1. Engineering Associate, Wiss, Janney, Elstner Associates, Inc., 245 First St., Ste. 1200, Cambridge, MA 02142-1292. E-mail: dschnerch@wje.com
2. Distinguished Professor of Civil Engineering and Construction, and Director of the Constructed Facilities Laboratory, Dept. of Civil, Construction, and Environmental Engineering, North Carolina State Univ., Raleigh, NC 27695-7908.