How to design the installation height of aviation obstacle lights

Installation standards and classification of aviation obstacle lights

According to national standards, navigation lights must be installed in high-rise buildings with the top more than 45 meters above the ground. In order to distinguish it from general lighting, the sign lamp is not always on but flashing, and the flashing frequency is not less than 20 times per minute and not more than 70 times per minute. The specific provisions are as follows:

I. Classification of Aviation Obstacle Indicator Lights

Obstacle marker lights are generally divided into three types: low light intensity, medium light intensity and high light intensity. The vertical and horizontal distances of the obstacle lights of buildings and their facilities are more than 45 meters, so the three obstacle lights can be used together.

Buildings and facilities more than 90 meters above the ground: the light intensity obstacle sign light in use is red flashing, the flashing frequency should be between 20 and 60 times per minute, and the effective light intensity of flashing should not be less than1600 CD; Or use red high-intensity obstacle marker lamp to make its flashing effect more obvious. Buildings and their facilities above the ground150m should use high-intensity obstacle marker lights, and they must be white flashlights. The flicker frequency should be between 20 and 70 times per minute, and the effective light intensity depends on the background brightness.

Second, the installation and distribution of aviation obstacle lights

1. The setting of obstacle lights shall indicate the highest point and the most edge of obstacles (i.e. apparent height and apparent width).

2. If the top of the object is more than 45 meters above the surrounding ground, obstacle lights must be added to the middle floor, and the distance between the middle floors must not exceed 45 meters, and they should be as equal as possible (especially for super high-rise buildings in cities with a height of 100 meters or more, obstacle lights must be added to the middle floor). When installing intermediate barrier lights in buildings near cities and residential areas, consideration should be given to avoiding making residents feel unhappy. It is generally required that only escaping light can be seen from the ground.

3. Obstacle lights of buildings with wide shapes should be able to see the outline of objects from all aspects. In the horizontal direction, you can also refer to setting obstacle lights every 45 meters or so.

4. For ultra-high objects, facilities, cable towers and roof towers with a height of105m, medium-intensity A-type obstacle lights should be set at the top, with white flashing lights, and red medium-intensity B-type obstacle lights should be set at the lower part in layers.

5. Ultra-high objects (such as radio and television towers and long-span cable-stayed bridges). ) If the height is higher than150m, a high-intensity A-type obstacle lamp shall be installed at the top of it, and it shall be used together with the medium-high intensity obstacle lamp.

6. Ultra-high voltage transmission line towers should be equipped with high-intensity B-type obstacle lights, which should flash synchronously for three layers. The location is the top of the tower, the lowest point of cable sag and the middle position between them, and it should be located outside the tower along the cable routing direction.

7. For chimneys or other similar buildings, the top obstacle light must be located between 1.5-3 meters at the top. Considering the pollution of chimney to lamps and lanterns, the obstacle lamp can be installed 4-6 meters below the chimney mouth (see the extract of national standard for details).

8. No matter what kind of obstacle lights, the number and arrangement of obstacle lights with different heights should be able to see the outline of objects or groups of objects from all directions, and the synchronous flashing of obstacle lights should be considered to achieve obvious warning effect.