I'm toying with the idea of building a tall, spindly trestle on my layout. For inspiration, I turned to the Kinzua Trestle in Western PA. The trestle was destroyed several years ago by a tornado, IIRC. A little research shows that there were 2 trestles built at the location. See the attached picture for the earlier one, which is what I want to use as a guide. My question is, what to use for constructing it? Plastic would definitely give me the shapes for the individual components, but may not be strong enough. I don't think wood is the way to go either. That leaves metal. What type? How to join everything?
Your thoughts, please.