The gradual change from allowable stress design to the new Load and Resistance Factor Design (LRFD) approaches (as recommended by forthcoming AASHTO draft specifications) has made all current bridge design reference works obsolete. This detailed guide to bridge design in the USA covers both old and new approaches, and addresses the current US need for 70,000 new bridges in the next 15 years.
以下为对购买帮助不大的评价