.2.2. Special and Unusual Structures

3.2.2.3. Exceptions to Structural Fire Protection

3.2.2.4. Buildings with Multiple Major Occupancies

3.2.2.5. Applicable Building Height and Area

3.2.2.6. Multiple Major Occupancies

3.2.2.7. Superimposed Major Occupancies

3.2.2.8. Exceptions for Major Occupancies

3.2.2.9. Crawl Spaces

3.2.2.10. Streets

3.2.2.11. Exterior Balconies

3.2.2.12. Exterior Passageways

3.2.2.13. Occupancy on Roof

3.2.2.14. Rooftop Enclosures

3.2.2.15. Storeys Below Ground

3.2.2.16. Heavy Timber Roof Permitted

3.2.2.17. Roof Assemblies and Mezzanines in Gymnasiums, Swimming Pools, Arenas and Rinks

3.2.2.18. Automatic Sprinkler System Required

3.2.2.19. Buildings Containing Impeded Egress Zones

3.2.2.20. Group A, Division 1, Any Height, Any Area, Sprinklered

3.2.2.21. Group A, Division 1, One Storey, Limited Area, Sprinklered

3.2.2.22. Group A, Division 1, One Storey, Sprinklered

3.2.2.23. Group A, Division 2, Any Height, Any Area, Sprinklered

3.2.2.24. Group A, Division 2, up to 6 Storeys, Any Area, Sprinklered

3.2.2.25. Group A, Division 2, up to 2 Storeys

3.2.2.26. Group A, Division 2, up to 2 Storeys, Increased Area, Sprinklered

3.2.2.27. Group A, Division 2, up to 2 Storeys, Sprinklered

3.2.2.28. Group A, Division 2, One Storey

3.2.2.29. Group A, Division 3, Any Height, Any Area, Sprinklered

3.2.2.30. Group A, Division 3, up to 2 Storeys

3.2.2.31. Group A, Division 3, up to 2 Storeys, Sprinklered

3.2.2.32. Group A, Division 3, One Storey, Increased Area

3.2.2.33. Group A, Division 3, One Storey, Sprinklered

3.2.2.34. Group A, Division 3, One Storey

3.2.2.35. Group A, Division 4

3.2.2.36. Group B, Division 1, Any Height, Any Area, Sprinklered

3.2.2.37. Group B, Division 1, up to 3 Storeys, Sprinklered

3.2.2.38. Group B, Division 2, Any Height, Any Area, Sprinklered

3.2.2.39. Group B, Division 2, up to 3 Storeys, Sprinklered

3.2.2.40. Group B, Division 2, up to 2 Storeys, Sprinklered

3.2.2.41. Group B, Division 2, One Storey, Sprinklered

3.2.2.42. Group B, Division 3, Any Height, Any Area, Sprinklered

3.2.2.43. Group B, Division 3, Up to 3 Storeys, (Noncombustible), Sprinklered

3.2.2.44. Group B, Division 3, Up to 3 Storeys, Sprinklered

3.2.2.45. Group B, Division 3, Up to 2 Storeys, Sprinklered

3.2.2.46. Group B, Division 3, One Storey, Sprinklered

3.2.2.47. Group C, Any Height, Any Area, Sprinklered

3.2.2.48. Group C, up to 12 Storeys, Sprinklered, Encapsulated Mass Timber Construction

3.2.2.49. Group C, up to 6 Storeys, Sprinklered, Noncombustible Construction

3.2.2.50. Group C, up to 4 Storeys, Noncombustible Construction

3.2.2.51. Group C, up to 6 Storeys, Sprinklered, Combustible Construction

3.2.2.52. Group C, up to 4 Storeys, Sprinklered

3.2.2.53. Group C, up to 3 Storeys, Increased Area

3.2.2.54. Group C, up to 3 Storeys

3.2.2.55. Group C, up to 3 Storeys, Sprinklered

3.2.2.55A. Group C, Retirement Home, Any Height, Any Area, Sprinklered

3.2.2.55B. Group C, Retirement Home, up to 4 Storeys, Sprinklered, Increased Area

3.2.2.55C. Group C, Retirement Home, up to 4 Storeys, Sprinklered

3.2.2.55D. Group C, Retirement Home, up to 3 Storeys, Sprinklered, Noncombustible Construction

3.2.2.55E. Group C, Retirement Home, up to 3 Storeys, Sprinklered, Combustible Construction

