What requirement is set for smoke alarms in residential buildings?

Smoke alarms must be installed in each sleeping area to ensure the safety of occupants in residential buildings. This requirement is based on the understanding that most fires occur at night when people are asleep, and smoke alarms in sleeping areas provide an essential early warning system. By having alarms located where people sleep, they are more likely to be alerted to danger promptly, allowing for a safer evacuation. Additionally, the code often specifies that smoke alarms should be installed in hallways leading to sleeping areas and on every level of the home, including basements, to provide comprehensive coverage.

This requirement promotes a proactive safety approach in residential settings, contributing to the overall effectiveness of smoke alarms as a life-saving device. The presence of smoke alarms where people sleep increases the chances of survival in a fire situation significantly, which is why this measure is emphasized in building codes.