MarkhamBuilding InspectionsInspections

Staggered Townhouses 45 Minute Fire Resistance Rated Wall

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: Staggered Town Housings 45 Minute Fire-Resistance Rated Wall
For: builder
Building types: All building types
Pages: 3
Instruments: MMAH Supplementary Standard SB-2 · MMAH Supplementary Standard SB-3 · CAN/ULC-S134

Overview

For staggered townhouses, Markham's Builder Tip Issue No. 42, dated January 1, 2025 and listed as Staggered Town Housings 45 Minute Fire-Resistance Rated Wall among the City's 2024 Ontario Building Code housing tips. It quotes Article 9.10.3.1. on Part 3, SB-2 and SB-3 ratings and Sentences 9.10.15.5.(1), (1.1) and (2) on exposing building faces and cladding at limiting distances under 0.6 m. The Objective cites SB-2 for the 45 minute and header ratings, names labelled vinyl siding over 12.7 mm exterior gypsum sheathing, and refers to Builder Tip No. 40.

What it covers

9.10.3.1 Fire-Resistance and Fire-Protection Ratings
9.10.15.5. Construction of Exposing Building Face of Houses
Objective

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