Table A3.1. Facility Class 1: Operational and Training Facilities, Category Group 11:
Airfields Pavement, General
Item and Allowance
Fixed-Wing Taxiway, Surfaced
Paved surfaces which serve as designated pathways on an airfield or heliport and are
constructed for taxiing rotary-wing aircraft. From an operational point of view, a
taxiway includes the prepared surface, markings, stabilized shoulders, lighting and
lateral clearance zones. For inventory purposes, only the prepared surface is included
At helicopter only facilities, a basic width of 15 m [50 ft] is authorized. When dual-
use taxiways support Fixed-Wing operations, use appropriate Fixed-Wing taxiway
Rotary-Wing Taxiway, Unsurfaced
Unpaved prepared surfaces which serve as designated pathways on an airfield or
heliport and are constructed for taxiing rotary-wing aircraft. From an operational
point of view, a taxiway includes the prepared surface, stabilized shoulders, and
lateral clearance zones. For inventory purposes, only the prepared surface is
113 Airfield Pavements - Aprons
Prepared surfaces, other than runways and taxiways, where aircraft are parked or moved about the
airfield area. They are designed to support specific types of aircraft and to meet operational
requirements such as maintenance and loading/unloading activities.
The permanent peace time operation and maintenance of Army aircraft requires construction of
apron areas to assure safe, efficient and economical accomplishment of the mission.
For Fixed-Wing; rigid pavement areas with standard aircraft tiedowns spaced 6 m [20 ft] on centers
throughout the usable parking apron area are authorized for parking, maintenance, and hangar access
apron areas. Parking aprons should be designed to permit 85% of the authorized aircraft to park
under their own power [75% operational parking and 10% maintenance operational checks (MOC)).
The remaining 15% are parked in maintenance facility buildings. When an area is inadequate to
permit this capability, operational parking capacity may be reduced to not less than 50% of the 85%
with the balance of the 85% being provided surfaced manual parking area. Standard aircraft
tiedowns conforming to criteria in Appendix K of this Manual should be used. These tiedowns also
serve as the static grounding points.
For Rotary-Wing; see Chapter 6 for additional information. The number of Army rotary-wing aircraft
used to estimate apron area is 85% of the authorized aircraft. This assumes that 75% of the aircraft will
be operational and 10% will be parked for MOCs. The remaining 15% of the authorized aircraft can be
assumed to be in maintenance facilities. Any substantial difference to exceed this allowance should be
authenticated and submitted as a request to the MACOM to exceed this allowance.
Fixed-Wing Parking Apron, Surfaced
A paved airfield surface used for fixed-wing aircraft parking. The area includes parking
lanes, taxilanes, exits, and entrances. Aircraft move under their own power to the parking
spaces, where they may be parked and secured with tiedowns. Parking designed to
distribute aircraft, for the purpose of increased survivability (dispersed hardstands), is