OBC Group F Division 3: Industrial Building Standards for London, Ontario Construction
Sarah's Expert Insight
OBC Compliance Specialist
"In my experience consulting on industrial projects in London and Muskoka, the transition between Sections 3.2.2.89 and 3.2.2.90 is a major cost-driver; choosing to sprinkler a facility can more than double your allowable footprint. Partnering with empcontracting.ca Inc. your construction contractor in London, Ontario, allows you to strategically select fire-resistance ratings and construction materials that maximize your square footage without compromising OBC compliance."
Navigating the 2024 Ontario Building Code (OBC) is essential for successful industrial developments. Sections 3.2.2.88 through 3.2.2.91 outline the specific requirements for Group F, Division 3 occupancies—commonly known as low-hazard industrial buildings. Whether you are planning a warehouse in London or a manufacturing plant in Oakville, understanding these fire safety and construction limits is critical.
Understanding Group F, Division 3 Construction Requirements
Group F, Division 3 buildings are subject to strict regulations regarding building area, height, and fire-resistance ratings. Working with empcontracting.ca Inc. your construction contractor in London, Ontario, ensures your project meets these technical benchmarks while optimizing for cost and efficiency.
3.2.2.88: Multi-Storey Sprinklered Buildings
For buildings up to two storeys, the OBC permits combustible or noncombustible construction provided the facility is fully sprinklered. Key limits include:
- Maximum Area: 7,200 m² (1 storey) or 2,400 m² (2 storeys).
- Fire Ratings: Floor assemblies and loadbearing supports must maintain a minimum 45-minute fire-resistance rating.
3.2.2.89 & 3.2.2.90: Single-Storey Industrial Solutions
Single-storey low-hazard industrial buildings have flexible construction options including heavy timber or noncombustible materials. The allowable building area is significantly expanded when the building faces multiple streets or utilizes a comprehensive sprinkler system (up to 16,800 m²).
3.2.2.91: Unlimited Building Area for Low Fire Load Occupancies
For specialized facilities like power generating plants or noncombustible material storage, the code allows for an unlimited building area. However, these structures must be of strictly noncombustible construction and limited to a single storey to manage risk effectively.
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.