A comparison study was made on the design methods of plain concrete pavements for airport published from five organizations, Portland Cement Association in U.S.A., U.S. Federal Aviation Agency, U.S. Corps of Engineers, French Ministry of Transportation, and English Ministry of Public Building and Works. They were evaluated in view of the basic concept employed in the design method for highway concrete pavement in Japan. The thickness design charts for pavement slab in any of these methods are derived from the influence charts developed by Pickett and Ray based on the Westergaard's formula for airport pavement analysis. No substantial difference was found among these methods except the differences in loading conditions and structural features of joints.
　The authors conclude the PCA method of design may be preferable to standardize the design method in a system consistent with that of highway concrete pavement conventionally used in Japan, although some modifications are considered necessary for joints and joint layout. The five design methods studied are summarized and presented in an appendix.