CS ADR-DSN.L.535 Threshold marking

(a)Applicability: A threshold marking should be provided at the threshold of a runway.

(b)Characteristics:

(1)The stripes of the threshold marking should commence 6 m from the threshold.

(2)A runway threshold marking should consist of a pattern of longitudinal stripes of uniform dimensions disposed symmetrically about the centre line of a runway as shown in Figure L-1(A) and L-1(B) for a runway width of 45 m. The number of stripes should be in accordance with the runway width as follows:

except that on non-precision approach and non-instrument runways 45 m or greater in width, they may be as shown in Figure L-1(C).

(3)The stripes should extend laterally to within 3 m of the edge of a runway or to a distance of 27 m on either side of a runway centre line, whichever results in the smaller lateral distance.

(4)Where a runway designation marking is placed within a threshold marking, there should be a minimum of three stripes on each side of the centre line of the runway.

(5)Where a runway designation marking is placed above a threshold marking, the stripes should be continued across the runway. The stripes should be at least 30 m long and approximately 1.80 m wide with spacings of approximately 1.80 m between them. Where the stripes are continued across a runway, a double spacing should be used to separate the two stripes nearest the centre line of the runway, and in the case where the designation marking is included within the threshold marking, this spacing should be 22.5 m.

(c)Displaced threshold:

(1)Where a threshold is displaced from the extremity of a runway or where the extremity of a runway is not square with the runway centre line, a transverse stripe as shown in Figure L-3(B) should be added to the threshold marking.

(2)A transverse stripe should be not less than 1.80 m wide.

(3)Where a runway threshold is permanently displaced, arrows conforming to Figure L-3(B) should be provided on the portion of the runway before the displaced threshold.

(4)When a runway threshold is temporarily displaced from the normal position, it should be marked as shown in Figure L-3(A) or L-3(B), and all markings prior to the displaced threshold should be obscured except the runway centre line marking which should be converted to arrows.

[Figure or form omitted from this preview — available in the Avioverse workspace library.] Figure L-3. Displaced threshold markings

[Issue: ADR-DSN/3]