MarkhamBuilding InspectionsInspections
Reduction In Thickness Of Fire Separation By Beams And Joists
Published by City of Markham
This is the City of Markham’s document, as published on its website on 18 October 2026. The municipality may have changed it since: check the current version at the source. Legal notice
- Type
- Guide
- Published by
- City of Markham
- Date
- January 1, 2025
- Also called
- Reduction in Thickness of Fire Separation by Beams and Joists
- For
- builder
- Building types
- All building types
- Pages
- 3
- Instruments
- MMAH Supplementary Standard SB-2, Fire Performance Ratings
Overview
Builder Tip No. 74 of the City of Markham, dated January 1, 2025, filed with the City's housing tips under the 2024 Ontario Building Code. It quotes Article 9.10.9.11. on beam and joist pockets in masonry or concrete fire separations, and Article 2.2.1. of the 2012 Supplementary Standard SB-2 on minimum equivalent thickness. Its objective works through back-to-back beams bearing on an 8 inch block or poured party wall, where 90 mm bearing leaves 25 mm of wall, and a steel bearing plate that keeps the 1 hour rating.
What it covers
- 9.10.9.11. Reduction in Thickness of Fire Separation by Beams and Joists
- 2012 Supplementary Standard SB-2
- 2.2.1. Minimum Equivalent Thickness for Fire Resistance Rating
- Objective
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