Black Bear Construction Co., Inc.
Trestle and Bridge Building Supplies for the Model Railroader
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Wood Sizes to Use
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Double Bridge
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The Track Approach
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Wood Sizes to Use
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O Scale Conversion Table
O Scale Conversion Table
Click on the link to see your choices.
Full Size
Inches
O Scale
Inches
Full Size
Inches
O Scale
Inches
Full Size
Inches
O Scale
Inches
1
0.0208
10
0.2083
19
0.3958
2
0.0417
11
0.2292
20
0.4167
3
0.0625
12
0.2500
21
0.4375
4
0.0833
13
0.2708
22
0.4583
5
0.1042
14
0.2917
23
0.4792
6
0.1250
15
0.3125
24
0.5000
7
0.1458
16
0.3333
25
0.5208
8
0.1667
17
0.3542
26
0.5417
9
0.1875
18
0.3750
27
0.5625
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PO Box 26911
Austin, TX 78755-0911
(512) 467-8400 FAX:(512) 458-8765