Laying Trackbed - Part IV

By Ty’s Model Railroad - 7/19/2010 12:18:00 AM

Benchwork with almost completed foam roadbed

On Saturday I decided to tackle the bridge that will carry both the oval main line and figure-eight line of track in the rear section of the layout. For this, I purchased a set of pier girders as well as a warren truss bridge kit. With a little modification, I attached two bridge girders together using a third girder. 

A constructed plastic Warren truss bridge kit temporarily installed between expanded foam supports

When these were dry, I attached bridge sides of the warren truss kit to the girder deck. I used a few scrap pieces of styrene to add additional support to the trusses. The final look and design looks pretty decent. I placed the bridge onto my layout and used foam shims on each end so it was level with the track. I then finished with butting foam roadbed right up to the bridge deck. 

A constructed plastic Warren truss bridge kit temporarily installed between expanded foam supports

The bridge will still need to be painted to for some added realism, but this will happen at a later time. I also had to add a foam extension to the main line curve as shown in the photo below (under the 15 pound weight). This extension was the result of a measuring mistake I made early in my original planning. Thankfully this was an easy fix. Trackbed was also added at this time to both tracks at the rear of the layout.

Expanded foam track risers being weighed down with a dumbbell white it dries

Benchwork with partially completed foam roadbed

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