10 January 2005
including change 3, 13 April 2007
Hangar Doors. Hangar doors should be a specialized, insulated,
hangar type with swinging leaves. These doors should serve as an insulated
supply air plenum when closed. Provide perforated plates in the supply air
plenum, one stationary and one adjustable, which allow for balancing to achieve
laminar flow. Use 19 mm (3/4-inch) to 25 mm (1-inch) holes spaced to give
approximately 50 percent free area. Plates are to be 18 gauge galvanized steel
\ is recommended but other arrangement may be used if the required
calculations are performed or if alternative successful designs can be proven.
Refer to UFC 3-410-04N, Industrial Ventilation Systems for other criteria. A
Computational Fluid Dynamics study is also recommended to help determine
proper airflow from whichever configuration is used. /2/ Each door leaf should be
a motor-operated unit with a release mechanism, and provide the doors with a
means of movement in the event of a power failure. Install adequate safety
devices to prevent injury to personnel and damage to equipment due to moving
door sections. Design thresholds to minimize dirt accumulation and ice buildup.
See UFC 4-211-01N. \ For larger sized aircraft, other types of doors may be
Personnel Doors. Install 1-1/2-hour B-rated, self-closing fire doors
for personnel doors between the hangar area and paint and chemical mixing
rooms and the corridor. Hold-open devices are not permitted.
Other Doors. Other doors should be as described in UFC 4-211-
01N. Provide self-closing, insulated personnel exit doors from each hangar bay.
No hold-open devices are permitted. Take special precautions to seal doors
between hangar areas and exterior or adjacent spaces. Provide a vehicle
access door either within or adjacent to the hangar aircraft access doors.
Insulate building walls, roofs, and floors in accordance with UFC 4-211-01N.
Provide the sidewalls, the inside of hangar doors, and the ceiling of the hangar
area with a light color, smooth surface such as white enameled metal panels.
Exterior paved areas include aircraft and vehicle access and non-organizational
parking. Aircraft pavement should be in accordance with UFC 3-260-02. Vehicle
access and parking should be in accordance with facility plates in this UFC and
MIL-HDBK-1190, Facility Planning and Design Guide.