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Reply to "New Layout vs. Old (Build Thread)"

To keep the momentum going I actually got some RR work on both weekend days. These session included finishing the left-end module, fitting up and completing an auxiliary module, and getting started on sorting out all the joists and beginning the process of attaching the sub-roadbed panels.


Here's the auxiliary module all clamped together to get the geometry right. I clamped a false leg in the corner to set the height, and clamped a 1 X 3 across the top from the existing girder to set the width. I notched the flanges on the girders so they nested together and then clamped the ends, and then was able to get the leg fashioned. On the original layout, I didn't want to keep building girders so I made a really long joist and then made it into a simple truss with a diagonal that ran back to the bottom of the girder. It worked, but it was touchy. With additional width I have now I was able to fit a respectable girder into the space to better support the inside circle.


 aux girders 2


And here it is fully fastened in. Again, I made good use of the Simpson Splice Plates for the non-square corners. For the square corner at the end, I again use the separate block screwed to one member and carriage bolts in the other direction.


aux girders 7


Then there was how to fasten the leg to the odd-angled member. I made a block that brought the angle back to square. The first time I did this, I didn't spend the time to drill pilot holes and the screws promptly split the block in two. My second attempt was much better and the pilot holes prevented splitting.


aux girders 6


Here's the block:


aux girders 3


And here's what it looked like after I blew it up.


Girder Array 4


In addition to the railroad work, my grandson and I started another model in the inventory: a beautiful Hasegawa 1:48, F-22 Raptor. The model is spectacular with beautiful cockpit, tailpipe and weapons bay details. It also has add-on photoetched for the weapons bay doors and the titanium sides of the variable exhaust nozzles. Alex did a real nice job on the pilot and the photoetched seat belts. His skills and patience keep improving. I'm reliving my childhood through him ( son was a pretty neat kid too, and a wonderful eye surgeon now).


Something else comical happened. You'll notice that block at the right-angle corner, well... I put it on, quickly, and was tightening down the carriage bolts but noticed the girder was still floppy. Then I saw it. I had put both sets of screws into the same beam instead of being 90ยบ from each other. In other words, the girder wasn't connected yet. After smacking myself in the head for rushing. I disassembled the mistake, drilled clearance holes on the correct face for the 9 X 2-1/5 Deck Screws and then reattached it correctly. Now the girder was solid.


aux girders 5


In the picture you can see the wrong holes too. If that's not proof that I'm not perfect I don't know what is, although I suppose you could ask my wife


I also build some other auxiliary girders to fill the corners. Again, in the original version I used elongated joist cantilevered out into the curve. Since I've gotten so good at making girders, and have the extra material to do so, I just knocked a few out. Here they are:


Corner Girders 2


aux girders 1


When I disassemble the back table and incorporate it into the layout, I'll make some more small girders to fill in the back right corner.


And then finally I started working on joist placement, and figuring out how best to use the old joists. After reviewing their status, I'm going to have to redo the placement of the risers and how their fastened. In the 2nd iteration I resorted to using furring strips for the 1 X 3 joists, but they're not milled and the edges are not square so they don't make such terrific joists. Furthermore, I used a Simpson wide-head, phillips screw that was quite long enough. This resulted in a sub-par assembly. I'm going to redo all of them. The riser shoe top should be 42-1/2" off the floor. I'm going to set them up using a water-level so they'll be at the same height over the entire room. It takes time, but it's not particularly hard...mostly production line stuff.



Joist and Risers 01



Images (9)
  • Joist and Risers 01
  • aux girders 7
  • aux girders 6
  • Girder Array 4
  • aux girders 5
  • aux girders 3
  • aux girders 2
  • aux girders 1
  • Corner Girders 2
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