OBSTRUCTION lIGHT FOR TELECOMMUNICATION & RADIO TOWERS

Telecommunications & Radio Towers are, typically,tall structures designed to support antennas for telecommunications and broadcasting, including television. They are among the tallest man-made structures.

Basic Rule

• The number of light levels recommended depends on the height of the structure
• The number and arrangement of light units at each level should be placed so the lighting is visible from every angle in azimuth
• Lights are applied to display the general definition of the structure
• Width and length of buildings determine the number of lights installed at the top and at each light level

Obstruction Light Installation

• h ≤ 45m           Only one level: Low intensity

• 45m < h ≤ 105m    2 levels

 *Top level: Medium intensity; 

 *Intermediate level: Low intensity/Medium Intensity;

• 105m < h ≤ 210m   4 levels

*Top level: Medium intensity;

*First Intermediate level: Low intensity/Medium Intensity;

*Second Intermediate level: Mediumintensity;

*Lower Intermediate level: Lowintensity/Medium Intensity;

                                                                                                       Obstruction Ligth Specification

Low intensity lights should be used for structure with H ≤ 45m during night time, if those are considered inadequate, than medium - high intensity lights should be used.

Medium intensity lights type A,B or C should be used to lit extensive object (group of buildings or tree) or structure with 45 m < H ≤ 150 m

Note: Medium intensity lights, type A and C should be used alone, whereas medium intensity lights, Type B should be used either alone or in combination with LIOL-B.

High intensity type A, should be used to indicate the presence of an object if its H > 150 m and an aeronautical study indicates such lights to be essential for the recognition of the object by day