1. Structural Engineer, Ammann and Whitney, P. C., 96 Morton St., New York, NY 10014 (corresponding author).
2. Professor, City College of City Univ. of New York, New York, NY 10031.
3. Principal, Weidlinger Associates, 40 Wall St., New York, NY 10005.
4. Director, Structures Evaluation Services Bureau, New York State DOT, 50 Wolf Rd., POD 43, Albany, NY 12232.