Figure 3-15.-Runway approach zone.AIRFIELDSRoad construction and airfield construction havemuch in common, such as construction methods,equipment used, and sequence of operations. Each roador airfield requires a subgrade, base course, and surfacecourse. The methods of cutting and falling, grading andcompacting, and surfacing are all similar. As with roads,the responsibility for designing and laying out lies withthe same person-the engineering officer. Again, aspreviously said for roads, you can expect involvementwhen airfield projects occur.In this section, you will be introduced to airfieldsand airfield terminology. More information on airfieldswill be discussed in a later chapter of this TRAMAN.AIRFIELD TERMINOLOGYFigure 3-14 is a plan view of a small advanced-baseairfield. Afield of this type is constructed for operationaluse in a combat area. It contains a minimum of servicingfacilities and is not intended for permanent occupancy.Some of the terms shown in the figure are defined asfollows:APPROACH ZONE. A trapezoidal areaestablished at each end of a runway. The approach zonemust be free of obstructions on the plane of a specificglide angle. (See fig. 3-15.)APRON. A stabilized, paved or metal-plank surfacearea, designed for the temporary parking of aircraft3-15
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