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OBC 9.8.4.1
Stair Riser Height
Max 200mm · Min 125mm · Uniform within flight
OBC 9.8.7.3
Handrail Height
865mm – 965mm above stair nosing
OBC 9.6.3.2
Guard Height — Exterior
Min 1,070mm where drop exceeds 1,800mm
01 — Home Search
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How high does a deck guard railing need to be in Ontario?
BuildCode AI
For residential decks in Ontario, guard height depends on how high the deck is off the ground:
1,070 mm
where walking surface is >1,800mm above grade
920 mm
where walking surface is ≤1,800mm above grade
Guards must also have no opening that allows a 100mm sphere to pass through.
OBC 9.8.8.3 · 2024 Edition
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Related
OBC 9.8.8.1
When Guards Are Required
Any surface more than 600mm above adjacent grade
02 — AI Answer
Browse OBC 2024
Ontario Building Code · Current Edition
Part 9
Part 3
Part 4
All Parts
9.8
Stairs, Ramps, Handrails & Guards
9.8.4
Stair Dimensions
9.8.7
Handrails
9.8.8
Guards
9.6
Foundations
9.10
Means of Egress
9.32
Plumbing Systems
9.36
Energy Efficiency
03 — Browse Code
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M
Mike Carpenter
Framer · Ontario
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Stair Riser Heights
OBC 9.8.4.1 · Saved 3 days ago
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Fire Separation — Party Walls
OBC 9.10.14 · Saved 1 week ago
Code Change Alerts
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Energy Efficiency — SB-12
Updated Jan 1, 2025 · OBC 9.36
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Secondary Suite Requirements
Updated Apr 1, 2025
04 — Profile & Alerts
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