The Ontario Building Code | Service Lines under Buildings
3.2.3.21. service Lines under buildings
(1) A building shall not be constructed over an existing buried flammable gas main unless the gas main is encased in a gas-tight conduit in conformance with CAN/CSA-Z662 / Z662.1, "Oil and Gas Pipeline Systems / Commentary on CAN/CSA-Z662-11, Oil and Gas Pipeline Systems".
3.2.4. Fire Alarm and Detection Systems
In Plain Language
This clause closes out Subsection 3.2.3 by addressing any remaining specific building configurations (such as unusual site conditions or existing building expansions) not directly covered by the general spatial separation rules earlier in the Subsection.
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.