Page 246 - Planning and Design of Airports

210 Airp o r t D e sign

Profile of runway centerline

0 to 2%

Grade
0 to 2% Vertical change
curve 0 to 2% Vertical
length curve length 0 to 2%
Grade
change

Distance between
change in grade
(a)

200' Profile of runway centerline 200'
1 1
End runway End runway
4 4

Vertical Grade
Grade curve change
change length
0 to –3% 0 to 0.8% 0 to 1.5% 0 to 0.8% 0 to –3%
1.5% max
0 to 1.5%
Vertical Vertical
Grade
curve change length
curve
length
End of runway Distance Distance End of runway

between
change
change in between
grade in grade
(b)
FIGURE 6-22 Runway longitudinal profi le: (a) utility airports, (b) transport airports.

longitudinal gradient and longitudinal grade changes to 2 percent for
runways serving approach category A and B aircraft and 1.5 percent
for runways serving approach category C, D, and E aircraft. ICAO
limits both longitudinal gradient and longitudinal grade changes to
2 percent for aerodrome code number 1 and 2 runways and 1.5 percent
for aerodrome code number 3 runways. For aerodrome code number
4 runways the maximum longitudinal gradient is 1.25 percent and the