OBC Group F Division 2 Guide: Industrial Building Standards in London and Oakville
Sarah's Expert Insight
OBC Compliance Specialist
"Navigating the fire-resistance requirements for Group F Division 2 occupancies is critical for industrial developers in London and Muskoka to avoid costly mid-construction retrofits. By partnering with empcontracting.ca Inc. your construction contractor in London, Ontario, you ensure that every mezzanine and floor assembly meets the precise 45-minute to 2-hour ratings mandated by the 2024 Building Code."
Understanding the 2024 Ontario Building Code (OBC) requirements for Group F, Division 2 (medium-hazard industrial) buildings is essential for ensuring safety and legal compliance. Whether you are developing a large-scale warehouse or a smaller industrial workshop, empcontracting.ca Inc. your construction contractor in London, Ontario, provides the expertise needed to navigate these complex fire-safety regulations.
3.2.2.77: Sprinklered Industrial Buildings up to 4 Storeys
Article 3.2.2.77 outlines provisions for buildings with increased areas, provided they are equipped with a sprinkler system. These structures must be of noncombustible construction to mitigate risks associated with medium-hazard industrial operations.
Noncombustible Construction Requirements
- Building Area: Maximum areas range from 18,000 m² for 1-storey structures down to 4,500 m² for 4-storey structures.
- Fire Separations: Floor assemblies must have a fire-resistance rating of no less than 1 hour.
- Support Structures: Loadbearing walls, columns, and arches must maintain a fire-resistance rating equal to the supported assembly.
3.2.2.78: Small to Mid-Sized Industrial Buildings (Up to 3 Storeys)
For projects with a smaller footprint, Article 3.2.2.78 allows for both combustible and noncombustible construction. This provides flexibility for developers in areas like Muskoka and London where timber-based construction may be preferred for certain industrial applications.
Fire-Resistance Ratings for Combustible Builds
When utilizing combustible construction, the OBC mandates specific fire-resistance ratings to ensure occupant safety:
- Floor and Roof Assemblies: Generally require a minimum fire-resistance rating of 45 minutes.
- Mezzanines: Must be rated at 45 minutes if constructed from combustible materials.
- Roof Waiver: For 1-storey buildings, the roof assembly rating may be waived if fire-retardant-treated wood is used in accordance with Article 3.1.14.1.
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.