Deerfield & Roundabout Railway Track & Wheel Data (Revision 08-15-2011)
Additional notes for Figure C (Revision 08-15-2011)
1. A tread rim chamfer of 1/8 +1/16 -1/16 inch by 1/8 +1/16 -1/16 inch may be used instead of a tread rim radius. 2. New conical or cylindrical wheel tread contour shall be tangent to flange throat radius.