National Building Code Standards for Exit Signs and Stair Safety in London, Ontario
Navigating the complexities of the National Building Code of Canada is essential for ensuring the safety and compliance of any commercial or residential project. At empcontracting.ca Inc. your construction contractor in London, Ontario, we specialize in implementing these rigorous standards to keep your building occupants safe and your project up to code.
Design and Compliance for Exit Signage
According to Section 3.4.5.2 of the National Building Code, safety signs must adhere to strict design principles. This includes conforming to ISO 7010 standards for graphical symbols. Key symbols required for compliance include:
- E001 & E002: Emergency exit indicators (left and right).
- E005 & E006: 90-degree and 45-degree directional arrows.
Illumination Requirements for Exit Signs
To ensure visibility during emergencies, exit signs must be continuously illuminated. The code distinguishes between two primary types of signage:
- Internally Illuminated Signs: Must conform to CSA C22.2 No. 141 for electrical circuits or CAN/ULC-S572 for photoluminescent and self-luminous systems.
- Externally Illuminated Signs: Must conform to CAN/ULC-S572 standards.
Crucially, the circuitry for these signs must serve no other equipment and must be connected to a dedicated emergency power supply as per Article 3.2.7.4.
Placement and Accessibility Standards
Exit signs are not just required at the door; they must be visible from public corridors and principal routes in high-occupancy areas (more than 150 people). For specific locations like dance halls, licensed establishments, and Group A occupancies with low lighting, signs must be placed over every egress doorway where occupancy exceeds 60 people.
Tactile Information for Accessibility
In alignment with modern accessibility standards, exit signs must include the word “EXIT” in tactile form. These must be mounted on the approach side of exit doors to assist individuals with visual impairments, ensuring a safe path of travel for everyone.
Safety for Stairs, Ramps, and Exit Facilities
The National Building Code also mandates clear communication for stairways and ramps. In buildings exceeding two storeys, any stairway continuing past the exit level must be clearly marked to indicate it does not lead to an exit, preventing confusion during an evacuation.
Slip Resistance and Edge Demarcation
As an expert in the field, empcontracting.ca Inc. your construction contractor in London, Ontario, emphasizes the importance of Section 3.4.6.1 regarding surface safety:
- Slip Resistance: All ramp and stair surfaces must have a slip-resistant finish.
- Visual Contrast: Publicly accessible stairs require a distinctive color contrast or pattern to demarcate the leading edge of treads and landings.
- Exterior Safety: For exterior exit stairs exceeding 10 meters in height, the design must incorporate measures to remain free of ice and snow accumulation.
For professional implementation of these safety standards, trust the team that understands the technical nuances of the National Building Code.