本建筑的火灾自动报警系统的保护对象为一级，同一层一个防火分区划分为一个报警区域。本建筑选用点型感烟火灾探测器。每个防火分区设置了一个手动报警按钮，布置在走廊两端、走廊中部、楼梯口等区域，靠墙安装，其底边距地（楼）面的高度为1.3～1.4m，且有明显的标志。探测器采用矩形布置，横向安装间距a为7.5m，纵向安装间距b为8m，保护直径为11.6m。一层设置消防控制室，入口设置标志，且直通室外安全出口。

关键词： 总平面防火设计；安全疏散；自动喷水灭火系统；自动报警系统

Fire System Design Of The Bank Building

In the general plan of building fire protection design, because the buil General description of the design：This design object is the business street with the total construction area of about33149.89 square meters, local of 21 layers. The 1st and 2nd floors have small shops, each shop has a small staircase connected to the upper and lower two layers. The south of 3 floor for office space, setting up an independent entrance; the north side and the local 4 layers are respectively arranged the restaurant and teahouse. The main content of the design, the general layout of the building fire design, building smoke control design, safety evacuation design, indoor and outdoor fire hydrant design, automatic water spraying fire extinguishing system design, fire configurator calculation, automatic fire alarm system design.

ding is 4 floors, belong to the multi-storey civil building, the building height of 22m, its fire resistance grade is not less than two, and the fire distance between the surrounding high-rise buildings should not be less than 9m. Also due to the commercial street along the street length is longer, so using of fire ring road, through the building fire lane width is 7m, height is 4.2m.

"Building regulations" on the multi-storey civil building fire zoning regulations, the building in the one or two, three layers of each pision of the 2 fire zone; the four layer is an independent fire zone. And because of the persity of the building function, anti smoke compartmentation pision in accordance with the independent shops, independent office, walkways for separate smoke prevention zone, restaurant, teahouse overall as an independent smoke preventing zoning; each layer of the stairs in the vertical direction for a smoke prevention zone. In addition to the third floor of the room in the corridor to setting up mechanical smoke exhaust system, the rest of the area due to open the window, it is only designed for natural smoke. The smoke exhaust fan is arranged on the roof, and the smoke exhaust fan is directly activated by the fire control signal when the fire is on. In the aisle to choose 800mm * 630mm normally open type common air shutter, the fan selected DWT- I - No. 10 axial-flow roof ventilator, Air flow rate is 24000m3/h, wind pressure 125Pa, speed 560r/min, installed capacity 1.5kw, noise 69dB (A).

In the building because of the overall level of a small shop, so there are 16 security exports. Each shop has a small staircase connected to the upper and lower two floors; the 3 side of the office area, set up a separate entrance as well as the aisle; the staircase between the use of smoke proof staircase, and with an open window. The net width of the safe exit is designed as 3m; the net width of the aisle and stairs is designed as 2m.

In order to be able to effectively put out the fire source in the early stage of the fire, the fire extinguisher collocation point is arranged in the building. The type of fire in the design site is as follows: A solid material fire and E electrical equipment fire. The building fire risk level is a serious danger. So the single fire extinguisher is the minimum configuration of fire rating is 3A, the maximum level of unit fire protection area of 50 (m2 /A). Each layer (except 4) set up 9 fire extinguisher collocation points, each set point to set up 2 portable ammonium phosphate dry powder fire extinguisher (type MF/ABC5), the maximum protection distance is 15m.