International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 260
ation ofgrade at the P. T.,at Sta. 49 + 75, is142.90095 + 6.3811 =149.28205 ft., which werecord on the profile to-gether with the grade,+ 1.1002. The end ofthe line is at Sta. 53,giving a tangent of225 ft. = 2.25 stations.The rise on this tan-gent is 1.4302x2.25 =3.21795 ft., which weadd to… … 850 RAILROAD LOCATION. The points where the changes of grade occur are marked onthe profile in small circles, which are connected by fine lineswhich represent the grade line. These points of change areprojected on a horizontal line at the bottom of the profile.Those portions of this line…
Railroad engineering
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