What material are airport runways made of?

A runway is a defined area at an airport, most commonly made from asphalt and concrete, for takeoff and landing of aircraft. Depending on the airport, this area could be nothing more than a strip of grass, dirt, or sand. However, most airport runways are made from asphalt and concrete.



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Typical narrow body runways usually have 11 to 13 inches (28 to 33 centimeters) of concrete thickness, and runways that serve wide body aircraft usually have 17 to 20 inches (43 to 51 centimeters) of concrete thickness.

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Widely used in a variety of concrete applications, from roads to bridges to buildings, reinforcing steel bar (rebar) is used to enhance the tensile strength of the surrounding concrete in applications such as runways and aprons.

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Answer: No, runways are not flat. They are crowned to help drain water off the sides during rain, and often one end of a runway is higher or lower than the other. When preparing takeoff performance calculations, pilots include the slope of the runway.

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The basic configurations are (1) single runways, (2) parallel runways, (3) intersecting runways, and (4) open-V runways.

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Since most runways are oriented to take advantage of prevailing winds to assist in takeoffs and landings, they can be used either direction. This is why most runways have two numbers. The second number differs by 18 or 180 degrees.

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Many airports have intersecting runways, often as a consequence of expansion but also to provide a minimal crosswind option where wind direction is variable.

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