OBC 2024 Plumbing Standards: Water Closet Requirements for Ontario Assembly Occupancies
Sarah's Expert Insight
OBC Compliance Specialist
"Navigating plumbing fixture counts for assembly occupancies is a critical phase in the design-build process to avoid costly delays during municipal inspections. Whether we are retrofitting a childcare center in London or developing a large-scale recreational facility in Muskoka, empcontracting.ca Inc. ensures that occupancy loads are meticulously calculated against the 2024 OBC to guarantee both legal compliance and user comfort."
Understanding Water Closet Requirements Under the 2024 Ontario Building Code
Compliance with the Ontario Building Code (OBC) is essential for any commercial or institutional project. Specifically, section 3.7.4.3 outlines the precise number of plumbing fixtures required based on occupancy type and service style. Whether you are building a drive-in restaurant or a secondary school, empcontracting.ca Inc. your construction contractor in London, Ontario ensures your project meets these rigorous standards.
Restaurant Parking Lots and Drive-In Facilities
For restaurants where patrons dine in their vehicles, the required number of water closets depends on whether employee service is provided on the lot. If employees serve food directly to vehicles, the project must adhere to Table 3.7.4.3.-H. For self-service lots, Table 3.7.4.3.-G is the governing standard.
Recreational, Educational, and Religious Institutions
The 2024 OBC defines specific fixture-to-occupant ratios for various assembly occupancies:
- Dance Halls and Recreational Establishments: 1 fixture per 100 males and 1 per 75 females.
- Schools (Elementary and Secondary): 1 fixture per 30 males and 1 per 26 females.
- Non-Residential Colleges: 1 fixture per 100 males and 1 per 75 females.
- Places of Worship and Funeral Homes: 1 fixture for every 150 persons of each sex.
- Child Care Facilities: Fixture counts must conform to the specific ratios in Table 3.7.4.3.-I.
Table 3.7.4.3.-G: Water Closet Ratios for Parking Lots
When food service by employees is not provided, the following minimums apply to parking areas:
| Number of Parking Spaces | Minimum Fixtures (Per Sex) |
|---|---|
| 1 to 20 | 1 |
| 21 to 70 | 2 |
| 71 to 105 | 3 |
| 106 to 135 | 4 |
| 326 to 375 | 10 |
| Over 425 | 12 + 1 per 50 additional spaces |
Ensure your facility is fully compliant from the start by working with the experts at empcontracting.ca Inc. your construction contractor in London, Ontario.
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.