3.2.2.56. Group D, Any Height, Any Area, Sprinklered

3.2.2.57. Group D, up to 12 Storeys, Sprinklered, Encapsulated Mass Timber Construction

3.2.2.58. Group D, up to 6 Storeys

3.2.2.59. Group D, up to 6 Storeys, Sprinklered, Noncombustible Construction

3.2.2.60. Group D, up to 6 Storeys, Sprinklered

3.2.2.61. Group D, up to 4 Storeys, Sprinklered

3.2.2.62. Group D, up to 3 Storeys

3.2.2.63. Group D, up to 3 Storeys, Sprinklered

3.2.2.64. Group D, up to 2 Storeys

3.2.2.65. Group D, up to 2 Storeys, Sprinklered

3.2.2.66. Group E, Any Height, Any Area, Sprinklered

3.2.2.67. Group E, up to 4 Storeys, Sprinklered

3.2.2.68. Group E, up to 3 Storeys

3.2.2.69. Group E, up to 3 Storeys, Sprinklered

3.2.2.70. Group E, up to 2 Storeys

3.2.2.71. Group E, up to 2 Storeys, Sprinklered

3.2.2.72. Group F, Division 1, up to 4 Storeys, Sprinklered

3.2.2.73. Group F, Division 1, up to 3 Storeys, Sprinklered

3.2.2.74. Group F, Division 1, up to 2 Storeys, Sprinklered

3.2.2.75. Group F, Division 1, One Storey

3.2.2.76. Group F, Division 2, Any Height, Any Area, Sprinklered

3.2.2.77. Group F, Division 2, up to 4 Storeys, Increased Area, Sprinklered

3.2.2.78. Group F, Division 2, up to 3 Storeys

3.2.2.79. Group F, Division 2, up to 4 Storeys, Sprinklered

3.2.2.80. Group F, Division 2, up to 2 Storeys

3.2.2.81. Group F, Division 2, up to 2 Storeys, Sprinklered

3.2.2.82. Group F, Division 3, Any Height, Any Area, Sprinklered

3.2.2.83. Group F, Division 3, up to 6 Storeys

3.2.2.84. Group F, Division 3, up to 6 Storeys, Sprinklered

3.2.2.85. Group F, Division 3, up to 4 Storeys

3.2.2.86. Group F, Division 3, up to 4 Storeys, Sprinklered

3.2.2.87. Group F, Division 3, up to 2 Storeys

3.2.2.88. Group F, Division 3, up to 2 Storeys, Sprinklered

3.2.2.89. Group F, Division 3, One Storey

3.2.2.90. Group F, Division 3, One Storey, Sprinklered

3.2.2.91. Group F, Division 3, One Storey, Any Area, Low Fire Load Occupancy

3.2.2.92. Group F, Division 3, Storage Garages up to 22 m High

3.2.2.93. Encapsulated Mass Timber Construction, Various Occupancies, Heights and Areas, Sprinklered

3.2.3. Spatial Separation and Exposure Protection

3.2.4. Fire Alarm and Detection Systems

3.2.5. Provisions for Firefighting

3.2.6. Additional Requirements for High Buildings

3.2.7. Lighting and Emergency Power Systems

3.2.8. Mezzanines and Openings Through Floor Assemblies

3.2.9. Testing of Integrated Fire Protection and Life Safety Systems

3.3. Safety Within Floor Areas

3.3.1. All Floor Areas

3.3.2. Assembly Occupancy

3.3.3. Care, Care and Treatment or Detention Occupancy

3.3.4. Residential Occupancy

3.3.5. Industrial Occupancy

3.3.6. Design of Hazardous Areas

3.4. Exits

3.5. Vertical Transportation

3.6. Service Facilities

3.7. Health Requirements

3.8. Barrier-Free Design

3.9. Portable Classrooms

3.10. Self-Service Storage Buildings

3.11. Public Pools

3.12. Public Spas

3.13. Rapid Transit Stations

3.14. Tents and Air-Supported Structures

3.15. Signs

3.16. Shelf and Rack Storage Systems

3.17. Demountable Stages and Demountable Support Structures

3.18. Additional Requirements for Existing Buildings

Part 4. Structural Design

4.1. Structural Loads and Procedures

4.1.1. General

4.1.2. Specified Loads and Effects

4.1.3. Limit States Design

4.1.4. Dead Loads

4.1.5. Live Loads Due to Use and Occupancy

4.1.6. Loads Due to Snow and Rain

4.1.7. Wind Load

4.1.8. Earthquake Load and Effects

4.2. Foundations

