1. Professor, Dept. of Civil Engineering, The City College of the City Univ. of New York, New York, NY 10031.
2. Engineer, Ammann and Whitney, New York, NY 10014.
3. Director, Bridge Evaluation Services Bureau, New York State Dept. of Transportation, Albany, NY 12232 (corresponding author).
4. Principal, Applied Research, Weidlinger Associates, New York, NY 10014.
5. Deputy Chief Engineer, Div. of Bridges, New York City Dept. of Transportation, New York, NY 10038.