Fire and Life Safety Provisions
Fire and Life Safety Provisions
The exam tests the passive and active features that buy time for escape: separation, alarms, egress, emergency escape, sprinklers, and protection of concealed spaces.
Core provisions
- Dwelling-unit separation and townhouse separation depend on occupancy and sprinkler protection. Two-family dwellings require separation between units; townhouses require rated common walls, with the rating reduced where an automatic residential sprinkler system is installed.
- Garages attached to dwellings need separation from the residence, and openings into sleeping rooms are restricted. Doors between garage and house require self-closing and appropriate fire rating.
- Smoke alarms are required in each sleeping room, outside each sleeping area, on each story, and in basements. They must be interconnected. Carbon monoxide alarms are required where fuel-burning appliances or attached garages exist.
- Means of egress requires a side-hinged door of minimum clear width, landings, stairway width, handrails, and guards. Emergency escape openings must meet the net-clear-area, width, height, and sill limits.
- Fireblocking and draftstopping limit hidden fire spread. Chimneys and fireplaces need clearance to combustibles and approved liners.
Worked example
A two-story house with a basement has one smoke alarm in the upstairs hallway. The plan fails. The code requires alarms inside each sleeping room, outside each sleeping area, on every story, and in the basement. The hallway alarm alone does not protect bedrooms with closed doors, and the basement is a separate story. The correction is to add the missing alarms and interconnect them so one activation sounds all.
Traps
Do not count a 30-in.-wide exterior door as a compliant egress door; the clear width must meet the minimum. Do not place a smoke alarm only in the hallway and call it "outside the sleeping area" if it is not adjacent to the bedrooms. Do not overlook the reduced townhouse separation rating when sprinklers are present, and do not confuse smoke alarms with carbon monoxide alarms.