Page 369 - Planning and Design of Airports

Airport Lighting, Marking, and Signage 321

Runway Length Markings on Each End
7990 ft (2436 m) or greater Full set of markings
6990 ft (2130 m) to 7989 ft (2435 m) Less one pair of markings
5990 ft (1826 m) to 6989 ft (2129 m) Less two pairs of markings
4990 ft (1521 m) to 5989 ft (1825 m) Less three pairs of markings

TABLE 8-4 Touchdown Zone Marking Requirements

72 ft apart symmetrically about the runway centerline, and beginning
1020 ft from the threshold.

Touchdown Zone Markings
Runway touchdown zone markings are white and consist of groups
of one, two, and three rectangular bars symmetrically arranged in
pairs about the runway centerline. These markings begin 500 ft from
the runway threshold. The bars are 75 ft long, 6 ft wide, with 5 ft
spaces between the bars, and are longitudinally spaced at distances
of 500 ft along the runway. The inner stripes are placed 36 ft on either
side of the runway centerline. For runways less than 150 ft in width,
the width and spacing of stripes may be proportionally reduced.
Where touchdown zone markings are installed on both runway ends
on shorter runways, those pairs of markings which would extend to
within 900 ft of the runway midpoint are eliminated. In addition, sets
of touchdown zone markings are eliminated for shorter runways, as
specified in Table 8-4.

Side Stripes
Runway side stripes consist of continuous white lines along each side
of the runway to provide contrast with the surrounding terrain or to
delineate the edges of the full strength pavement. The maximum dis-
tance between the outer edges of these markings is 200 ft and these
markings have a minimum width of 3 ft for precision instrument run-
ways and are at least as wide as the width of the centerline stripes on
other runways.

Displaced Threshold Markings
At some airports it is desirable or necessary to “displace” the runway
threshold on a permanent basis. A displaced threshold is one which
has been moved a certain distance from the end of the runway. Most
often this is necessary to clear obstructions in the flight path on land-
ing. The displacement reduces the length of the runway available for
landings, but takeoffs can use the entire length of the runway. The FAA