Nice work. I'd like to see it placed and supporting a train in time.
I have scratchbuilt only one bridge, a trestle. It's on its second layout.
14 years ago, until the spring of 2012, it looked like this:
Now it looks like this (haven't learned how to image this layout yet, the correct angles and lighting, so....)
Yes! A good set of plans and a bandsaw were key to making mine. I found the prototype plans to be very handy in this case. I also found a set of plans on Feebay for the deck truss below. The trestle plans I found on Grandt lines website (https://www.grandtline.com/tips-techniques/resource-gallery/) which were incredibly helpful. The only difference is that I had to figure out to make it curved instead of a straight trestle.
Colorado Front Range Railroad: http://www.coloradofrontrangerr.com/
Looking good!
There are lots of modelers on here that make bridges. I'm sure they will be chiming in.
Mike.
My You Tube