This chapter provides pavement design guidance for airfield pavements intended to serve only airplanes with gross weights less than 30,000 pounds (13 608 kg). Airplanes of this size are usually engaged in nonscheduled activities, such as agricultural, instructional, or recreational flying. Pavements designed to serve these airplanes may be flexible or rigid-type pavements. The design of pavements serving airplanes of 30,000 pounds (13 608 kg) gross weight or more should be based on the criteria contained in Chapter 3 of this publication. Some areas of airports serving light airplanes may not require paving. In these areas, the development of an aggregate-turf or turf surface may be adequate for limited operations of these light airplanes. Aggregate-turf surfaces are constructed by improving the stability of a soil with the addition of aggregate prior to development of the turf. Aggregate-turf construction is covered in some detail in the latter part of this chapter. Information on stabilization of soils can be found in Chapter 2 of this circular and in AC 150/5370-10, Standards for Specifying Construction of Airports.