Poisson's ratio can be assumed without much error on the predicted

 deflections. The following range of Poisson's ratio are suggested

 for use in elastic layer analysis:

 Material u

 Asphalt Concrete 0.30 0.40

 Limerock Base 0.30 0.40

 Sand-Clay Base 0.35 0.40

 Stabilized Subgrade 0.35 0.40

 Subgrade 0.35 0.45

15. Compare measured with predicted deflections; adjust layer moduli to

 match measured deflections, as required.