MarkhamBuilding InspectionsInspections

Wired Glass Assemblies (Max 1 Hour Rated)

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
For: designer
Building types: All building types
Pages: 3
Instruments: NFPA 80, Standard for Fire Doors and Other Opening Protectives · MMAH Supplementary Standard SB-2, Fire Performance Ratings

Overview

Markham's Builder Tip No. 51, dated January 1, 2025, on wired glass screens in fire separations rated 1 hour or less, one of the City's non-housing tips under the 2024 Ontario Building Code. It quotes Subsection 3.1.8. and Article 3.1.8.16. on wired glass and glass block under NFPA 80, and Article 2.3.15. of SB-2 on 6 mm wired glass, mesh sizes, steel frames, 0.84 m2 panes and the 7.5 m2 limit between mullions. Its objective describes grout-filled HSS mullions and screens that also act as guards.

What it covers

3.1.8. Fire Separations and Closures
3.1.8.1. General Requirements
3.1.8.16. Wired Glass and Glass Block
Supplementary Standards – SB-2 – Fire Performance Ratings
2.3.15. Wired Glass Assembly Support
Objective

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