Symbols and Nomenclature
Nominal track gage on tangent track, centerline to centerline of rail
of a two-rail-system or centerline to centerline of track of a four-
Gage at any P.C.C. of Transition Curve.
Reduced gage for a given radius.
Reduced gage at S.C.T.
Reduced gage at P.C.T. or T.C.
Rate of grade of inside rail.
One half equivalent length of crane.
Crane gage (also normally tangent track gage).
Lateral movement of crane tracks.
One-half maximum lateral float capability, where maximum float equals
sum of float in either direction.
Point of Tangent to Switch (fixed) Curve.
End of Switch Curve and beginning of Flexible Transition Curve (on
Point of Compound Curvature (common point of any two successive
circular arcs of transition).
Point of Compound Transition (on inner alignment where no main
circular curve is employed).
End of Transition Curve (point of Transition Curve to main circular
Length of lead of inner Switch Curve over outer Switch Curve.
Short tangent length between outer Switch Curve and outer Flexible
All dimensions are given in feet, except angles are in degree -
minutes - seconds