2024 Ontario Building Code Guide: Hazard Index for Group B Division 3 Care Occupancies
Sarah's Expert Insight
OBC Compliance Specialist
"When converting existing residential or commercial properties in London, Oakville, or Muskoka into care facilities, the distinction between ambulatory and non-ambulatory residents is the most frequent source of building permit delays. At empcontracting.ca Inc., we advise clients that the mandatory sprinkler requirement under Note 5 often necessitates a water service upgrade, which should be factored into the initial feasibility study to avoid significant mid-project costs."
Understanding OBC Table 11.2.1.1.-H: Hazard Index for Care Facilities
Navigating Part 11 of the 2024 Building Code Compendium is essential for renovation projects involving care and custodial occupancies. Table 11.2.1.1.-H establishes the Hazard Index (H.I.) for Group B Division 3 structures, which directly influences the fire protection and structural requirements for your project. Whether you are developing a residential care facility or a convalescent home, partner with empcontracting.ca Inc. your construction contractor in London, Ontario, to ensure full compliance.
Occupancy Classifications and Hazard Ratings
The Hazard Index is determined by both the size of the building and the mobility of the residents (Ambulatory vs. Non-Ambulatory). High-risk environments, such as large facilities for non-ambulatory residents, carry a maximum H.I. of 6, requiring more robust safety measures.
- Residential Care Facilities: H.I. ranges from 3 (Small, Ambulatory) to 6 (Large).
- Children’s Custodial Homes: Follow a similar scale based on building area.
- Group Homes: Differentiated by minimum or maximum confinement levels.
Building Size Definitions
The OBC classifies building sizes as follows to determine the appropriate H.I.:
- Small: 600 m² (1 storey).
- Medium: 500 m² (2 storeys) or 1,000 m² (1 storey).
- Large: Any area not exceeding 18m in height.
Mandatory Sprinkler Requirements
According to the 2024 standards, any care occupancy, regardless of its Hazard Index or building size, must be equipped with an automatic sprinkler system. This is a non-negotiable safety standard for all Group B Division 3 projects managed by empcontracting.ca Inc. your construction contractor in London, Ontario.
Disclaimer: This content is generated from the Ontario Building Code for educational purposes. Always consult with a licensed professional engineer or your local building department before starting any construction project in London, Ontario.