The Outlined Structure of The Recommendation on Performance-Based Fire Safety Design -Chapter 4 Fire Safety of Urban Districts-

Chapter 4 Fire Safety of Urban Districts 133 Chapter 4 Fire Safety of Urban Districts 4.1 General 4.1.1Terminology 4.1.1.1Prevention of causing fire spread to othersTo take measures at the side of the building of fire origin to prevent fire spread to other buildings. Prevention of receiving fire spread from othersTo take measures at the side of the building of non-fire origin to prevent to suffer damage through fire spread from other building caught in a fire. Trunk road for urban disasterRoad that is expected to be a main route for evacuation of city residents and traffic of emergency vehicles for fire fighting, first aiding, rescue, etc., in the event of urban conflagration. Urban disaster prevention baseDistrict that is expected to serve as a base for refuge of city residents and activities for fire fighting, first aide, rescue, etc., in the event of urban conflagration, such as a large governmental or commercial district consisting of fire resistant buildings, a large park or green area etc. Fire prevention districtFire zone that is designated in urban area by the Urban Planning Law of Japan, in which high level of fire resistance performance is required to buildings by the Building Standard Law of Japan to break fire spread in the event a conflagration occurs. Semi-Fire prevention districtFire zone that is designated in urban area by Urban Planning Law of Japan, in which a certain level of fire resistance performance is required to buildings by the Building Standard Law of Japan to retard fire spread in the event conflagration occurs. Requirements for Fire Safety of Urban Districts4.2.1 Building in Fire Prevention Districts 4.2.1.1Breaking fire spread in urban districts 4.2.1.1.1A building in a fire prevention district shall not cause fire spread to other buildings in the event of fire whether the fire may be originated therein or caused by fire spread from an urban fire.134 T.TANAKA and M.KADOYA 4.2.1.1.2A building in a fire prevention district shall not be susceptible to fire spread from adjacent buildings on fire.4.2.1.2Protecting trunk roads for urban disaster prevention 4.2.1.2.1 A building in a fire prevention district designated along a major street shall not cause serious hindrance to the traffic by its collapse on the street by fire.4.2.1.2.2A building in a fire prevention district designated along a major street shall not cause a fire that seriously impedes the evacuation on the street.4.2.1.3Protecting urban disaster prevention base 4.2.1.3.1 A building in a fire prevention district that is expected to be an urban disaster prevention base shall not collapse by fire on public spaces, such as a public road or a park, to seriously spoil the function of an urban disaster prevention base.4.2.2Building in Semi-Fire Prevention Districts 4.2.2.1 Retardation of urban fire spread 4.2.2.1.1Any building in a semi-fire prevention district shall not cause fire spread easily to other buildings in the event of fire.4.2.2.1.2A building in a semi-fire prevention district shall not be susceptible to fire spread from other buildings.