. Transition curves. A field book for engineers, containing rules and tables for laying out transition curves . Fig. 4. If there are two circular curves of dif-ferent radii, their ends will be a short dis-tance apart, the sharper curve being on theinner side, which can then be eased off tounite with the other curve. See Fig. 5. On railway location it may be desirableto first lay out the circular curve, neglect-ing the transition curves until the time ofconstruction. 19. Fig> 5. In this case the two terminal points ofthe transition curves should be located withtheir co-ordinates, the transit
. Transition curves. A field book for engineers, containing rules and tables for laying out transition curves . Fig. 4. If there are two circular curves of dif-ferent radii, their ends will be a short dis-tance apart, the sharper curve being on theinner side, which can then be eased off tounite with the other curve. See Fig. 5. On railway location it may be desirableto first lay out the circular curve, neglect-ing the transition curves until the time ofconstruction. 19. Fig> 5. In this case the two terminal points ofthe transition curves should be located withtheir co-ordinates, the transit set overeither point and a foresight taken on theother and the curve run in. Compound curves should not be locatedin this manner, as a backsight is then re-quired, f TRANSITION CURVE TABLES. 23TABLE I. o . o Degree ofS Curve, ft -3) 1 Co-ord Lati-tude. nates Departure. LongChord. Corrn 10 0° 0 30 0° 1 0 10,000 .000 20 0° 20 0° 1 12 0° 3 0 20,000 .004 30 0° 30 0° 2 17 0° 6 0 30,000 .007 40 0° 40 0° 3 41 0° 10 0 40,000 .014 50 0° 50 0° 5 30 0° 15 0 .029 60 1° 00 0° 7 33 0° 21 0 .045 70 1° 10 0° 9 58 0° 28 0 69,999 ,061 80 1° 20 0° 12 43 0° 36 0 79,999 .086 90 1° 30 0° 15 49 0°45 0 .126 100 1° 40 0° 19 15 0° 55 0 .168 110 1° 50 0° 23 0 1° 6 0
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyorkdvannostran
