Quantcast Table 12. Aircraft Aprons (Fixed- and Rotary-Wing Aircraft)

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MIL-HDBK-1021/1
TABLE 12
Aircraft Aprons (Fixed- and Rotary-Wing Aircraft)
____________________________________________________________________________
Item
Criteria
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Size and configuration:
Variable, consult NAVFAC P-80.
As a general rule there are no standard
sizes for aprons.  They are individually
designed to support specific aircraft
uses.  The detailed dimensions are
determined by the number and type of
aircraft involved, the function of the
apron, and the maneuvering
characteristics of the aircraft and the
degree of unit integrity to be
maintained.  Other determinants are the
physical characteristics of the site,
relationship of the apron area to other
airfield facilities and the objective of
the master plan.
Grades:
0.5% minimum.
(For rigid pavement only
1.5% maximum.
and for small areas.)
Engineering analysis occasionally may
indicate a need to vary these limits.
Avoid surface drainage with numerous
or abrupt grade changes which can
cause flexing of aircraft or rotor
blades or other structural damage.
Width of shoulders:
25 feet for rotary wing.
50 feet for fixed wing.
Longitudinal grade of shoulders:
Variable.
Conform to longitudinal
grade of the abutting
primary pavement.
Transverse grade of shoulders:
Class A Runway
5.0% first 10 feet followed by 2.0%
minimum to 4.0% maximum.
Class B Runway
2.0% minimum.
Unpaved shoulders may
4.0% maximum.
be increased to 5.0%
for the first 10 feet.
Paved shoulders for B52 aircraft will
have transverse grades between 1.5%
and 2.0%.
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