1. Denver Challenge Professor Emeritus and Dean Emeritus, College of Engineering and Applied Science, Univ. of Colorado, Boulder, CO 80309 (corresponding author).
2. Director of Earthquake Engineering, Magnusson Klemencic Associates, 1301 Fifth Ave., Suite 3200, Seattle, WA 98101.
3. Chairman and C.E.O., Magnusson Klemencic Associates, 1301 Fifth Ave., Suite 3200, Seattle, WA 98101.