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Track & Wheel Standards
Basic Design Dimensions for 7ft 0-1/4in gauge
These standards are for GWR Brunel 7ft 0-1/4in broad gauge. Use these links for Standard Gauge (4ft 8-1/2in) or Irish 5ft 3in gauge standards.
The BG7 standards were compiled many years ago by the pioneers of modelling the Broad Gauge in 7mm scale, and have stood the test of time. The Broad Gauge Society can provide track and back-to-back gauges manufactured to these standards.
The ScaleSeven Group acknowledges the assistance of members of the BGS in providing these standards.
All dimensions are in millimetres.
Track |
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Track Gauge |
Min |
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49.20 |
Track Gauge Widening |
Max |
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0.45 |
Check Gauge |
Min |
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48.18 |
Crossing Flangeway |
Min |
|
1.00 |
Between Check Faces |
Max |
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47.28 |
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Wheels |
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Effective Flange Thickness |
Max |
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0.66 |
Back-to-Back |
Min |
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47.40 |
Tyre Width |
Min |
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2.92 |
Back-to-Back + One Effective Flange Thickness |
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48.16 |