Michigan Laws 259.482e – Perimeter of horizontal surface
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Terms Used In Michigan Laws 259.482e
- Airport: means a structure or an area of land or water that is designed and set aside for the landing and taking off of aircraft, is utilized or to be utilized by and in the interest of the public for the landing and taking off of aircraft, and is licensed by the commission. See Michigan Laws 259.481
- Horizontal surface: means an imaginary horizontal plane 150 feet above the elevation established for an airport, the perimeter of which plane is constructed as described in section 2e. See Michigan Laws 259.481
- Primary surface: means an imaginary plane longitudinally centered on a runway, which plane has the specifications described in section 2b. See Michigan Laws 259.481
- Runway: means the portion of an airport designated as either of the following:
(i) An area used for the landing or takeoff of aircraft. See Michigan Laws 259.481Utility runway: means a runway that is constructed for and intended to be used by propeller-driven aircraft with a maximum gross weight of 12,500 pounds or less. See Michigan Laws 259.481
The perimeter of a horizontal surface is constructed by swinging an arc with a radius as specified by this section from the center point of each end of the primary surface of each runway of an airport and connecting adjacent arcs by a line tangent to those arcs. The radius of an arc for a utility runway or for other than a utility runway with a visual approach equals 5,000 feet. The radius of an arc for any other runway equals 10,000 feet. The radius of the arc specified for the end of a runway shall not be less than the longest radius for the other end of the runway. If a 5,000 foot arc is encompassed by a tangent connecting adjacent 10,000 foot arcs, the 5,000 foot arc shall be disregarded in constructing the perimeter of the horizontal surface.