1. Engineer, Weidlinger Associates, 375 Hudson St., New York, NY; formerly, Graduate Student, Dept. of Civil Engineering, The City College of City Univ. of New York, New York, NY 10031.
2. Professor, Dept. of Civil Engineering, The City College of City Univ. of New York, Convent Ave. at 140th St., New York, NY 10031 (corresponding author).