IRC – is the code established in the US by the International Code Council (ICC). It is applied by the country’s jurisdictions, and internationally.
It stipulates that anyone who intends to build, alter, repair, renovate or demolish a building or structure must obtain the required building permit.
The IRC applies to the new one- and two-family dwellings and townhouses which are no taller than three stories.
It covers aspects of construction: building, plumbing, mechanical services, energy conservation, fuel gas, and electrical provisions.
We are interested in a part of the code today. Chapter 15 - Exhaust Systems. You can study the code in detail at the google request of IRC M1502