Flue rack post and roof support
Rail
Roof supports Laminated post
Bottom 12″ of post mounted in the layout base
G.M. MCKENZIE: DURANGO, CO ; 1972
laminations, of five pieces of stripwood glued together.
ARTWORK: G.M. MCKENZIE
The three-dimensional illustration (above) demonstrates how the four rack supports were constructed. The 8′-0″ long railroad rails were slipped through formed openings. They were centered and then secured with cyanoacrylate. Note how the two triangular roof supports are attached to the notches designed in the outer timber pieces.
pieces of bass wood. The reason they were 5″ wide was that was the width of the base of the code 70 rail pieces I planned to use as cross pieces. Since the lower end of each post was going to be buried in the scenery about a foot deep, I made them about 96″ long. The posts are actually “sandwiches,”
or Flue rack
There are three scale 96″ long pieces with shorter pieces alternately spaced between them. The shorter pieces are spaced to create an opening for the rail to be slipped through later. The first of these holes is set at 48″ from the bot- tom of the post; then a gap equal to the height of the rail; then a 18″ piece of wood was added next, then another gap for another piece of rail. A short piece of wood was added next until the 96″ length was reached. The finished post ends up being 12″×25″×96″. Now that the supporting posts were assembled, I added additional details to their ends. I still had a good supply of tiny ¹/₄″ steel brads. To prevent split- ting the bass wood posts, pilot holes were drilled with a No. 77 drill. The brads were pressed into place using
Full size for O scale: 1/4″ = 1′-0″; 1:48 17′-4″
the same pair of pliers I’ve used to hand-lay track. These brads represent large lag screws or bolts that would have been used by railroads to hold the laminations together.
Triangular roof supports made from
5″×20″ stripwood were carefully cut on a miniature table saw and glued in an 8″ notch cut into the outer edges of each post creating a rabbit joint for added strength. Each post received two of the 8′-8″ long formers which were centered on each post which left about 46″ of covered space over each side of the rack. At this point I realized that I had forgotten to add diagonal braces to support the triangular roof supports. However, if they were in place, they would have hindered access to the boil- er flues sitting on the rails. Instead of diagonals, I decided to make gusset plates out of thin brass
Drawn by G.M. McKenzie
2′-1″ 16′-10″
2′-10″
12″
RAILROAD MODEL CRAFTSMAN
59
8′-0″
9′-0″
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