Provide a fire escape route leading in all of the buildings at least a 2 floor evacuation routes, which can be employed to work at the same time, all in less than 5 minutes.
Provide all fire escape routes at the top floor of the building at least two evacuation routes, which can be employed at the same time, all in less than 5 minutes.
The line of fire every floor of a building at least I two directions, which can be evacuated employees who work at the same time, all within a time limit. Five minutes.