Roger L BrockenbroughRoger Brockenbrough, P.E., is president of R. L. Brockenbrough & Associates, Inc. He was a senior research consultant for U.S. Steel, where he worked for 30 years until retiring. Mr. Brockenbrough is a member of AISC and ASTM, and is an ASCE ellow. He is the editor of Highway Engineering Handbook, now in its Third Edition, and a contributor to Standard Handbook for Civil Engineers, now in its Fifth Edition. Frederick S. Merritt, P.E. was a consulting engineer for many years with experience in building and bridge design, structural analysis, and construction management. A Fellow of ASCE and a Senior Member of ASTM, he was a senior editor of Engineering News-Record and author or editor of many books, including Standard Handbook for Civil Engineers, now in its Fifth Edition. Read More Read Less