Conical surface definition

Conical surface means a surface extending outward and upward from the periphery of the horizontal surface at a slope of 20 to 1 for a horizontal distance of 4,000 feet.
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Conical surface means a surface extending outward and upward from the periphery of the horizontal surface at a slope of twenty to one for a horizontal distance of four thousand feet.
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Conical surface means an imaginary plane extending outward and upward from the perimeter of a runway's horizontal surface at 1 of the following slopes, as applicable:
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More Definitions of Conical surface

Conical surface for a nonfederal aid airport means a surface extending outward and upward from the periphery of the horizontal surface at a slope of 15:1 for a horizontal distance of 4,000 feet. See also 14 CFR 77.25, 77.28 and 77.29 for standards as they apply to federal aid airports.
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Conical surface means a zone that circles around the periphery of and outward from the horizontal surface, with the floor set by the conical zone. The Conical Surface extends upward and outward from the outer limits of the Horizontal Surface for a horizontal distance of 4,000 feet. The slope of the conical surface is 20:1 (5 percent) measured in a vertical plane.
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Conical surface means a surface extend- ing outward and upward from the periphery of the horizontal surface at a slope of 20:1 for a horizontal distance of 4,000 feet.
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Related to Conical surface

  • Water surface elevation means the height, in relation to the National Geodetic Vertical Datum (NGVD) of 1929, the North American Vertical Datum (NAVD) of 1988, or other datum, where specified, of floods of various magnitudes and frequencies in the floodplains of riverine areas.

  • Water Surface Elevation (WSE) means the height, in relation to NAVD 1988, of floods of various magnitudes and frequencies in the floodplains of riverine areas.

  • Mine drainage means any drainage, and any water pumped or siphoned, from an active mining area or a post-mining area. The abbreviation “ml/l” means milliliters per liter.

  • Surface water means all water which is open to the atmosphere and subject to surface runoff.

  • Surface impoundment or "impoundment" means a facility or part of a facility which is a natural topographic depression, man-made excavation, or diked area formed primarily of earthen materials (although it may be lined with man-made materials), which is designed to hold an accumulation of liquid wastes or wastes containing free liquids, and which is not an injection well. Examples of surface impoundments are holding, storage, settling, and aeration pits, ponds, and lagoons.