OBC 2024 Fire Safety Standards: Requirements for Linen Chutes, Refuse Chutes, and Grease Ducts
Sarah's Expert Insight
OBC Compliance Specialist
"At empcontracting.ca Inc., we find that the 2-hour fire separation for refuse discharge rooms is one of the most scrutinized elements during inspections in London and Oakville. For our commercial clients in Muskoka, ensuring that grease ducts meet CAN/ULC-S144 standards is not just a code requirement but a critical liability protection for high-end restaurant and resort builds."
Understanding OBC Section 3.6.3: Fire Safety in Service Spaces
Compliance with the Ontario Building Code (OBC) is essential for any multi-residential or commercial project. As empcontracting.ca Inc. your construction contractor in London, Ontario, we prioritize these fire-resistance standards to ensure every build meets the rigorous safety demands of Section 3.6.3.
Linen and Refuse Chute Fire-Resistance Ratings
According to OBC 3.6.3.5., shafts containing linen or refuse chutes must maintain a specific fire-resistance rating. If the discharge outlet is protected by an automatic, self-latching closure with a fusible link, a 1-hour rating is required. However, if no closure is provided at the outlet, the rating must be increased to 2 hours.
Venting and Intake Opening Safety
The code mandates that interior chutes must extend at least 1 meter above the roofline. These must be equipped with a vent that has an unobstructed area equal to the chute’s cross-section and an automatic or manual cover for fire events. Furthermore, intake openings are restricted to 60% of the chute's cross-sectional area and must be located in dedicated rooms with a minimum 45-minute fire separation.
Sprinkler Systems and Discharge Room Requirements
Automatic sprinklers are a mandatory safety feature, required at the top of the chute, at alternating floor levels, and within the discharge room. For refuse chutes, the discharge room must have a 2-hour fire-resistance rating and be equipped with a water connection and floor drain for wash-down purposes, ensuring both hygiene and fire suppression capabilities.
Commercial Grease Duct Enclosures
For commercial cooking operations, grease duct enclosures must conform to NFPA 96 standards. The fire-resistance of these assemblies, whether field-applied or factory-built, must be determined through CAN/ULC-S144 testing to prevent catastrophic kitchen fires from spreading through the building structure.
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.