Document ID: chunk:federal_register_of_legislation:F2024C01244:reg:4:p9
Version: federal_register_of_legislation:F2024C01244
Segment Type: reg
Provision Reference: reg 4 (pt 9/15)
Character Range: 217102–219805

the clearance between the outer main gear wheels and the edge of the taxiway, at any point, must not be less than the distance determined using Table 6.38 (1).

       (2) In Table 6.38 (1), for a taxiway with an OMGWS mentioned in a row of column 1, the minimum clearance between the outer main gear wheels of an aircraft and the edge of the taxiway is the clearance mentioned in the same row in column 2.

     Table 6.38 (1)   Minimum clearance between outer main gear wheels of aircraft and edge of taxiway

OMGWS                                                                                   Minimum clearance
Up to but not including 4.5 m                                                           1.5 m
4.5 m up to but not including 6 m                                                       2.25 m
6 m up to but not including 9 m                                                         3 m on straight portions
3 m on curved portions — for aeroplanes with a wheelbase less than 18 m
4 m on curved portions — for aeroplanes with a wheelbase equal to or greater than 18 m
9 m up to but not including 15 m                                                        4 m

Note   Wheelbase means the distance from the nose gear to the geometric centre of the main gear.

6.39 Taxiway curves

       (1) The radii of any curves of a taxiway must be compatible with the manoeuvring capability and normal taxiing speeds of the aeroplanes for which the taxiway is provided.

Note   See ICAO Document 9157, Aerodrome Design Manual, Part 2 — Taxiways and Aprons, for further guidance on the design of the curves. For ICAO documents, see section 1.07.

       (2) The design of a taxiway curve must be such that, when the cockpit of the aeroplane remains over the taxiway centreline markings, the clearance distance between the outer main gear wheels of the aeroplane and the edge of the taxiway is not less than that specified in Table 6.38 (1).

6.40 Taxiway longitudinal slope

       (1) The design longitudinal slope along any part of a taxiway must not exceed:

(a) for a code C, D, E or F taxiway — 1.5%; and

(b) for a code A or B taxiway — 3.0%.

       (2) If it is physically impossible to avoid slope changes along any part of a taxiway, the transition from one longitudinal slope to another must be accomplished by a vertical curve, with a rate of change not more than:

(a) for a code C, D, E or F taxiway — 1.0% per 30 m (minimum radius of curvature of 3 000 m); and

(b) for a code A or B taxiway — 1.0% per 25 m (minimum radius of curvature of 2 500 m).

       (3) The longitudinal slope values expressed in subsections (1) and (2) do not apply at the intersection of a taxiway with a runway