arema manual for railway engineering chapter 8

Part 18, Elastomeric Bridge Bearings was moved to Chapter 15 in 2001. Part 9, Reinforced Concrete Trestles was deleted from the manual in 1971. Part 8, Rigid Frame Concrete Bridges was deleted from the manual in 1975. However, when historical recommendations differ from the recommendations contained in the latest published edition of the chapter, the recommendations of the latest published edition of the chapter should be used. For purposes of determining historical recommendations under which an existing structure may have been built and maintained, it can prove useful to examine previous editions of the chapter. The latest published edition of the chapter should be used, regardless of the age of an existing structure. This chapter is published annually, incorporating revisions made in the previous year. Professional judgment must be exercised when applying the recommendations of this chapter as part of an overall solution to any particular issue. These recommendations are intended for routine use and might not provide sufficient criteria for infrequently encountered conditions. The recommendations contained herein are based upon past successful usage, advances in the state of knowledge, and current design and maintenance practices. This chapter is presented as a consensus document by a committee composed of railroad industry professionals having substantial and broad-based experience designing, evaluating, and investigating Concrete Structures and Foundations used by railroads. Additional special provisions for speeds higher than those listed above may be added by the Engineer as necessary. Speeds of freight trains up to 80 mph and passenger trains up to 90 mph.Normal North American passenger and freight equipment, and.The material in this chapter is written with regard to typical North American Railroad Concrete Structures and Foundations and other structures mentioned herein with CHAPTER 8 CONCRETE STRUCTURES AND FOUNDATIONS1 FOREWORD

Arema manual for railway engineering chapter 8