Part 3 - Classification and Construction
Mon, Nov 03
|OBOA Boardroom
Time & Location
Nov 03, 2025, 8:00 a.m. – Nov 07, 2025, 5:00 p.m.
OBOA Boardroom, 5045 Orbitor Dr Building 11 - Unit 100, Mississauga, ON L4W 4Y4, Canada
About the event
Course Description:
This technical course has been designed to help code practitioners to consider the important elements of a structure regulated by Part 3 Large buildings including mid-rise construction. This is an introduction to part 3 buildings and includes the following: building classification; separation of major occupancies; building area and height; streets; building size and construction; occupant load; fire separation/fire-resistance ratings; fire protection ratings; firewalls; closures; Ontario Building Code requirements; fire stopping; fire blocking; provisions for fire fighting; and mezzanines and interconnected floor spaces.
Objectives of this course:
· Recognize and explain key terms related to building classification.
· Differentiate between subsidiary occupancies and major occupancies.
· Determine the major occupancy alphanumeric classification(s) of a building as well as its subsidiary occupancies.




