Q 74: what are the fire safety requirements of the isolation belt in the fire zone?

Large-scale public buildings, parks, squares and green spaces are the isolation zones of fire zones, which have important practical significance in fire fighting, emergency rescue, evacuation of personnel and materials. The layout should consider the requirements of phased construction and combination of far and near, leaving room for development. For the large-scale buildings, green spaces, parks and squares with unbalanced original layout and poor fire fighting conditions in the old city, appropriate adjustments should be made in combination with the planning, and the possibility of making full use of the original facilities and gradually improving fire fighting safety conditions should be considered to meet the requirements of fire fighting safety, emergency rescue and disaster relief and personnel evacuation.

Large public buildings in urban and rural areas should be planned and designed according to Code for Fire Protection Design of Buildings (GB 50016-2014) and Code for Fire Protection Design of Interior Decoration of Buildings (GB 50222-95). Improve the fire resistance rating of buildings on the edge of residential areas or on the street, control combustible buildings, and form fire-retardant isolation zones in urban and rural areas.

Experience and lessons have proved that in case of fire in cities, in order to prevent casualties caused by radiant heat, evacuation places (parks, green spaces and squares) should be at least 10 ha (foreign standard is above 25ha), and the maximum evacuation distance should not be greater than 3km (foreign standard is within 2km). Can also be combined with urban and rural areas, rivers, roads, set up a fire green network. Fireproof green space network is a continuous and systematic space in urban and rural areas, that is, parks and green spaces are the core, and rivers, fire forests, squares and nonflammable buildings are arranged as effective spaces for fire prevention. When disasters occur, it becomes a fire prevention network, which can cut off fires and evacuation in urban areas. The technical condition of the fire green space network is that the evacuation distance should be controlled within 2km. In order to cut off the fire, the width of the fire prevention green space network should be considered as100 ~ 300 m. The core problem of the fire prevention green space network is the refuge places composed of parks, green spaces and squares, which should have the functions of information collection, transmission, command and first aid.