Document ID: chunk:federal_register_of_legislation:F2024C01244:reg:4:p14
Version: federal_register_of_legislation:F2024C01244
Segment Type: reg
Provision Reference: reg 4 (pt 14/21)
Character Range: 177772–180240

2 runway — 2%.

       (3) For a code 4 runway, the longitudinal slope along the first and the last quarters of the runway must not exceed 0.8%.

       (4) For a precision approach CAT II or CAT III code 3 runway — the longitudinal slope along the first and last quarters of the runway must not exceed 0.8%.

       (5) If slope changes cannot be avoided, the change in longitudinal slope between any 2 adjoining 45 m segments of the runway must not exceed the following:

(a) for a code 3 or 4 runway — 1.5%;

(b) for a code 1 or 2 runway — 2%.

       (6) The transition from 1 longitudinal slope to another must be accomplished by a vertical curve with a rate of change not exceeding:

(a) for a code 4 runway — 0.1% for every 30 m (with a minimum radius of curvature of 30 000 m); or

(b) for a code 3 runway — 0.2% for every 30 m (with a minimum radius of curvature of 15 000 m); or

(c) for a code 1 or 2 runway — 0.4% for every 30 m (with a minimum radius of curvature of 7 500 m).

       (7) The maximum runway longitudinal slope values expressed in subsections (1) to (6) do not apply at the intersection of a runway with another runway or a taxiway if:

(a) there are conflicting drainage requirements or slope requirements; and

(b) alternative runway longitudinal slope values are as follows:

 (i) arrived at after a safety analysis using the safety management system and the risk management plan;

 (ii) as close as practicable to values expressed in subsections (1) to (6);

 (iii) demonstrably safe for aircraft operations;

 (iv) recorded in the aerodrome manual.

       (8) The distance between the points of intersection of 2 successive longitudinal slope changes must be at least the greater of:

(a) 45 m; or

(b) the distance (D) in metres worked out using the formula:

       D = k [|S1 - S2| + |S2 - S3|]/100.

       (9) For subsection (8):

(a) k means:

 (i) for a code 4 runway — 30 000 m; or

 (ii) for a code 3 runway — 15 000 m; or

 (iii) for a code 1 or 2 runway — 5 000 m; and

(b) "S1", "S2" and "S3" are the 3 successive slopes expressed as percentage values and represented as absolute numerical values.

Note   Figure 6.06 (9) shows an example of that part of the calculation for the distance between the points of intersection of 2 successive longitudinal slope changes, that is required by subsection 6.06 (8), where the runway is the transverse line running from higher left to lower right.

If the runway code number is 3,