【正文】
occupants and fight the fire externally, provided adequate access is provided and a window exists. The travel distances are also reduced, decreasing the time for occupants to evacuate and the fire brigade to reach the transfer of information may also increase, as occupants are relatively closer together. This increases their ability to municate with other occupants and to perceive visual and audible cues. Evacuation in buildings greater than three storeys and less than 25m This emergency strategy relies on the protection of the egress paths as well as the protection of the occupants in their partments before they evacuate. The protection of the egress paths is critical to ensure occupants are not evacuating through untenable conditions. Egress travel distances are less and therefore, the duration of occupant exposure to smoke is reduced. In a sprinkler protected building, protection is provided by: 1. The sprinkler system. 2. Compartmentation and mechanical systems. The apartments, corridors and stair shafts are remended to have a FRR of at least 30 minutes. This will protect occupants before and during egress. Selfclosers and smoke seals should be provided on all escape path doors. 3. The final level of protection is the fire brigade. In a nonsprinkler protected building the levels of protection are 2 and 3, however the following other fire safety measures will be introduced to increase the level of protection: 1. Increase FRR to at least 60 minutes to allow the plete burn out of the apartment without fire spread into the corridors or adjacent rooms. 2. Selfclosers on doors to contain the fire and smoke spread. 3. Refuge areas in stairs for disabled occupants. 4. Stair lobbies to provide two smoke and fire barriers for occupants in the stair refuge areas. Non evacuation in buildings greater than three storeys and less than 25m A nonevacuation strategy relies on protection of occupants in their apartments. There is a greaterreliance on the fire brigade to extinguish the fire and assist in the evacuation after the fire is extinguished. The fire brigade can rescue occupants externally via ladders and fight the fire externally. In a sprinkler protected building the levels of protection are: 1. The sprinkler system. 2. Compartmentation and mechanical systems. The rooms will have a remended FRR of at least 60 minutes to protect the occupants. The fire resistance rating should be designed so that the plete burn out of the apartment will not result in further fire spread. Selfclosers and smoke seals should be provided on all doors. This is to contain the fire in the apartment of origin and reduce smoke spread into other apartments. 3. The final level of protection is the fire brigade. The building alarm will be connected to the fire brigade to reduce the fire brigade response a nonsprinkler protected building the levels of protection are 2 and 3, as listed above, however the following other fire safety measures will be introduced to increase the level of protection: 1. The fire resistance rating will