OBC Requirements for Air-Supported Structures and Signage in Ontario
Sarah's Expert Insight
OBC Compliance Specialist
"In regions like London, Oakville, and Muskoka, air-supported structures are frequently utilized for seasonal sports or large events, making adherence to the 4-hour emergency air supply and 1-hour fire separation standards critical for safety and liability. At empcontracting.ca Inc., your construction contractor in London, Ontario, we prioritize these technical fire-resistance ratings and electrical protections to ensure your project passes municipal inspections without delay."
Compliance Standards for Air-Supported Structures
The Ontario Building Code (OBC) outlines specific requirements for air-supported structures, particularly regarding their attachment to other buildings and proximity to electrical hazards. According to Article 3.14.2.3, an air-supported structure can be attached to another building provided that building is under 200 m², conforms to relevant Code parts, and is either sprinklered or separated by a fire separation with a minimum 1-hour fire-resistance rating.
Fire Safety and Flame Resistance
Article 3.14.2.4 mandates a 3-meter clearance zone around the interior and exterior of air-supported structures, which must remain free of all flammable materials or vegetation. Furthermore, Section 3.14.2.5 requires that all fabrics and films meet CAN/ULC-S109 or NFPA 701 standards for flame resistance. While these fabrics are exempt from Subsection 3.1.13 flame-spread ratings for interior finishes, they must strictly adhere to propagation safety standards.
Emergency Systems and Electrical Safety
For assembly occupancies exceeding 200 persons, Article 3.14.2.6 requires a 4-hour emergency air supply system, such as an automatic generator or internal combustion engine blower. Additionally, all electrical components must be inaccessible to the public, with ground cables protected by covers or trenches to prevent damage and ensure public safety.
General Requirements for Signage
Section 3.15 governs the erection of signs across Ontario. While most structural signage falls under these provisions, Article 3.15.1.2 lists specific exceptions, including traffic regulation signs, legal notices, and railroad crossing warnings. For any commercial or residential construction involving custom signage or air-supported enclosures, consulting with empcontracting.ca Inc. your construction contractor in London, Ontario, ensures full compliance with these technical specifications.
Disclaimer: This content is generated from the Ontario Building Code for educational purposes. Always consult with a licensed professional engineer or your local building department before starting any construction project in London, Ontario.