4.3. Design Requirements for Structural Materials

4.4. Design Requirements for Special Structures

Part 5. Environmental Separation

5.1. General

5.2. Loads and Procedures

5.3. Heat Transfer

5.4. Air Leakage

5.5. Vapour Diffusion

5.6. Precipitation

5.7. Surface and Ground Water

5.8. Sound Transmission

5.9. Standards

Part 6. Heating, Ventilating and Air-Conditioning

6.1. General

6.2. Design and Installation

6.3. Ventilation Systems

6.4. Heating Appliances

6.5. Thermal Insulation Systems

6.6. Refrigeration and Cooling Systems

6.7. Piping Systems

6.8. Equipment Access

6.9. Fire Safety Systems

Part 7. Plumbing

7.1. General

7.2. Materials and Equipment

7.2.1. General

7.2.2. Fixtures

7.2.3. Traps and Interceptors

7.2.4. Pipe Fittings

7.2.5. Non-Metallic Pipe and Fittings

7.2.6. Ferrous Pipe and Fittings

7.2.7. Non-Ferrous Pipe and Fittings

7.2.8. Corrosion-Resistant Materials

7.2.9. Jointing Materials

7.2.10. Miscellaneous Materials

7.2.11. Water Service Pipes and Fire Service Mains

7.3. Piping

7.4. Drainage Systems

7.4.1. Application

7.4.2. Connections to Drainage Systems

7.4.3. Location of Fixtures

7.4.4. Treatment of Sewage and Wastes

7.4.5. Traps

7.4.6. Arrangement of Drainage Piping

7.4.7. Cleanouts

7.4.8. Minimum Slope and Length of Drainage Pipes

7.4.9. Size of Drainage Pipes

7.4.10. Hydraulic Loads

7.5. Venting Systems

7.6. Potable Water Systems

7.7. Non-Potable Water Systems

Part 8. Sewage Systems

8.1. General

8.2. Design Standards

8.3. Class 1 Sewage Systems

8.4. Class 2 Sewage Systems

8.5. Class 3 Sewage Systems

8.6. Class 4 Sewage Systems

8.7. Leaching Beds

8.8. Class 5 Sewage Systems

8.9. Operation and Maintenance

Part 9. Housing and Small Buildings

9.1. General

9.2. Definitions

9.3. Materials, Systems and Equipment

9.4. Structural Requirements

9.5. Design of Areas, Spaces and Doorways

9.6. Glass

9.7. Windows, Doors and Skylights

9.8. Stairs, Ramps, Handrails and Guards

9.9. Means of Egress

9.9.1. General

9.9.2. Types and Purpose of Exits

9.9.3. Dimensions of Means of Egress

9.9.4. Fire Protection of Exits

9.9.5. Obstructions and Hazards in Means of Egress

9.9.6. Doors in a Means of Egress

9.9.7. Access to Exits

9.9.8. Exits from Floor Areas

9.9.9. Egress from Dwelling Units

9.9.10. Egress from Bedrooms

9.9.11. Signs

9.9.12. Lighting

9.10. Fire Protection

9.10.1. Definitions and Application

9.10.2. Occupancy Classification

9.10.3. Ratings

9.10.4. Building Size Determination

9.10.5. Permitted Openings in Wall and Ceiling Assemblies

9.10.6. Construction Types

9.10.7. Steel Members

9.10.8. Fire-Resistance and Combustibility in Relation to Occupancy, Height and Supported Elements

9.10.9. Fire Separations and Smoke-tight Barriers between Rooms and Spaces within Buildings

9.10.10. Service Rooms

9.10.11. Firewalls

9.10.12. Prevention of Fire Spread at Exterior Walls and Between Storeys

9.10.13. Doors, Dampers and Other Closures in Fire Separations

9.10.14. Spatial Separation Between Buildings

9.10.15. Spatial Separation Between Houses

9.10.16. Fire Blocks

9.10.17. Flame Spread Limits

9.10.18. Alarm and Detection Systems

9.10.19. Smoke Alarms

9.10.20. Firefighting

9.10.21. Fire Protection for Construction Camps

9.10.22. Fire Protection for Gas, Propane and Electric Cooktops and Ovens

9.11. Sound Transmission

9.12. Excavation

9.13. Dampproofing, Waterproofing and Soil Gas Control

9.14. Drainage

9.15. Footings and Foundations

