Page 211 - Planning and Design of Airports

176 Airp o r t D e sign

Distance
Reference between Outside
Code Field Length, Code Edges of Main
Number m Letter Wingspan, m Wheel Gear, m
1 <800 A <15 <4.5
2 800–<1200 B 15–<24 4.5–<6
3 1200–<1800 C 24–<36 6–<9
4 ≥1800 D 36–<52 9–<14
E 52–<65 9–<14
F 65–<80 14–<16

TABLE 6-3 ICAO Aerodrome Reference Codes

These aerodrome reference codes are given in Table 6-3. For exam-
ple, an airport which is designed to accommodate a Boeing 767–200
with an outer main gear wheel span of width of 34 ft 3 in (10.44 m),
a wingspan of 156 ft 1 in (48 m), at a maximum takeoff weight of
317,000 lb, requiring a runway length of about 6000 ft (1830 m) at sea
level on a standard day, would be classified by ICAO with an aero-
drome reference code of 4-D. It will be noted that this classification
system does not explicitly include the function of the airport, the ser-
vice it renders, or the type of aircraft accommodated.
There is an approximate correspondence between the airport ref-
erence code of the FAA and the aerodrome reference code of the ICAO
[2, 3]. The FAA’s aircraft approach category of A, B, C, and D are
approximately the same as the ICAO aerodrome code numbers 1, 2,
3, and 4, respectively. Similarly the FAA’s airplane design groups of I,
II, III, IV, and V approximately correspond to ICAO aerodrome code
letters A, B, C, D, and E.

Utility Airports
Autility airport is defined as one which has been designed, constructed,
and maintained to accommodate approach category A and B aircraft [6].
The specifications for utility airports are grouped for small aircraft,
those of maximum certified takeoff weights of 12,500 lb or less, and
large aircraft, those with maximum certified takeoff weight in excess
of 12,500 lb.
Design specifications for utility airports are governed by the air-
plane design group and the types of approaches authorized for the
airport runway, that is, visual, nonprecision instrument or precision
instrument approaches.
Utility airports for small aircraft are called basic utility stage I, basic
utility stage II, and general utility stage I. Utility airports for large aircraft