1. Des. Engr., Alfred Benesch and Co., 205 North Michigan Ave., Ste. 2400, Chicago, IL 60601.
2. Asst. Prof., Univ. of Wisconsin, 2312 Engineering Hall, 1415 Engineering Dr., Dept. of Civ. and Envir. Engrg., Madison, WI 53706.
3. Res. Struct. Engr., Turner-Fairbank Hwy. Res. Ctr., 6300 Georgetown Pike, McLean, VA 22101.