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The main content of the design include: ① building fire rating classification and description of the calculation and description. ② construction general layout and graphic design fire. ③ building safe evacuation design calculations. ④ indoor and outdoor fire hydrant system to calculate and explain. ⑤ sprinkler system to calculate and explain. ⑥ Extinguisher calculation and description. ⑦ building smoke control design, calculation and description. ⑧ automatic fire alarm system design and description.
This design object is low, multi-buildings, fire resistance rating of 2.Design objects from the surrounding buildings and 9m, distance13m, set fire road building around the ring between high-rise buildings within the project.
Building plan according to the structure and use of fire-resistant design and the corresponding specification of the building, will be pided into one building each fire district. One to three-story building is pided into a total of 10 smoke partitions, one four, two three all three.
Safe evacuation route is the room→Aisle→Stairwell. Each fire district is located in two evacuation ports, aisle width of 2.2m, two emergency exit distances greater than 5m, safe evacuation distance of 12.7m.
Safe evacuation route for the room → walkway → stairwell. Each fire district located in four evacuation port, walkway width of 2.1m, four security exit distance greater than 5m, the maximum safe evacuation distance of 17.8m, safe evacuation time was 2.6min.
Hazard level design objects for light risk level, the main types of fire A fire, the presence of E class fire simultaneously. Design configuration ammonium phosphate dry powder portable fire extinguishers (MF/ABC1), Maximum protection distance of 25m. One set point number is four, two three-set number of points to three. Then layer each configuration point configuration 2 with MF/ABC1 extinguishers (1kg ammonium phosphate portable fire extinguishers), two three-point each configuration of the configuration 3 with MF/ABC1 extinguishers (1kg ammonium phosphate portable fire extinguishers).
Design calculations Fire Hydrant system includes outdoor and indoor fire hydrant system two parts. Outdoor fire hydrant water for the 20L/s, set three outdoor low-voltage ground Hydrant. Fire hydrant water for the 10L/s, hydrant protection radius 28.1m, arrangement pitch 26.9m, buildings were set four risers. Total head loss 0.095MPa, the elevation difference between the most negative point Z hydrant and fire pond lowest water level is 15.6mH2O. The most unfavorable hydrant working pressure P0 is 0.2054MPa. Fire pump required head 46m, flow 15.92L/s, choose XBD5.5/20-100 type fire pump, one Taiwan, the fire pump head 55m, flow 20L/s, speed 2900r/min, power 22KW, use one with a equipment, set fire pump adapter Taiwan. Set up a fire-fighting, the effective volume of 119m3.
Automatic sprinkler systems use wet automatic sprinkler system. According to the specification, determine it belong to the dangerous level. Use square nozzle arrangement designed to determine the position and shape after the most unfavorable point action area is calculated at a point within the area of the most unfavorable effect of several nozzles 12, the role of area 192m2, the most unfavorable point nozzle of the flow
64L/（min • m2）. Pipeline total loss 0.1145MPa, the elevation difference between the most negative point of the nozzle and the lowest level of fire water 15.6mH2O, the most unfavorable point nozzle working pressure 0.064MPa, spray pump required head 33.4m, flow 12.59L/s, choose XBD4/15-80 type fire pump, one Taiwan, the fire pump head 40m, flow 15L/s, speed 2900r/min, power 7.5KW, use one with a prepared, to meet the demand. Share fire-water pond with fire hydrant water supply system, fire-fighting total effective volume of 210 m3.
Design of buildings for anti-smoke, this building uses natural ventilation facilities should be smoke.
Automatic fire alarm system design using regional alarm system, and set the fire control room. Design choice smoke detectors, each layer is pided into two detection unit, the detector protection area A=60m2, protection radius R=5.8m. Number detector arrangement, a layer 26, the second floor 16, three 35, 75 basement.