Final answer:
Emergency escape and rescue openings should have a sill height of not more than 44 inches above the floor.
Step-by-step explanation:
In the context of building codes and safety regulations, emergency escape and rescue openings refer to windows or doors that are designated for emergency exits in case of fire or other emergencies. According to the International Building Code (IBC), these openings should have a sill height of not more than 44 inches above the floor.