Deerfield & Roundabout Railway Track & Wheel Data
(Scroll down for drawing notes. Revision 09-01-2004)
Notes for drawing DRTRK3 Figures A, B1, B2, C and Table No. 1 (Revision 09-21-2007)
Other D. & R. Ry. drawings may, with specific instructions, supersede provisions of Drawing DRTRK3.
1. Tolerance "A" shall be specified on plans for frogs and guard rails that use a filler or separator in the flangeway.
2. Tolerance or limit "B" is not specified as any dimension under standard consistent with other specified dimensions and tolerances will give clearances.
3. Tolerance or limit "C" is not specified as any dimension over standard consistent with other specified dimensions and tolerances will give clearances.
4. Tolerances with the suffix "W" indicate the tolerance is the limit of wear for that dimension.
5. An extended wear flange width of not more than 3/16 inch may be used for the wheels of a wheel set that is consistent with an outside gage of flanges of not more than 7 7/16 inches, and an inside gage of flanges of not less than 7 1/16 inches.
6. The minimum Gage of Unguarded Track shall not be less than designated below:
Tangent to and including 150 foot radius curved track,
track gage shall not be less than 7 1/2 inches;
Curved track less than 150 foot radius to and including 80 foot radius curved track,
track gage shall not be less than 7 9/16 inches;
Curved track less than 80 foot radius to and including 60 foot radius curved track,
track gage shall not be less than 7 5/8 inches;
Curved track less than 60 foot radius to and including 45 foot radius curved track,
track gage shall not be less than 7 11/16 inches;
Curved track less than 45 foot radius, track gage shall not be less than 7 3/4 inches.
Note: The Gage of Unguarded Track shall also apply to track having emergency guard rails only.
7. Except as provided by Note No. 8, the top surface of a guard rail, or guard portion of a track structure, shall not be more than 1/32 inch below, or more than 9/32 inch above, the running surface of the nearest running rail or track structure.
8. The top surface of a guard rail, or guard portion of a track structure, that is less than 1 inch from the gage surface and on the field side of a running rail, or a track structure, shall not be above the running surface of the running rail, or the track structure.
9. Portions of a wheel, or any part of rolling equipment, that is outside of the width of a wheel at the running surface, or is more than 1 inch from the tread of a wheel, shall not be lower than the guard clearance line.
10. The taper of a flare shall not be more than 5/32 inch in 1 inch for frog wing rails or not more than 3/32 inch in 1 inch for guard rails.
11. The Guard Flare Gage shall be 7 inches +1/16 inch -1/4 inch. See Drawing DRTRK7.
12. The Switch Point Spread shall conform to the Guard Flare Gage.
13. New wheels shall conform to permissible wheel tread and flange contours and shall be free of sharp edges, steps and excessive chatter marks.
14. The distance back to back of flanges of a wheel set shall not vary more than 1/32 inch.
15. The wheels of a wheel set, or wheels in the same driving wheel base, shall not vary in diameter more than 1/64 inch and shall not vary in tread taper more than 1 degree.
16. Wheels may be of solid or tired design, and materials for wheels and axles shall be suitable for the intended service.