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 MIL-HDBK-1021/1
TABLE 7
Helicopter Runway (VFR and IFR)
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Item
Criteria
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Location
Where desirable to separate fixed-wing aircraft
traffic from rotary-wing aircraft traffic.
Pavement
Basic length: 450 feet.*
Width: 75 feet; on airfields accommodating H-53
aircraft, 100 feet minimum.
Maximum irregularity: + 1/8 inch in 10 feet for
rigid pavement.
+ 1/4 inch in 10 feet for
flexible pavement.
Longitudinal grade: 1.0% maximum.
Transverse grade: 1.0% minimum
1.5% maximum.
Aprons
See Table 12.
Overrun
Length: 75 feet.
Width: Width of runway plus shoulders.
Longitudinal centerline grade:
Same as last
100 feet of runway.
Transverse grade:
2.0% minimum.
Warp to meet runway
3.0% maximum.
and shoulder grades
Takeoff safety
Length: 400 feet (except triangular-helicopter
zone (VFR
practice pad where L = 800 feet).
helicopter run-
Width: 300 feet (inner edge). Corresponds to the
way only)
width of the primary surface.
Width: 400 feet (outer edge) (except
triangular-helicopter practice pad where W = 700
feet)
Grades in any direction: 5.0% maximum, area to be
free of obstructions. Rough
grade and turf when
required. No takeoff
safety zone is required at
IFR helicopter runway due
to extensive primary
surface area beyond the
ends of the runway.
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* Basic length to be corrected for elevation and temperature. Increase 10.0
percent for each 1000 feet in elevation above 2000 feet M.S.L. and add 4.0
percent for each 10o F above 59o F for the average daily maximum temperature of
the hottest month. For a special mission or proficiency training such as
autorotation operations, the length may be increased up to 1000 feet in which
case make no additive corrections.
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