FAA Regulations - Laserfiche WebLink

Home

6/24/75 AC 150/5300-4B • CHAPTER 12. AIRPORT PAVING 62. GENERAL. Airport pavements are constructed to provide adequate support for the loads imposed by airplanes using the airport and to produce a smooth, all-weather surface, free from dust or other particles that may be blown or picked up by propeller wash. Some airports may not require paved operational areas. Conditions at the site may be adaptable for the development of a turf surface adequate for limited operations of small airplanes. It may be possible to construct an aggregate -turf surface by improving the stability of a soil with the addition of aggregate prior -to development of the turf. In most areas, however, it is not possible to provide and maintain a stable turf surface because of adverse weather conditions or high -traffic density. Under these conditions, construction of an all-weather pavement is necessary. a. Pavements for airplanes under 12,500 pounds gross weight normally consist of locally available material with a bituminous surface course. To produce such pavements the coordination of proper design, construction, and inspection is required to assure the best combination of available materials and a high standard of workmanship. b. Pavement courses are described as follows: (1) Surface courses include portland cement concrete, bituminous concrete, aggregate bituminous mixtures, or bituminous surface treatments. (2) Base courses consist of a variety of different materials which generally fall into two main classes, treated and untreated. The untreated bases consist of stone, slag, caliche, gravel, limerock, shell, sand -clay, coral, or any one of a variety of other approved materials. The treated bases normally consist of a crushed or uncrushed aggregate that has been mixed with cement or bitumen. (3) Subbase courses consist of a granular material or a stabilized soil. 63. STAGE CONSTRUCTION. a. Pavements by their nature can be constructed in stages, which may be advantageous when development funds are limited. Sponsors and engineers should be cautioned that the desire to provide immediate high -quality paved surfaces such as portland cement, concrete, or a hot -mix asphalt should not be accomplished at the expense of effi- cient drainage, proper grading, and adequate subbase and base course construction. Inadequate provision or recognition of these items may cause the loss of costly surface areas through frost action, water damage, or erosion. On the other hand, a properly con - Chap 12 Par 62 Page 73