Ontario Building Code Standards for Demountable Stages: Safety and Compliance Guide
Sarah's Expert Insight
OBC Compliance Specialist
"For large-scale events in London or seasonal festivals in the Muskoka region, the 1500mm elevation threshold for guards is a critical safety benchmark that organizers often overlook. At empcontracting.ca Inc., your construction contractor in London, Ontario, we ensure that every ramp slope and flame-resistant fabric meets these specific 2024 standards to protect both the public and the event organizers from significant liability."
2024 OBC Standards for Demountable Stage Safety
Ensuring the structural integrity and public safety of temporary installations is a priority under the Ontario Building Code. As empcontracting.ca Inc. your construction contractor in London, Ontario, we specialize in interpreting these complex regulations to ensure your event spaces are fully compliant.
Stairs, Ramps, and Handrail Dimensions
Under Section 3.17.2.2, all stairs, ramps, and handrails used for exiting a demountable stage must meet the slip-resistance and dimensional requirements of Section 3.4. A critical distinction for these temporary structures is that the maximum slope for a fixed ramp is set at 1 in 6, provided no hazard is present.
Guardrail Specifications and Fall Protection
Section 3.17.2.3 mandates that any platform with an elevation difference of more than 1500 mm from the adjacent surface must be equipped with guards at least 1070 mm high. While the audience-facing edge is exempt, other areas must meet strict safety criteria:
- Stair Guards: Minimum 920 mm high.
- Landings: Minimum 1070 mm high.
- Opening Limits: Guards must prevent the passage of a spherical object with a diameter of 535 mm.
- Structural Load: All guards must be designed to withstand Part 4 loading specifications.
Clearance and Fire Safety Protocols
To manage site density and fire risks, demountable stages must maintain a 3-meter clearance from other structures, unless located in open spaces like fairgrounds where hazard levels are low. Furthermore, any fabrics, films, or tarpaulins attached to the stage must conform to CAN/ULC-S109 or NFPA 701 flame resistance standards. Clear access for firefighting personnel must be maintained at all times.
Electrical System Security
Public safety extends to the electrical infrastructure. All equipment, including switches and fuses, must remain inaccessible to the public. In high-traffic areas, cables must be either trenched or protected by heavy-duty covers to prevent damage and tripping hazards.
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.