horizontal surface


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horizontal surface

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A specified portion of the horizontal plane located 150 ft above the established airport elevation, which establishes the height above which an object is determined to be an obstruction to air navigation. The perimeter of the horizontal surface is constructed by swinging the arcs of specified radii from the center of each end of the primary surface of each runway of each airport and connecting the adjacent arcs by lines tangent to those arcs.
References in periodicals archive ?
w] and RH are the monthly average of daily ambient, maximum, minimum, difference temperature ([degrees]C), extraterrestrial solar radiation on horizontal surface (MJ/[m.
Data for snails crawling on a vertical surface were collected between September and November, 2014; data for snails crawling on a horizontal surface were collected between March and May, 2015.
Extraterrestrial Radiation on a horizontal Surface.
Using the commercially available software system, Simulia, (2) intermittent contacts with a wall and a horizontal surface are modeled and computed, respectively.
The test is performed on the Crush Tester, the same as the resistance test of the horizontal surface of the board; only, the device is set at another measuring mode.
This design is for a building whose every horizontal surface is covered with planting.
An exposed fastener on the horizontal surface of the flashing is a potential leakage point.
The main difference is that an expanded laser beam with optics illuminates a line across a horizontal surface.
Place the origin on the horizontal surface at the centre of the hole in the middle of the doughnut.
Present ultraviolet exposure figures - forming the UV index - are based on how much radiation hits a horizontal surface.
Piles of documents covered the desktop and pretty much every other horizontal surface in the room.

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