Draft ICAO Circular on NLA.pdf - Airports Council International

-7-
b) dimensions of aprons and holding bays; and
c) dimensions of turn pads.
2.2.8.2 The increased wheelbase dimensions of newer generation longer aeroplanes (A340-600, B-
777-300) require a specific study to ascertain the adequacy of existing fillets and when designing other new
facilities.
2.2.9 Landing gear design
2.2.9.1 The aeroplane landing gear design is such that the overall mass of the aeroplane is distributed
so that the stresses transferred to the soil through a well-designed pavement are within the soil’s bearing
capacity. The landing gear layout also has an effect on the manoeuvrability of the aeroplane. The various
factors that would impact an aerodrome pavement system are discussed hereafter.
2.2.10 Outer main gear wheel span
2.2.10.1 Outer main gear wheel span may influence:
a) runway width;
b) dimensions of turn pads;
c) taxiway width;
d) taxiway fillets; and
e) dimensions of aprons and holding bays.
2.2.11 Wheelbase
2.2.11.1 The wheelbase may influence dimensions of turn pads, taxiway fillets, and dimensions of
aprons and holding bays.
2.2.12 Main gear steering system
2.2.12.1 The main gear steering may influence dimensions of turn pads, dimensions of aprons and
holding bays.
2.2.13.1 The maximum mass may influence:
2.2.13 Maximum aircraft mass
a) design of pavements and underground structures;
b) mass limitation on existing bridges, tunnels and culverts under runways and taxiways;
c) disabled aircraft removal; and
<strong>ICAO</strong> Version 4.1 — 15 March 2004