Standard S3.5
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National Association of S Gaugers, Inc.
Engineering Group

Standard S3.5:     Track - Narrow Gauge

Track Gauge minimum

Gmin

0.563"                   14.30mm

Track Guage maximum

Gmax

0.585"                   14.86mm

Check Gauge minimum

Cmin

0.519"                   13.18mm

Span maximum

Smax

0.478"                   12.14mm

Flangeway maximum

Fmax

0.050"                   1.27mm

Flange Height minimum

Hmin

0.030"                   0.76mm

Point Spread maximum

Pmax (E) Electrical

0.499"                   12.68mm

Notes:

  1. For further information on Track & Wheels, see NASG Standard S3 & S4 Help File.
  2. Recommended Wheel Contour is NMRA RP-25 code 110.
  3. Adopted by the NASG - September 1998.

  Drawn by Randy Wilson - 20 October 1998

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