IBC (International Building Code)
The model building code for commercial, institutional, and multi-family residential buildings over 3 stories. More complex than the IRC with engineered performance requirements.
In Detail
The IBC covers all buildings not within IRC scope: commercial, multi-family (4+ units), buildings over 3 stories, and mixed-use. It requires professional engineering for most structural elements. Published by ICC alongside the IRC on the same 3-year cycle.