Chapter 5
Table 5.2. Rotary-Wing Taxiways.
Item
Item Description
Requirement
Remarks
No.
1
Width
Army and Air Force facilities.
15 m [50 ft]
Navy and Marine Corps facilities.
12 m [40 ft]
See Remarks Basic width applicable to taxiways that support
helicopter operations only. When dual use
taxiways support fixed-wing aircraft operations,
use the appropriate fixed-wing criteria.
2
Max 2.0%
Longitudinal Grade
3
Transverse Grade
Min 1.0%
Max 1.5%
4
Paved Shoulders
See Table 4.4.
Min 30.48 m
5
Basic helicopters clearance. Increase as
Clearance from Centerline to
[100 ft]
appropriate for dual use taxiways. See Table
Fixed and Mobile Obstacles
3.2, Item No. 12 for definitions of fixed and
(taxiway clearance line)
mobile obstacles.
Max 5.0%
Clear area is the area between the taxiway
6
Grades Within the Clear
shoulder and the taxiway clearance line.
Area
NOTES:
1. Metric units apply to new airfield construction and where practical modification to existing airfields and heliports,
as discussed in paragraph 1.4.4.
2. The criteria in this manual are based on aircraft specific requirements and are not direct conversions from inch-
pound (English) dimensions. Inch-pound units are included only as a reference to the previous standard.
3. Airfield and heliport imaginary surfaces and safe wingtip clearance dimensions are shown as a direct conversion
from inch-pound to SI units.
Table 5.3. Rotary-Wing Taxiway Shoulders.
Item
Item Description
Requirement
Remarks
No.
7.5 m
May be increased when necessary to
1
Total Width of Shoulder
[25 ft]
accommodate dual operations with fixed-
(Paved and Unpaved)
wing aircraft.
7.5 m
May be increased when necessary to
2
Paved Shoulder Width
[25 ft]
accommodate dual operations with fixed-
Adjacent to All
wing aircraft.
Operational Pavements
3
Variable
Conform to the longitudinal grade of the
Longitudinal Grade
abutting primary pavement.
4
2.0% min
Slope downward from edge of pavement.
Transverse Grade
4.0% max
5-9
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