PART 4 — STRUCTURAL DESIGNUpdated for the 2024 Ontario Building Code
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4.2.2.4.Altered Subsurface Condition
(1) If, during construction, the soil, rock or groundwater is found not to be of the type or in the condition used in design
and as indicated on the drawings, the design shall be reassessed by the designer.
(2) If, during construction, climatic or any other conditions change the properties of the soil, rock or groundwater, the
design shall be reassessed by the designer.
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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.