Appendix 14 Volume Three (b) Main Strip The main strip is currently 1545 metres long and 152.5 metres wide and contains the main runway symmetrically within it. Main Take-off Climb/Approach Slopes Each of the two take-off climb/approach slopes off the main strip rises at a gradient of 1.6% (1 in 62.5) over a horizontal distance of 15000 metres. In addition there is a curved take-off climb surface with its origin at the western end of the main strip. The base line is 152.5 metres wide and extends straight ahead for a distance of 914 metres then curves right on a centre line radius of 1295.4 metres until it intercepts the 45 metres horizontal surface. The slope of this surface has a gradient of 1.6% (1 in 62.50). From point of commence of turn there is a 4.6 metre vertical step down across the full width of the fan and the gradient then continues on from this lower level at 1.6%. (c) Main Strip Take-off climb/Approach Fan expansion Each take-off climb/approach slope extends over a horizontal distance specified below and is symmetrically disposed about the extended centre line of the strip with its sides diverging uniformly outward at a rate of 15% (832’) from the corners of each 0 strip end. In the case of the turning flight path surface a 4.6 metre step down occurs at the commencement of the turn and the whole width of the surface then continues. (d) Parallel Grass Runway 06/24 Running parallel to the main sealed runway 06/24 is a grass strip of 1425 metres by 60 metres. Transitional side slopes and take-off climb/approach fans originate from this strip in the same manner as for the main runway. Subsidiary Strip 10/28 The subsidiary strip is 1182 metres long and 90 metres wide and is orientated on a bearing of 12188 True. o Parallel Grass runway and Subsidiary Strip Take-off Climb/Approach Slopes Each of the two take-off climb approach slopes off the subsidiary strip rises at a gradient of 2.5% (1 in 40) over a horizontal distance of 15000 metres for the parallel grass runway and 2500 metres for the subsidiary strip. Transitional Slopes These extend upwards and outwards from both the sides of each approach slope and the length of the strip edge rising at a gradient of 14.3% (1in 7) to intercept the horizontal surface. Horizontal Surface The horizontal surface is a horizontal plane, with a height of 45 metres above the established airport datum and extending 4000 metres from all four sides of the strip edge. Where ground rises so that it penetrates or becomes close to the horizontal surface this surface may be adjusted in conformity with the ground so as to provide a vertical clearance of 10 metres above ground level. Conical Surface The conical surface extends from the periphery of the horizontal surface upwards and outwards at a slope of 5% until a height of 150 metres above the airfield datum is reached. Where ground rises so that it penetrates or becomes close to the conical surface then this surface may be adjusted in conformity with the ground so as to provide vertical clearance of 10 metres. Note: All height restrictions are based on Civil Aviation (AC 139.6) obstacle limitation surfaces. All elevations are provided in metres above average mean sea level unless otherwise stated. App 14 – 2