Occupancy classifications are the foundation of everything in the building code. In this episode, Layla walks you through all 10 IBC occupancy groups, from Assembly to Utility, and explains how each one affects building design, fire protection, egress, and life safety.

We break down what makes each occupancy group unique with real-world examples that show why classification matters. You'll learn the 50-person rule that separates Assembly from Business, why colleges are Group B and not Group E, and how mixed-use buildings handle multiple occupancies under one roof.

Whether you're studying for the ARE or just trying to make sense of IBC Chapter 3, this is your starting point for understanding how the building code categorizes every space we design.

📝 Key Topics Covered: - All 10 IBC occupancy groups (A through U) with examples - How occupancy classification drives height, area, egress, and fire protection - The 50-person rule: when a space flips from Business to Assembly - Mixed-use buildings: separated vs non-separated occupancies - Where occupancy questions show up on the ARE exam

⏱️ Chapters: (0:00) Intro to Occupancy Classifications (2:00) What are Occupancy Classifications? (3:17) How Occupancies Affect Building Design (5:14) Tour of Major Occupancy Groups (11:52) Real-World Examples and Scenarios (13:10) Mixed-Use Buildings (14:02) Common Misconceptions (15:25) Conclusion and Key Takeaways

📖 Read the full blog post: https://academy2.youngarchitect.com/occupancy-classification

📝 Download the free Occupancy Classifications study notes: https://youngarchitect.com/occupancy

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