Meanwhile, over at the entrance door, a lift up build has been going on. On layout I, I had a simple plywood "T" shape with a couple of plate girder bridges on it. Each end sat on wood blocks that were adjustable, for track alignment.
Worked pretty good, except, during weather swings. With everything being wood, on the expansion cycle, I would have to sand the end of the T for the bridge to fit. Then, on a contraction cycle, the gap would be pretty big, I was amazed at how big a gap trains would negotiate.......
Anyway, on this layout, I wanted to try and eliminate all the expansion/contraction that I could, so I figured something all metal.
With weight a consideration, I would build as much of the lift up that I could out of aluminum.
I fashioned alum. ends for the benchwork I found these slides that extend 36 inches, for a total overall rise of over six feet.
The slides, being steel, are pretty heavy, and I didn't want their weight hanging on the benchwork, so I installed adjustment feet at the bottom.
I installed 1x1 alum. angle around the perimeter of the alum. panels for rigidity.
I did the same for the top piece, 1x1 down the sides and a piece of 3/4 X 3/4 steel angle iron down the center to help get the bow out of it.
1 x 1 angle across the end of the top piece bolt it to the panels on the slides.
Looking at a cross section view of HO code 83 rail, that's pretty small, so I figured doing oversized mounting holes for the slides to benchwork, panels to slides, and top piece to slide panels would give me enough adjustment.
I need foam on the top piece to bring the track up to grade, but gluing it on alum. was a concern. I experimented with a scrap piece of alum., taking a piece of 120 grit sandpaper to scuff up the surface, then cleaned it with alcohol. Foam safe adhesive, some weight and two days later, I tried to pull the foam off the alum. It took a little bit of effort to break it loose, but did make me wonder if I was going to have problems later on. I do have several pieces of plywood left over from the benchwork, so I bolted one to the top piece to glue the foam to.
Wonder if the adhesive needs the help of porosity to function?
The 1x4 underneath gives my hand something to lift on. There is a catch on each side, made from 1x1 angle, (by the door handle.)