Drawing introduction: This downloaded drawing is a set of design drawings for single track round ended piers of prestressed concrete beams on ballast bridge decks. The drawings include design instructions, structural drawings of piers with Lp=20, 24, and 32m on straight curves, reinforcement layout of top caps with Lp=20, 24, and 32m on straight curves, anti seismic beam fall measures for seismic zones with L=12~32m on straight curves, and fences on straight curves