The shops, business halls and exhibition halls in the first-class and second-class fire-resistant buildings are equipped with automatic fire extinguishing systems and automatic fire alarm systems. When non-combustible or non-combustible decoration materials are used, the maximum allowable construction area of each fire zone shall meet the following requirements:
When set in a high-rise building, it should not be greater than 4000m? .
According to the Code for Fire Protection Design of Buildings, the code is GB500 16-20 14, and the code is Article 5.3. 1. The allowable building height or number of floors of buildings with different fire resistance grades and the maximum allowable building area of fire protection zones shall comply with the provisions in Table 5.3. 1
When escalators, open stairs and other openings connecting the upper and lower floors are installed in the building, the construction area of the fire zone shall be calculated by superposition of the construction areas connecting the upper and lower floors; When the building area after superposition calculation is greater than the provisions in Article 5.3. 1 of this specification, fire zones shall be divided.
Extended data
When an atrium is set in a building, the construction area of its fire partition should be calculated by superposition of the construction areas connected with the upper and lower floors; When the construction area after superposition calculation is greater than the provisions in Article 5.3. 1 of this specification, the following provisions shall be met.
The space connected with the surrounding area shall be separated by fire: when a fire partition wall is used, its fire resistance limit shall not be lower than1.00h; When using fire-proof glass wall, its fire isolation and fire integrity should not be less than 1.00h. When using non-thermal fire-proof glass wall with fire integrity not less than1.00h, an automatic sprinkler system should be set for protection.
When using fire shutter, its fire resistance limit should not be less than 3.00h, and should comply with the provisions of Article 6.5.3 of this specification; The doors and windows communicating with the atrium should be Class A fire doors, which can automatically close in case of fire.
The atrium cloister of high-rise building should be equipped with automatic sprinkler system and automatic fire alarm system.