The Ontario Building Code | Support of Tail and Header Joists
9.23.9.7. support of Tail and Header joists
(1) When tail joists and header joists are supported by the floor framing, they shall be supported by suitable joist hangers or nailing in accordance with Table 9.23.3.4.
In Plain Language
Tail joists and header joists around a floor opening need adequate support as set out in this article, ensuring the modified framing around the opening still safely carries its load.
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.