Toronto Fire Rated Glass Solutions Certified for Ontario Building Code Compliance

Toronto’s commercial and high-rise building sectors operate under stringent fire safety regulations, demanding fire rated glass solutions that meet the exacting standards of the Ontario Building Code (OBC) 2024. For architects, specifiers, and general contractors in the Greater Toronto Area (GTA), compliance is not optional—it is a legal and safety imperative. Antifires provides a comprehensive range of fire rated glass, fire doors, and fire windows that are certified to ULC S101 (Standard Methods of Fire Endurance Tests of Building Construction and Materials) and ULC S104 (Standard Method for Fire Tests of Door Assemblies). These certifications are the recognized benchmarks for demonstrating compliance with OBC Division B, Part 3 (Fire Protection, Occupant Safety and Accessibility) and Part 9 (Housing and Small Buildings). The city’s diverse building stock—from Yonge Street corridor mixed-use towers to heritage façades—requires localized expertise. Antifires’ ULC-listed systems, including integrity-only (E) and combined integrity and insulation (EI) ratings, ensure that Toronto projects achieve the required 45-minute, 60-minute, 90-minute, or 120-minute fire resistance ratings. For official regulatory guidance, refer to the Ontario Ministry of Municipal Affairs and Housing Building Code.

Ontario Building Code 2024 Fire Protection Requirements for Toronto High-Rise Enclosures

Toronto’s high-rise residential and commercial towers must adhere to OBC Division B, Part 3, which mandates fire separations to contain flames and smoke. For corridor and stairwell enclosures, glazing must meet specific fire resistance ratings (FRR) to ensure safe egress. Antifires supplies fire rated glass systems that comply with ULC S101 and ULC S104, providing certified performance for 45-minute (E45), 60-minute (E60), 90-minute (E90), and 120-minute (EI120) applications. These ratings are critical for enclosures where integrity (E) prevents fire penetration, and insulation (I) limits heat transfer to protect evacuation routes. For example, a 28mm EI60 panel, tested to BS EN 1634-1, demonstrates integrity for 66 minutes and insulation for 64 minutes, making it suitable for Toronto’s high-rise stairwells. The systems feature G.M.S. hollow steel frames with intumescent seals and ceramic wool, ensuring a robust barrier against thermal stress. Key applications include:

  • Corridor glazing: E60 to E90 ratings for smoke and flame containment.
  • Stairwell enclosures: EI60 to EI120 for insulated fire separations.
  • Elevator lobbies: Integrity-only systems for cost-effective compliance.

ULC Classified Fire Rated Glass Grades for Toronto’s Extreme Temperature Fluctuations

Toronto’s climate, with temperature swings from –30°C in winter to 35°C in summer, presents unique challenges for fire rated glazing. Thermal shock resistance is essential to prevent glass failure under extreme temperature differentials. Antifires offers two primary glass grades for these conditions: polished wired glass and transparent ceramic fire rated glass, both ULC classified. Polished wired glass provides a cost-effective solution for 60-minute integrity ratings, while ceramic glass delivers superior thermal stability for 90-minute and 120-minute applications. For exterior curtain walls and interior vision panels, the 21mm FPOS multi-layer composite structure (tested to BS 476 Part 22) achieves integrity for 120 minutes and insulation for 30 minutes, withstanding rapid temperature shifts without cracking. The glass composition includes intumescent gel layers that activate at high temperatures, forming a rigid insulating barrier. Key performance characteristics:

Glass TypeIntegrity (min)Insulation (min)ULC Listing
6mm E9090N/AYes
10mm FPOS13516Yes
28mm EI606664Yes

Toronto Mixed-Use Developments and Heritage Façade Retrofit Demands for Fire Rated Systems

Toronto’s Yonge Street corridor mixed-use developments and heritage building retrofits require fire rated glazing that balances modern safety codes with architectural preservation. For heritage façades, Antifires supplies custom fire door systems and fire windows that replicate historic aesthetics—such as steel-framed vision panels—while meeting ULC fire separations. These systems use 26mm glazed door glass (5mm + 5.5mm gel + 5mm + 5.5mm gel + 5mm), tested to BS 476 Part 22, achieving integrity for 89–90 minutes and insulation for 68 minutes. This ensures compliance with OBC Part 3 for new atrium enclosures and corridor separations without compromising the building’s original character. For mixed-use towers, the 50mm/54mm ultra-high-performance glass (EI120) provides 120-minute integrity and insulation, ideal for large-span curtain walls and fire-rated partitions. Installation involves:

  • Heritage window replacements: Custom frame profiles with ceramic tape seals.
  • Atrium enclosures: Multi-layer insulated glass for thermal and fire performance.
  • Corridor glazing: 15mm FPOS for 132-minute integrity in high-traffic zones.

Antifires Local Warehousing and Ontario Code Expertise for Toronto General Contractors

Antifires supports Toronto general contractors and glazing contractors with a local distribution hub in the GTA, ensuring 3–5 day delivery for fire rated glass and fire doors. This reduces project delays and logistics costs, critical for fast-paced commercial builds. The technical team provides OBC-compliant submittal packages, including ULC certification documentation, shop drawings, and installation guides. For on-site support, Antifires offers training on frame assembly, sealant application (ceramic wool, density 210 kg/m³), and anchor bolt spacing (M6/M8, 300–600mm). Key services include:

  • Submittal packages: ULC S101 and S104 test reports for building permits.
  • Installation support: Expansion gap guidelines (3–5mm) with ceramic fiber fill.
  • Product selection: Matching fire partition solutions to project FRR requirements.

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Frequently Asked Questions (FAQ)

Yes, Antifires fire rated glass carries ULC listing recognized by the Ontario Building Code (OBC). All products are tested to ULC S101 (Fire Endurance Tests) and ULC S104 (Door Assemblies), which are the accepted standards for demonstrating compliance with OBC Division B, Part 3 fire separations. For example, the 28mm EI60 panel is ULC-listed for 66-minute integrity and 64-minute insulation, meeting the requirements for corridor and stairwell enclosures. Antifires provides full certification documentation, including test reports and listing numbers, for building permit submissions in Toronto.

Under OBC Part 3, Toronto commercial corridor glazing typically requires a 45-minute fire resistance rating (FRR) for integrity (E45) in sprinklered buildings. For unsprinklered buildings or specific egress paths, a 60-minute (E60) or 90-minute (E90) rating may be mandated. Antifires supplies ULC-listed systems, such as 6mm E90 glass (90-minute integrity) and 10mm FPOS (135-minute integrity), to meet these requirements. The exact rating depends on the corridor’s location, occupancy load, and building height—always consult the local authority having jurisdiction (AHJ) for project-specific compliance.

Yes, Antifires provides fire rated glass with thermal break capabilities suitable for Toronto’s extreme winter climate. The 21mm FPOS multi-layer composite glass (120-minute integrity, 30-minute insulation) is designed to withstand thermal shock from –30°C to 35°C cycles. For exterior curtain walls, the 50mm/54mm ultra-high-performance glass (EI120) includes insulated frames with ceramic tape seals (3–6mm, density 210 kg/m³) to minimize heat loss. These systems are tested to ASTM E119 and ULC S101, ensuring structural integrity under temperature fluctuations. Antifires offers thermal performance data and ULC certification for all exterior-rated glazing.