OBC 9.20.5.2: Steel Lintel Span & Bearing Standards for Masonry in Ontario
Sarah's Expert Insight
OBC Compliance Specialist
"As your construction contractor in London, Ontario, empcontracting.ca Inc. highlights that the 150mm bearing requirement is often overlooked in residential renovations, leading to unsightly masonry cracking. In moisture-prone regions like Muskoka or high-wind areas in Oakville, we ensure all lintels receive premium corrosion protection to withstand Ontario's intense freeze-thaw cycles and prevent structural degradation."
Compliance with OBC Section 9.20.5.2 for Steel Lintels
As a leader in structural integrity, empcontracting.ca Inc. your construction contractor in London, Ontario, strictly adheres to the 2024 Building Code Compendium. Section 9.20.5.2 dictates the maximum allowable spans and installation requirements for steel lintels supporting masonry veneer, ensuring that every opening is safe and durable.
Maximum Allowable Spans for Steel Lintels (Table 9.20.5.2.-B)
The code provides specific allowable spans based on the size of the steel angle and the type of masonry being supported. For example:
- 89 x 89 x 6.4 mm Angle: Supports 70 mm brick up to 2.59 m and 100 mm stone up to 2.30 m.
- 152 x 89 x 11 mm Angle: Supports 90 mm brick up to 3.82 m.
- 178 x 102 x 13 mm Angle: Supports 90 mm brick up to 4.59 m.
Critical Installation Standards
According to Sentence 9.20.5.2.(3.1), all steel lintels must have an even and level bearing. They are required to have no less than 150 mm length of bearing at end supports. Furthermore, these lintels must bear directly on masonry, concrete, or steel. This prevents localized crushing and ensures long-term stability of the facade.
Corrosion Protection and Beam Support
In the Ontario climate, corrosion protection is mandatory. Sentence (4) requires all steel angle lintels supporting masonry to be prime painted or otherwise protected. Additionally, for steel beams supporting masonry veneer and wood stud walls, a minimum 6 mm plate must be welded to the flange to provide adequate support for the veneer, and the beam must be supported by steel columns at each end.
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.