The Ontario Building Code | Service Rooms under Exits
3.6.2.2. service Rooms under Exits
(1) A service room containing service equipment subject to possible explosion, such as boilersoperating in excess of 100 kPa (gauge) and some types of refrigerating machinery and transformers, shall not be located directly under a required exit.
In Plain Language
A service room containing equipment that could explode, like high-pressure boilers or certain refrigeration machinery and transformers, can't be located directly beneath a required exit, protecting the escape route from a catastrophic equipment failure below.
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.