International Residential Code 2018

The International Residential Code (IRC) is a comprehensive guide covering all building, plumbing, mechanical, fuel gas, and electrical requirements for single-family and two-family homes, as well as townhouses up to three stories. This essential resource includes key updates from IRC 2018 and IRC 2021, making it a vital reference for residential construction professionals.

Key revisions in this edition include:

• A newly updated seismic map that introduces less conservative Seismic Design Categories (SDCs) for Site Class A, B, or D.
• A revised seismic map displaying the most conservative SDC based on any type of soil.
• Enhanced townhouse separation regulations, offering the option of a shared wall or two separate fire-resistant-rated walls.
• Revised emergency escape requirements: If a home is equipped with an automated fire sprinkler system and the basement includes an emergency escape opening or a second means of evacuation, basement sleeping rooms no longer require a separate emergency escape and rescue opening.
• Additional exclusions for specific connection requirements.

With its clear guidance and the latest regulatory updates, the International Residential Code remains an essential tool for ensuring safety and compliance in residential construction.