60kn, and a venter test not less than 60kn, 60kn, and a venter test class of i, ii or iii. and a wetdry venter class of i, ii or iii. test class of i, ii or iii. soluble salts strength (cbr) cbr at 93 of modified cbr at 93 of cbr at 93 of modified aashto density shall be at modified aashto aashto density shall be at.