Triang Standard

Intermediate Standard

Fine Standards

Full

Size

3mm

Scale

12mm gauge

Dimension

12mm gauge

Dimension

12mm

gauge

Dimension

13.5mm

gauge

Dimension

14.2mm

gauge

Dimension

WHEELS

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

a. Outer faces

5’ 4¹/₂”

16.125

15.45

15.95

14.30

15.00

13.90

14.20

15.40

15.75

16.00

16.30

b. Back to back

4’ 5¹/₂”

13.375

10.10

10.35

10.65

12.15

12.75

10.05

10.15

10.30

10.40

10.60

10.70

12.10

12.20

12.70

12.80

c. Total width

5¹/₂”-6¹/₂”

1.625

2.70

2.90

2.00

2.30

1.65

1.75

1.65

1.75

1.65

1.75

d. Flange width

1¹/₈”

0.28

0.65

0.75

0.40

0.60

0.30

0.40

0.30

0.40

0.30

0.40

e. Flange depth

1¹/₈”

0.28

0.80

1.10

0.50

0.75

0.50

0.55

0.50

0.55

0.50

0.55

f. Flange/tread

     radius

0.20

0.25

0.20

0.25

0.20

0.25

0.20

0.25

TRACK

v. Gauge

     (plain track)

4’ 8¹/₂”

14.125

12.00

12.20

12.00

12.10

12.00

12.10

13.50

13.60

14.10

14.20

v. Gauge

4’ 8¹/₂”

14.125

12.05

12.025

12.025

13.525

14.125

     (pointwork)

12.00

12.10

12.00

12.05

12.00

12.05

13.50

13.55

14.10

14.15

w. Check rail

4’ 6³/₄”

13.69

10.90

11.05

11.20

12.70

13.30

     gauge

10.85

10.95

11.00

11.10

11.15

11.25

12.65

12.75

13.25

13.35

x. Check rail

1³/₄”

0.44

1.10

0.95

0.80

0.80

0.80

     gap

1.00

1.15

0.90

1.00

0.75

0.85

0.75

0.85

0.75

0.85

y. Outer clearance

⁷/₈”

0.22

0.35

0.85

0.40

1.00

0.50

0.85

0.50

0.85

0.50

0.85

z. Inner clearance

¹/₂”

0.125

0.10

0.45

0.10

0.40

0.10

0.40

0.10

0.40

0.10

0.40

The bold values for b, v, w, and x are the optimum dimensions.

Prototype dimensions are given in feet and inches. Model dimensions are in millimetres.