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So if I want to add these to a 3 track NTRAK module would the 4 track version be about right for the 1 1/2 inch track spacing? I'm assuming the 59 foot dimension is an inside measurement. That would be 4.42 inches?Martin Myers
What’s the truss height on the Pennsy bridge?
6'-0" for the four track, 7'-0" for the five track per the PRR diagrams.
The proto 4-track bridge was designed around a 13' track center spacing - three center-to-center spaces works out to 39' proto, or just under 3" at scale. So a three-track arrangement on 1 1/2" centers should be within a scale foot of the intended proto clearances.
I wasn't planning on adjusting the height of the truss just for the 5 track version--it was basically a T-track 4-track bridge that I noticed was close the the Pennsy 5-track dimensions. I could if there's a huge outcry.. oh damn I probably will just because it will bother me if I don't.