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High-rise obstacle safety solutions


Aviation obstruction lights are mainly used for light identification of high-rise obstacles to provide a safety warning for aircraft. Obstacles defined as high-rise structures include: high-rise buildings, especially skyscrapers, chimneys, and similar structures, communication towers, transmission towers, and wind turbines.

The use and configuration of aviation obstruction light must be strictly in accordance with the provisions of the CAAC in China and the general requirements of other international rules. The most common international rules are the corresponding documents from ICAO (International Civil Aviation Organization) and FAA (Federal Aviation Administration).

Aviation obstruction light selection and installation key points

1.

The configuration of aviation obstruction lights should first consider the height of obstacles or buildings, and all the height of structure in meters is calculated from above of ground level.

2.

High-intensity obstruction lights are recommended on structures with a height of more than 150m.

3.

In the case of an object to be lighted, one or more low-, medium- or high-intensity obstruction lights should be located as close as possible to the top of the object. For chimney and other similar structures, the top light should be located at a sufficiently low position below the top to minimize contamination by smoke.

4.

For a large object or a group of dense objects that should be illuminated, aviation obstruction lights must be set up to indicate the basic outline of the object: the arrangement and quantity should be able to identify obstacles from each azimuth and should not be covered by any part of the obstructions.

High-rise building aviation obstruction light configuration scheme

Aviation obstruction lights set in high-rise buildings and buildings should be able to show the outline of the object from all directions. The horizontal direction can also be referenced to set obstruction lights at a distance of about 45 meters. Generally, the obstruction lights should be installed at the top of the building, and the installation height H should be from the horizontal ground.

Standard: CAAC、ICAO、FAA 《MH/T6012-2015》《MH5001-2013》

High-rise building aviation obstruction light configuration scheme pic
H ≤45 meters
One dual low intensity aviation obstruction light or low intensity aviation obstruction light at top.
45< H < 105m
2 levels obstruction lights will be needed, top with medium intensity obstruction light and middle level with low intensity obstruction light
105 ≤ H < 150m
Top with medium intensity obstruction type A light, 2nd level with medium intensity obstruction and 1 st Level with low intensity light.
H ≥ 150m
Top and 75- to 105-meter intervals install high intensity aviation obstruction lights, install medium intensity lights between high intensity aviation obstruction lights.

Chimney aviation obstruction light configuration scheme

Due to the special structure of the chimneys, the aviation obstruction light's installation should be located 1.5-3m under the top of chimney. When the height of the chimney is more than 150 meters, the obstruction light can be located within 7.5 meters under the top of the chimney.

Standard: CAAC、ICAO、FAA 《MH/T6012-2015》《MH5001-2013》

烟囱的航空障碍灯配置方案图
H ≤ 45m
Top with one layer medium intensity aviation obstruction light, and 7 color marks brush should be painted.
45＜H ≤ 105m
Chimney shall set multi-layer aviation obstruction lights, top install medium intensity type B aviation obstruction light and low intensity aviation obstruction lights at the other layers and the distance between each layer shall not be more than 45 meters and be as equal as possible.
105＜ H ≤ 150m
Chimney shall set multi-layer aviation obstruction lights, top install medium intensity type A aviation obstruction light and medium intensity aviation obstruction light at the other layers, the distance between each layer shall not be more than 45 meters and be as equal as possible.
H ≥ 150m
Multi-layer high intensity aviation obstruction lights should be installed, and distance between two layers should be 75-105m, between the high intensity obstruction lights should install the medium intensity lights.

A schematic diagram of the number of aviation obstruction lights on each layer:


Chimney each layer install aviation obstruction light quantity depends on outside diameter, refer to the following recommend quantity:

...
6m or less
3 Light units /per level
6m to 30m
4 Light units /per level
30 m to 60m
6 Light units /per level
more than 60m
8 Light units /per level

Tower aviation obstruction light configuration scheme

Towers, which are defined as tall structures, should be equipped with aviation obstruction lights to warn aircraft. All the obstruction lights allocation should be strictly in compliance with the regulations such as CAAC in China, and most common international regulations are ICAO’s and FAA’s. Installation recommendations according to tower height is shown below:

Standard: CAAC、ICAO、FAA 《MH/T6012-2015》《MH5001-2013》

铁塔的航空障碍灯配置图
H ≤ 30m
Top with 1 low intensity obstruction light
30m < H ≤ 45m
Top with 1 dual low intensity aviation obstruction light
45m < H ≤ 90m
Top with 1 medium intensity aviation obstruction light, 1/2 level install 1 low intensity aviation obstruction lights
90m < H ≤ 150m
Top with 1 medium intensity type A aviation obstruction light, 2/3 level and 1/3 level install low intensity aviation obstruction lights or medium intensity aviation obstruction lights
H ≥ 150m
Top and at intervals of 75-105 meters install high intensity aviation obstruction lights, install medium intensity lights between high intensity aviation obstruction lights
Remark: Medium intensity obstruction light type A for day use and medium intensity obstruction light type C for night use only.

Wind turbines aviation obstruction light configuration scheme

风力发电机的航空障碍灯配置方案图

Aviation obstruction light selection and installation points

1.

For wind turbines less than 150m in overall height(hub height plus vertical blade height)need install medium intensity aviation obstruction lights.

2.

For wind turbines from 150m to 315m in overall height, a second light serving as an alternate should be provided in case of failure of the operating light.

3.

In addition, for wind turbines from 150m to 315m in overall height, an intermediate level at half the nacelle height of at least three low-intensity type E lights should be provided. If an aeronautical study shows that low-intensity type E lights are not suitable, low-intensity Type A or B lights may be used.

4.

When blade rotation might block the aviation obstruction light, installation of 2 units on two sides with a distance greater than the width of the blade is required.

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© Nanhua Electronics Co., Ltd.
沪ICP备10202509号-2