OBC Group F Division 3: Industrial Building Standards and Fire Safety Regulations
Sarah's Expert Insight
OBC Compliance Specialist
"Navigating the complexities of Group F, Division 3 occupancy is crucial for industrial developments in London and Oakville to maximize floor area while maintaining strict safety compliance. At empcontracting.ca Inc. your construction contractor in London, Ontario, we emphasize that strategic street-facing orientation and 45-minute fire-resistance ratings are the most cost-effective ways to optimize these low-hazard industrial projects without compromising on structural integrity."
Understanding Group F, Division 3 Under the 2024 Ontario Building Code
Industrial construction in Ontario requires a deep understanding of occupancy classifications. Group F, Division 3 covers low-hazard industrial occupancies, where the building area and height are strictly regulated based on fire protection measures and street access.
Section 3.2.2.86: Sprinklered Buildings up to 4 Storeys
For sprinklered buildings, the OBC allows for combustible or noncombustible construction. However, strict area limits apply: a 1-storey building can reach 14,400 m², while a 4-storey structure is limited to 3,600 m². At empcontracting.ca Inc. your construction contractor in London, Ontario, we ensure these floor assemblies and mezzanines meet the mandatory 45-minute fire-resistance rating to ensure full compliance.
Section 3.2.2.87: Area Limits and Street Access
When buildings are limited to 2 storeys, the maximum building area is dictated by Table 3.2.2.87. For example, a 1-storey building facing three streets can expand to 2,400 m². Loadbearing walls, columns, and arches supporting rated assemblies must have a fire-resistance rating of at least 45 minutes or be constructed of noncombustible materials.
Fire-Retardant-Treated Wood and Structural Support
As per article 3.2.2.85, using fire-retardant-treated wood roof systems conforming to Article 3.1.14.1. allows for specific building area allowances. Regardless of the material, the structural integrity of loadbearing components remains a priority to protect the facility and its occupants.
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.