9.16. Floors-on-Ground

9.17. Columns

9.18. Crawl Spaces

9.19. Roof Spaces

9.20. Masonry and Insulating Concrete Form Walls Not In Contact with the Ground

9.20.1. Application

9.20.2. Masonry Units

9.20.3. Mortar

9.20.4. Mortar Joints

9.20.5. Masonry Support

9.20.6. Thickness and Height

9.20.7. Chases and Recesses

9.20.8. Support of Loads

9.20.9. Bonding and Tying

9.20.10. Lateral Support

9.20.11. Anchorage of Roofs, Floors and Intersecting Walls

9.20.12. Corbelling

9.20.13. Control of Rainwater Penetration

9.20.14. Protection During Work

9.20.15. Reinforcement for Earthquake Resistance

9.20.16. Corrosion Resistance

9.20.17. Above-Ground Flat Insulating Concrete Form Walls

9.21. Masonry and Concrete Chimneys and Flues

9.22. Fireplaces

9.23. Wood Frame Construction

9.23.1. Application

9.23.2. General

9.23.3. Fasteners and Connectors

9.23.4. Maximum Spans

9.23.5. Notching and Drilling

9.23.6. Anchorage

9.23.7. Sill Plates

9.23.8. Beams to Support Floors

9.23.9. Floor Joists

9.23.10. Wall Studs

9.23.11. Wall Plates

9.23.12. Framing Over Openings

9.23.13. Bracing to Resist Lateral Loads Due to Wind and Earthquake

9.23.14. Roof and Ceiling Framing

9.23.15. Subflooring

9.23.16. Roof Sheathing

9.23.17. Wall Sheathing

9.24. Sheet Steel Stud Wall Framing

9.25. Heat Transfer, Air Leakage and Condensation Control

9.26. Roofing

9.26.1. General

9.26.2. Roofing Materials

9.26.3. Slope of Roof Surfaces

9.26.4. Flashing at Intersections

9.26.5. Eave Protection for Shingles and Shakes

9.26.6. Underlay Beneath Shingles

9.26.7. Asphalt Shingles on Slopes of 1 in 3 or Greater

9.26.8. Asphalt Shingles on Slopes of Less Than 1 in 3

9.26.9. Wood Roof Shingles

9.26.10. Cedar Roof Shakes

9.26.11. Built-Up Roofs

9.26.12. Selvage Roofing

9.26.13. Sheet Metal Roofing

9.26.14. Glass Reinforced Polyester Roofing

9.26.15. Hot Applied Rubberized Asphalt Roofing

9.26.16. Polyvinyl Chloride Sheet Roofing

9.26.17. Concrete Roof Tiles

9.26.18. Roof Drains and Downspouts

9.27. Cladding

9.28. Stucco

9.29. Interior Wall and Ceiling Finishes

9.30. Flooring

9.31. Plumbing Facilities

9.32. Ventilation

9.33. Heating and Air-Conditioning

9.34. Electrical Facilities

9.35. Garages and Carports

9.36. Reserved

9.37. Cottages

9.38. Log Construction

9.39. Park Model Trailers

9.40. Reinforced Concrete Slabs

9.41. Additional Requirements for Change of Use

Part 10. Change of Use

Part 11. Renovation

Part 12. Resource Conservation and Environmental Integrity

DIVISION C

Part 1. General

1.1. Application

1.2. Design and General Review

1.3. Permits and Inspections

1.4. Search Warrant

1.5. Designated Persons and Powers

1.6. Prescribed Person

1.7. Enforcement of the Provisions of the Act and this Code Related to Sewage Systems

1.8. Language

1.9. Fees

1.10. Sewage System Maintenance Inspection Programs

1.11. Tiny Houses

1.12. Off-Site Construction of Buildings

Part 2. Alternative Solutions, Disputes, Rulings and Interpretations

Part 3. Qualifications

3.1. Qualifications for Chief Building Officials and Inspectors

3.2. Qualifications for Designers

3.3. Qualifications for Persons Engaged in the Business of Constructing On Site, Installing, Repairing, Servicing, Cleaning or Emptying Sewage Systems

3.4. Qualifications for Registered Code Agencies

3.5. Classes of Registration and Categories of Qualifications

3.6. Insurance

3.7. Registered Code Agencies

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