2018 International Residential Code

All building, plumbing, mechanical, fuel gas, and electrical requirements for single- and double-family homes as well as townhouses up to three stories are covered by this comprehensive code. The IRC has numerous significant revisions, including: When Site Class A, B, or D apply, a new seismic map displays less conservative Seismic Design Categories (SDCs). An updated seismic map displays the most conservative SDC based on any type of soil. There are now choices for using a shared wall or two separate fire-resistant-rated walls under the townhouse separation regulations. If the home has an automated fire sprinkler system and the basement has an emergency escape opening or a second means of evacuation, then the emergency escape and rescue opening is no longer necessary in basement sleeping rooms. The exclusion for connecting