Aerodrome Safety Circular

ASC 2003-019
2003.01.10




TABLE 2

AERODROME PHYSICAL CHARACTERISTICS
Minimum Requirements
  TYPE OF RUNWAY
Non-Instrument Runway Non-Precision Runway
AIRCRAFT SIZE
(Based on wing span)
Up to but not including 15 m
(49 ft)
15 m
(49 ft)
up to but not including 24 m
(79 ft)
24 m
(79 ft)
up to but not including 36 m
(118 ft)
36 m
(118 ft) up to but not including 52 m
(171 ft)*
Up to but not including 15 m
(49 ft)
15 m
(49 ft)
up to but not including 24 m
(79 ft)
24 m
(79 ft)
up to but not including 36 m
(118 ft)
36 m (118 ft)
up to but not including 52 m
(171 ft)*
CHARACTERISTICS
Strip Specifications:  
Strip width (each side of centre line) 30 m
(98.5 ft)
30 m
(98.5 ft)
45 m
(148 ft)
75 m
(246 ft)
45 m
(148 ft)
45 m
(148 ft)
75 m
(246 ft)
150 m
(492 ft)
Strip length
(Prior to threshold and beyond departure end)
30 m
(98.5 ft)
60 m
(197 ft)
60 m
(197 ft)
60 m
(197 ft)
60 m
(197 ft)
60 m
(197 ft)
60 m
(197 ft)
60 m
(197 ft)
Approach / Take-off Slopes and Dimensions:  
Length of the inner edge 60 m
(197ft)
60 m
(197 ft)
90 m
(295ft)
150 m
(492ft)
90 m
(295ft)
90 m
(295ft)
150 m
(492ft)
300 m
(984ft)
Distance from threshold 30 m
(98.5ft)
60 m
(197 ft)
60 m
(197 ft)
60 m
(197 ft)
60 m
(197 ft)
60 m
(197 ft)
60 m
(197 ft)
60 m
(197 ft)
Divergence (minimum each side) 10% 10% 10% 10% 10% 10% 15% 15%
Length (minimum) 2500 m
8202 ft
2500 m
8202 ft
2500 m
8202 ft
2500 m
8202 ft
2500 m
8202 ft
2500 m
8202 ft
3000 m
9843 ft
3000 m
9843 ft
Slope (maximum) 5%
(1:20)
4%
(1:25)
2.50%
(1:40)
2.50%
(1:40)
3.33%
(1:30)
3.33%
(1:30)
2.50%
(1:40)
2.50%
(1:40)
Transition Surfaces (Slope) 20.00%
(1:5)
20.00%
(1:5)
14.30%
(1:7)
14.30%
(1:7)
14.30%
(1:7)
14.30%
(1:7)
14.30%
(1:7)
14.30%
(1:7)
NOTE * : aircraft of 52 m (171 ft) and wider will be evaluated individually.

DEFINITIONS

Obstacle Limitation Surface (OLS). A surface that establishes the limit to which objects may project into airspace associated with an aerodrome so that aircraft operations at the aerodrome may be conducted safely. Obstacle limitation surfaces consist of the following:

  1. Take-off/Approach Surface. An incline plane beyond the end of the runway and preceding the threshold of a runway. The origin of the plane comprises:

    1. An inner edge of specified length (strip width), perpendicular to and evenly divided on each side of the extended centre line of the runway, and beginning at the end of the runway strip;
    2. Two sides originating at the ends of the inner edge, diverging uniformly at a specified rate in the direction of take-off;
    3. The elevation of the inner edge is equal to the elevation of the threshold.
  2. Transitional Surface. A complex surface sloping up at a specified rate from the side of the runway strip and from part of the take-off/approach surface. The elevation of any point on the lower edge of the surface is:

    1. Along the side of the take-off/approach surface, equal to the elevation of the take-off/approach surface at that point; and,
    2. Along the runway strip, equal to the elevation of the centreline of the runway, perpendicular to that point.

Strip. An area of specified dimensions enclosing a runway, intended to reduce the risk of damage to aircraft running off a runway, and to protect aircraft flying over it during take-off and landing operations.

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