OBC 2024 Signage and Plastic Face Regulations for Commercial Construction in London, Ontario
Sarah's Expert Insight
OBC Compliance Specialist
"Navigating the complexities of combustible sign faces is vital for commercial projects in the London and Oakville areas, where municipal fire safety standards are strictly enforced. As empcontracting.ca Inc. your construction contractor in London, Ontario, we recommend utilizing 200mm metal sign boxes for exterior branding, as this provides significantly more design flexibility under the OBC while ensuring the highest level of fire protection for your building's envelope."
When navigating the 2024 Ontario Building Code (OBC) for commercial developments, understanding the specific requirements for signage is essential for both compliance and safety. As empcontracting.ca Inc. your construction contractor in London, Ontario, we prioritize these standards to ensure your project passes municipal inspections without delay.
Structural Requirements and Alterations
Defining Sign Alterations
According to OBC 3.15.2.1, not every change to a sign is considered an alteration. The changing of movable parts or the repainting of display matter does not require the same permits as a structural overhaul, provided the structural integrity remains unchanged.
Structural Design Standards
Except for minor incidental signage, all sign structures must be designed in accordance with Part 4 of the OBC. This ensures that wind loads, snow loads, and seismic considerations are professionally engineered for public safety.
Plastic Sign Facing and Combustibility (OBC 3.15.4.1)
Combustible Sign Faces and Fire Safety
The 2024 OBC sets strict limits on plastic materials used in sign faces. These materials must meet specific burning rates under ASTM D635 or ASTM D3801. Furthermore, where exterior cladding is required to be noncombustible, plastic sign faces are generally limited to 30% of the wall area and must not exceed 15 square meters per sign face.
Separation and Height Requirements
For multi-storey buildings, plastic sign faces must be vertically separated by at least 1200 mm of noncombustible construction. However, an exception exists under Sentence (3): if a plastic exterior sign is mounted on a metal sign box at least 200 mm deep and attached to a noncombustible wall, the standard area and height restrictions may be waived.
Interior Signage in Public Corridors
Interior signs in walkways or corridors are restricted to 15% of the wall area. These installations must be supported by devices that do not compromise the wall's fire-resistance rating, and the edges of the plastic must be encased in metal to prevent rapid flame spread.
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.