1. Willett Professor of Engineering, Univ. of Illinois at Urbana-Champaign, 2118 Newmark Lab, 205 N. Mathews, Urbana, IL 61801.
2. Structural Engineer, Wiss, Janney, and Elstner Associates, Inc., 330 Pfingsten Rd., Northbrook, IL 60062.
3. Structural Engineer, Wiss, Janney, and Elstner Associates, Inc., 2 Trap Falls Rd., Suite 502, Shelton, CT 06484.
4. Structural Engineer, KL&A of Colorado, 805 14th St., Golden, CO 80401.