Cylindrical concrete foundations of an economical design for mounting pole-supported traffic control devices were constructed and tested in 1957 in order to determine the overturning resistance of such foundations. Results are presented of measurements of rotational creep movement over a 7-yr period. A record of the observations made throughout the test period is presented in tabular form. In general, the two methods of measurement of the rotation agree very well for the organic soil, fairly well for the granular soil and not very well for the plastic. Although moments up to 195,000 ft-lb were applied to the foundations, angular movements of less than one-half deg were observed in the two soils /plastic and granular/ considered to be good foundation material. In the very poor /organic/ soil, the short foundation deflected almost 3 deg.
Abstract