Ron Kuykendall built his railroads that way. He even cut into the doors to build above and below the track scenery. His layouts can be seen on a video from Allen Keller Productions.Russ Bellinis said:If you want to go around the walls with a sectional layout, hollow core doors might be the perfect choice for benchwork. You could lay track, scenic a door, and install it, then get another door to do the next section, etc. At 27 to 30 inches wide, they would be an ideal width for most sections.