02-20-2009, 09:17 AM
Here is a basic analysis of your bridge...
compressive strength of each pier...appx 250tons.
shear strength of deck (neglecting the strength of ties and lack of stringers)...90tons (a 4-axle diesel is around 80t)
Be advised that buckling and bending are probably where it would fail. I would consider such a bridge to be believable for small locomotives (porters, small shays, small heiselers...) but it is unsatisfactory for any modern mainline power. Weight does not scale linearly, and that is why it holds the model f-unit.
compressive strength of each pier...appx 250tons.
shear strength of deck (neglecting the strength of ties and lack of stringers)...90tons (a 4-axle diesel is around 80t)
Be advised that buckling and bending are probably where it would fail. I would consider such a bridge to be believable for small locomotives (porters, small shays, small heiselers...) but it is unsatisfactory for any modern mainline power. Weight does not scale linearly, and that is why it holds the model f-unit.
Michael
My primary goal is a large Oahu Railway layout in On3
My secondary interests are modeling the Denver, South Park, & Pacific in On3 and NKP in HO
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My primary goal is a large Oahu Railway layout in On3
My secondary interests are modeling the Denver, South Park, & Pacific in On3 and NKP in HO
<!-- m --><a class="postlink" href="http://thesouthparkline.blogspot.com/">http://thesouthparkline.blogspot.com/</a><!-- m -->