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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

Track Gauge

Min

 

49.20

Track Gauge Widening

Max

 

0.45

Check Gauge

Min

 

48.18

Crossing Flangeway

Min
Max

 

1.00
1.08

Between Check Faces

Max

 

47.28

 

 

 

 

Wheels

Effective Flange Thickness

Max

 

0.66

Back-to-Back

Min
Max

 

47.40
47.50

Tyre Width

Min
Max

 

2.92
3.35

Back-to-Back + One Effective Flange Thickness

 

 

48.16

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