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MILHDBK1021/1
TABLE 2
Runway Pavement Criteria
_____________________________________________________________________________
Item
Criteria
_____________________________________________________________________________
Strength and type
MILHDBK1021/2/4 and NAVFAC DM21.3.
of pavement
Smoothness
Maximum irregularity shall be:
Rigid Pavement + 1/8 inch in 10 feet.
Flexible Pavement + 1/4 inch in 10 feet.
Length
For computation of runway lengths, see
NAVFAC P80.
Width:
Class A Runway
75 feet minimum  200 feet maximum, see
NAVFAC P80.
Class B Runway
200 feet.
Maximum longitudinal grades:
Class A and B Runways
1%.
Hold to minimum practical.
0.8% in first and last 3000 feet.
Longitudinal grade changes:
Class A and B Runways
Maximum allowable grade change at a vertical
point of intersection (PI) is 1.5%.
Maximum allowable rate of grade change is
0.10% per 100 lineal feet of runway
for new construction.
Exception:
0.167% for thin overlays on
existing construction prior to
1989.
Exception:
0.3% at basic training
outlying fields.
Exception:
0.4% for edge of runways at
runway intersections.
Maximum rate of longitudinal grade change
is produced by vertical curves having 1000
foot lengths for each percent of
algebraic difference between the two
grades. Where more than one grade change
occurs, the distance between two
successive points of intersection (PIs)
will be no less than 1000 feet and two
successive distances between PIs will not
be the same.
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