The maximum amount of smoke detector structural beam installed on the ceiling cannot be exceeded

Generally, the diameter of the hole is about 30 cm.

In places with suspended ceilings, the sprinkler heads are arranged under the ceiling, and they can be arranged at a certain distance and equal distance according to the danger level of the building. The sprinkler head is available in a droop type or a ceiling type. In places without suspended ceilings, spray on the sprinkler.

In addition to arranging according to a certain spacing, the influence of beams or other obstacles should also be considered, and the design code section "the distance between the sprinkler head and the obstacle" has been specified in detail.

Article 1 of the design code stipulates that in addition to the sprinkler head installed under the ceiling, the distance between the splash tray and the roof of the upright and drooping standard sprinkler head shall be 75mm and 150mm. It further specifies the layout requirements in several cases:

1. When the sprinkler head is arranged on the plane below the bottom surface of the beam or other obstacles, the distance between the splash tray and the top plate should be 300mm, and the vertical distance between the splash tray and the bottom surface of the beam and other obstacles should be 25mm and 100mm.

2. When the sprinkler head is arranged between the beams, it should comply with the provisions of this specification. When there is real difficulty, the distance between the splash tray and the top plate should be 550mm. When the sprinkler head arranged between the beams, and the distance between the sprinkler splash tray and the roof reaches 550mm, the sprinkler head should be added below the bottom surface of the beam.

3, the sprinkler head below the ribbed beam plate, the vertical distance between the splash tray and the bottom surface of the ribbed beam plate should be 25mm, and the clearance height should not exceed 8m in the place, and the spacing should not exceed 4m 4m The cross beam arranged by 4m can be arranged between the beams 1

According to the "Code for the Design of Automatic Fire Alarm System" (GB50116-98), when the detector is set on the roof of the inner walkway with a width of less than 3m, it is arranged in livable. The installation distance of the temperature detector should not exceed 10m; The installation distance of smoke detectors should not exceed 15m; The distance from the detector to the end wall should not be greater than half of the installation spacing.

National Standards of the People's Republic of China.

Code for construction and acceptance of automatic fire alarm system.

gb 50166—92

Section 3 Installation of fire detectors.

Article The installation location of the point fire detector shall comply with the following provisions:

1. The horizontal distance from the detector to the wall and beam should not be less.

2. There should be no obstruction around the detector.

3. The horizontal distance from the detector to the air supply outlet of the air conditioner should not be less than; The horizontal distance to the orifice of the porous air supply roof should not be less than.

4. When the detector is set on the roof of the inner walkway with a width of less than 3m, it should be arranged in livable. The installation distance of the temperature detector should not exceed 10m; The installation distance of smoke detectors should not exceed 15m; The distance between the detector and the end wall should not be greater than half of the detector installation distance.

5. The detector should be installed horizontally, and when it must be installed at an angle, the tilt angle should not be greater than 45°.

The installation position of the fire detector shall not be less than 50mm The installation position of the point-type fire detector shall comply with the following provisions: The horizontal distance between the detector and the wall and the beam side of the sedan shall not be less than; There should be no obstruction around the detector; The horizontal distance from the detector to the air conditioning tuyere is not less than the horizontal distance from the orifice of the porous air supply roof.

It cannot be installed on a beam and is not easy to form an effective smoke concentration.

Smoke Detector Installation Requirements:

1. The horizontal distance between the smoke detector and the wall and beam should not be less;

2. There should be no obstruction within the horizontal distance around the smoke detector;

3. The horizontal distance between the smoke detector and the broadcast should not be less than;

4. When the detector is installed on the roof of the inner walkway with a width of less than 3m, it is installed in the habitable environment. The installation spacing of point-type temperature sensing fire detectors should not exceed 10m; The installation distance of point-type smoke fire detectors should not exceed 15m. The distance from the detector to the end wall should not be greater than half of the installation spacing.

5. The horizontal distance between the smoke detector and the air supply port of the air conditioner should not be less than, and should be installed close to the return air outlet, and the horizontal distance from the detector to the orifice of the porous air supply ceiling should not be less than.

6. The horizontal distance between the smoke detector and the lamp should not be less than;

7. The horizontal distance from the smoke detector to the nozzle should not be less than;

8 When the room is separated by bookshelves, equipment or partitions, and the distance from the top of the room to the ceiling or beam is less than 5 of the clear height of the room, at least one detector should be installed in each separated part.

9. The distance between the smoke detector and the water boiler should not be less than.

The merchant is required to change out, the probe and sprinkler head must be exposed to the ceiling, what is the use in the ceiling The fire temperature and smoke probe cannot be closed in the ceiling, you can ask the property to remove the probe and use a slipknot.

Design code for automatic fire alarm system.

When the height of the beam protruding from the ceiling exceeds 600mm, at least one detector should be set up in each area between the beams that are separated by the beam.

When the net distance between beams is less than 1m, the influence of beams on the protection area of the detector can be disregarded.

No, it can be mounted on the beam, but the beam height cannot exceed 60cm.