Black Bear Construction Co., Inc.
Trestle and Bridge Building Supplies for the Model Railroader
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Double Bridge
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Large Scale Conversion Table
Large Scale Conversion Table
Click on the link to see your choices.
Full Size
Inches
20.3:1
Scale
Full Size
Inches
24:1
Scale
1
0.0493
1
0.0413
2
0.0985
2
0.0833
3
0.1478
3
0.1250
4
0.1970
4
0.1667
5
0.2463
5
0.2083
6
0.2956
6
0.2500
7
0.3448
7
0.2917
8
0.3941
8
0.3333
9
0.4433
9
0.3750
10
0.4926
10
0.4167
11
0.5419
11
0.4583
12
0.5911
12
0.5000
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PO Box 26911
Austin, TX 78755-0911
(512) 467-8400 FAX:(512) 458-8765