So it’s been a while since I posted anything on my viaduct project. For those of you unfamiliar with the history of this, you can read it in these earlier threads:
Okay, gonna need some help on this project as it progresses…
Bridges…
Does anyone know the clearance under this bridge?
Current Status of my Viaduct Project…
Anyway, the last I posted was that I had glued the skins on the “problem” curve and on the 40" straight. I still had the 2 30" straights to do, plus I needed to cut out the arches for the remaining curve. Here’re two shots of one of the 30" platforms being glued:
Since the arches for the remaining curve were going to essentially be one half of an ellipse, I decided to see if I could find a way to trace it properly. I did, using the method shown at the following link:
Looking Good !
This might seem a bit off-da-wall but what about using expanding foam to fill in the arches ? After it cures rough cut excess with a coping saw then fine tune the cut with a hot knife. A skim coat of plaster or joint compund to fill air bubbles then prime. Believe Krylon puts out a series of paints that when dry look like stone, concrete, etc.
Really looking great !! This is really a great thread, it should be saved somewhere, or sent to CTT for publication!
Great looking work.Please keep posting pics of your progress.
Hey, that brings back memories. Looking good. [;)]
Now, take a trip to the floor store. They ship vinyl rolls in hard cardboard tubes. This is what I used for my arch linings. You’ll make a cut down the center. Turn your viaduct over, peel the tube open, rough it across each arch, and mark the interior. The cardboard tube may “shell” but you are only worried about the interior of the material anyhow.
nice job and thanks for sharing your neat construction techniques
DJ, Dude, that is pretty cool! I like the idea of the expanding foam to fill in the arches. The set up looks great. Excellent thread!
Bob.