An inner room is simply a room that is reached through another living area known as an access room or outer room they pose a threat to life because a fire in the access room can seriously impede escape from the property.
Room within a room fire regs.
For example a 2000 square foot assembly room at a school could accommodate 100 students based on square footage alone.
If that room only has a single exit the international building code limits occupancy to 50 people to make it more likely that everyone in the room will have time to exit if a fire takes hold.
Building a new wall to subdivide a room or create a new room can affect the means of escape from fire.
They outline the set of fire safety standards a building must meet by law.
If in doing so a situation is created whereby the route for leaving an existing or new room is only possible through another room then an egress escape window from the existing or new room inner room will be needed as well as possibly one or more smoke alarms.
Building regulations for fire escape windows.
Here in conjunction with bre we review the current regulations.
When it comes to inner rooms approved document b suggests they may be allowed if suitable fire suppression systems are installed.
Building regulations adb.
To bedrooms but not bathrooms.
Inner bedrooms are particularly dangerous as an inhabitant may be deeply asleep and perhaps even under the influence of alcohol when a fire starts in the outer.
Although the hospitality industry has sharpened up its fire safety act over the last 30 years hotel fires still cause death and injury.