Railroad Bridges

Railroad Bridges 23.1 Introduction Railroad Network • Basic Differences between Railroad and Highway Bridges • Manual for Railway Engineering, AREMA 23 23.2 23.3 23.4 Railroad Bridge Philosophy Railroad Bridge Types Bridge Deck General • Open Deck • Ballast Deck • Direct Fixation • Railroad Bridges 23.1 Introduction Railroad Network • Basic Differences between Railroad and Highway Bridges • Manual for Railway Engineering, AREMA 23 23.2 23.3 23.4 Railroad Bridge Philosophy Railroad Bridge Types Bridge Deck General • Open Deck • Ballast Deck • Direct Fixation • Deck Details 23.5 Donald F. Sorgenfrei Modjeski and Masters, Inc. Design Criteria Geometric Considerations • Proportioning • Bridge Design Loads • Load Combinations • Serviceability Considerations W. N. Marianos, Jr. Modjeski and Masters, Inc. 23.6 Capacity Rating General • Normal Rating • Maximum Rating 23.1 Introduction 23.1.1 Railroad Network The U.S. railroad network consists predominantly of privately owned freight railroad systems classified according to operating revenue more