Locks, latches, operating handles, tables, and other devices, which need to be operated in order to permit existing, shall not be located in excess of 54 inches from the finished floor. (HUD Standards: Effective July 15, 1976, to present.)3.2006 International Residential Code (IRC) Sec. 310: All emergency escape and rescue openings shall have a minimum net clear opening of 5.7 square feet. (Seeexc