The Ontario Building Code | Thickness
9.16.4.3. Thickness
(1) Concrete slabs shall be not less than 75 mm thick exclusive of concrete topping.
In Plain Language
A floor-on-ground must meet the minimum thickness set out in this article, ensuring adequate strength for its intended loads.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.