In Part 2 of our look at residential stairways, we look at several of the rules for stairs from the International Residential Code (IRC). How wide, headroom, risers, treads and more are in here. I will cover the most common rules that come up on inspections (for complete coverage of the topic feel free to visit Section R311.7 of the IRC). Be sure to catch Parts 1 and 3 for additional info about stairways.