The Ontario Building Code | Flame Resistance
3.14.2.5. Flame Resistance
(1) Air-supported structures shall be constructed of material conforming to CAN/ulc-S109, "Flame Tests of Flame-Resistant Fabrics and Films", or nfpa 701, "Fire Tests for Flame Propagation of Textiles and Films".
(2) Materials for fabrics used in connection with air-supported structures are exempt from compliance with the requirements for flame-spread ratings for interior finishes in Subsection 3.1.13.
In Plain Language
Air-supported structures must be built of material certified as flame-resistant under a recognized flame-test standard, with fabric materials used in connection with them exempt from certain other material compliance requirements.
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.