The Ontario Building Code | Fatigue
4.1.3.3. Fatigue
(1) A building and its structural components, including connections, shall be checked for fatigue failure under the effect of the cyclical loads, as required in the standards listed in Section 4.3.
(2) Where vibration effects, such as resonance and fatigue resulting from machinery and equipment, are likely to be significant, a dynamic analysis shall be carried out.
In Plain Language
A building and its structural components, including connections, must be checked for fatigue failure under cyclical loading per the referenced standards, and a dynamic analysis is required where vibration effects like resonance are likely significant.
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.