IRC R310 and Window Sill Height Rules in Maryland
How IRC R310 Uses Window Sill Height To Protect Occupants The purpose of IRC R310 is simple: if someone has to get out fast, or firefighters have to get in, the opening must be reachable and usable without special tricks or tools. A window can look perfectly normal from the street and still fail the code inside if the opening starts too far up the wall. In practice, this issue shows up a lot during residential window replacement Bethesda MD projects, especially in