CS HPT-DSN.C.200 Helicopter ground taxiways and helicopter ground taxi-routes
ED Decision 2019/012/R
(a) General: A helicopter ground taxiway should be designed to permit the surface movement of a wheeled helicopter under its own power.
(b) Characteristics:
(1) The width of a helicopter ground taxiway should not be less than 1.5 times the largest width of the undercarriage (UCW) of the helicopters the helicopter ground taxiway is intended to serve (see Figure C-1).
(2) The longitudinal slope of a helicopter ground taxiway should not exceed 3 per cent.
(3) A helicopter ground taxiway should be static load-bearing and capable of withstanding the traffic of the helicopters the helicopter ground taxiway is intended to serve.
(4) A helicopter ground taxiway should be centred on a helicopter ground taxi-route.
(5) A helicopter ground taxi-route should extend symmetrically on each side of the centre line for at least 0.75 times the largest overall width of the helicopters it is intended to serve.
(6) No fixed object should be permitted above the surface on a helicopter ground taxi-route, except for frangible objects, which, because of their function, must be located there.
(7) No mobile object should be permitted on a ground taxi-route during helicopter movements.
(8) Objects whose function requires them to be located on a helicopter ground taxi-route should not:
(i) be located at a distance of less than 50 cm from the edge of the helicopter ground taxiway; and
(ii) penetrate a plane originating at a height of 25 cm above the plane of the helicopter ground taxiway, at a distance of 50 cm from the edge of the helicopter ground taxiway and sloping upwards and outwards at a gradient of 5 per cent.
(9) The helicopter ground taxiway and the helicopter ground taxi-route should provide rapid drainage but the transverse slope of a helicopter ground taxiway should not exceed 2 per cent.
(10) The surface of a helicopter ground taxi-route should be resistant to the effect of rotor downwash.
(11) For simultaneous operations, the helicopter ground taxi-routes should not overlap.
Figure C-1. Helicopter ground taxi-route/taxiway