TM 5-823-4
CHAPTER 4
MARKING OF OVERRUN AND SHOULDER AREAS AT HELIPORTS
taxiway, beginning at the edge of the taxiway and
4-1.
General. Double-bituminous-surface-treatment
extending outward to a point 5 feet inside the outer edge
overrun and shoulder areas that are not intended for
of the shoulder area. Straight sections of taxilane,
aircraft traffic will be marked with yellow lines 18 inches
apron, hardstand, and engine-runup shoulder areas will
wide in accordance with the requirements below.
be marked by lines beginning at points not exceeding 50
Configurations complying with these requirements are
feet from all points of tangency of curves and will be
detailed in figures 4-1 and 4-2.
perpendicular to the paved area edges as shown in
figures 4-1 and 4-2. Lines will terminate 5 feet inside the
4-2.
Overrun areas. Overrun areas will be marked
outer edge of the shoulder areas.
with a chevron layout as shown in figure 4-1. The index
b. Curved sections. Curved sections of all
point for the layout of the chevron marking will be the
shoulder areas will be marked by one line beginning at
point of intersection of the runway centerline and the
the edge of the paved areas and extending outward to a
runway threshold line. The apex of the initial chevron on
point 5 feet inside the outer edge of the shoulder area.
the approach side of the threshold will be at a point 25
The marking will be placed radially beginning at the
feet outward from the index point. Subsequent chevrons
center of the curve as shown in figures 4-1 and 4-2.
will be placed on 50-foot centers as shown in figure 4-1.
Partial chevrons will be placed as indicated in figure 4-1.
4-5.
Detail requirements.
The apex of each chevron will be on the centerline with
a. Color marking. All heliport overrun and
each leg making an angle of 45 degrees with the runway
shoulder areas will be marked with nonreflective yellow
centerline. The chevrons will terminate at a point 5 feet
paint.
inside the outer edge of the shoulder area.
b. Marking materials. Nonreflective paint used
in marking or re-marking overrun and shoulder areas will
4-3.
Runway-shoulder areas. All runway-shoulder
consist of the pigmented binder (paint) stated in
areas will be marked as shown in figure 4-1. These
paragraph 2-2a(2) above.
partial chevrons are a continuation of the chevrons used
c. Application of paint. Painted markings will
in marking overrun areas as indicated in paragraph 4-2
be applied to overrun and shoulder areas only after the
above and as shown in figure 4-1. The chevrons used in
double bituminous surface treatment has been allowed
marking the runway-shoulder areas will have the same
to cure as long as practicable. Care will be taken to
index point as the chevrons marking the overrun areas.
insure that the surface to be painted is clean and dry
Chevrons will be laid out uniformly from both ends of the
prior to painting. To prevent undue softening of the
runway as shown in figure 4-1. The partial chevrons will
bitumen by the paint, the maximum drying-time
terminate at a point 5 feet inside the outer edge of the
requirements of the paint specifications will be strictly
shoulder area.
enforced.
4-4.
Taxiway, taxilane, apron, hardstand, and
engine-runup shoulder areas.
a. Straight sections.
Straight sections of
taxiways will be marked by yellow lines 18 inches wide
beginning at the runway-shoulder edge and spaced at
intervals not exceeding 50 feet as shown in figure 4-1.
The lines will be perpendicular to the centerline of the
4-1
Previous Page
