The Ontario Building Code | Group F, Division 3, 1 Storey, Any Area, Low Fire Load Occupancy
3.2.2.82. Group F, Division 3, 1 Storey, Any Area, Low Fire Load Occupancy
(1) A building classified as Group F, Division 3 is permitted to conform to Sentence (2) provided it is,
(a) not more than 1 storey in building height,
(b) used solely for low fire load occupancies such as,
(i) power generating plants, or
(ii) plants for the manufacture or storage of noncombustible materials, and
(c) not limited in building area.
(2) The building referred to in Sentence (1) shall be of noncombustible construction.
In Plain Language
A 1-storey Group F, Division 3 building used solely for low fire-load occupancies, like power plants or noncombustible-material manufacturing/storage, can have unlimited area provided it's built of noncombustible construction.
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.