What is the City of Chicago Code For Exit Signs?Chicago Approved Exit Signs must meet a specific rules and guidelines. The letters in the word "EXIT" must be 6" inches tall with a 3/4" stroke. Directional arrows or chevrons are beneath the EXIT and are the same width as the lettering. The wording EXIT must illuminate in RED. Our signs feature a long lasting energy efficient LED Lamp a UL listed 90 minute battery backup. Our City of Chicago exits are constructed with durable 20 gauge steel housings. Rest assured all of our Chicago Approved Exit Signs at Exit Sign Warehouse are fully code compliant and inspector approved. Exit Sign Warehouse Chicago exits series meets American Recovery and Reinvestment Act of 2009 (ARRA) requirements and Buy American provisions! Don't take chances not passing a fire inspection go with the City of Chicago approved exit signs.