2021 International Residential Code for 1 & 2 Family Dwellings, Tabbed & Highlighted

This comprehensive code comprises all building, plumbing, mechanical, fuel gas and electrical requirements for one- and two-family dwellings and townhouses up to three stories. The 2021 IRC® contains many important changes such as:

• Braced wall lines must be placed on a physical wall or placed between multiple walls.


• The rated separation for two-family dwellings is 1 hour whether or not a lot line exists between units.


• Emergency escape and rescue openings require a clear 36-inch-wide path to a public way.


• An engineered design is required for storm shelters.


• A habitable attic is limited to one-half the area of the story below and the dwelling requires sprinklers.


• Updated Wind Speed maps match IBC and ASCE 7 maps.


• Deck design now considers snow load, tributary area for footing and post height, and guard details.


• Specific requirements for deck guardrails were added.


• Component and cladding wind pressures in Table R301.2(2) are updated for new design wind speeds and hip or gable roof profiles.


• Minimum footing size tables are revised to more accurately reflect current practice…….and more