The Ontario Building Code | End Bearing for Joists
9.23.9.1. End Bearing for joists
(1) Except when supported on ribbon boards, floor joists shall have not less than 38 mm length of end bearing.
(2) Ribbon boards referred to in Sentence (1) shall be not less than 19 mm by 89 mm lumber let into the studs.
In Plain Language
Joists need adequate end bearing as set out in this article, ensuring proper support where they rest on a wall, beam, or ledger.
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.