Bill,
First, yes they make 5/8's ply. I have two sheets stashed someplace, if
you happen to be in the area, I'll help you load them up! ha I used
mostly 1/2 AC or BC plywood on the layout. I occasionally walk on it,
and as you know I'm on the chubby side! I typically have cross bearers
every 16-20".
When my home was built roof sheathing was often 3/8" CD. Later when I
added my trainroom 1/2" was considered standard. When we later added a
kitchen addition we specified 5/8"CD. I don't know how much of that was
just better standards or it might be because 1/2" was actually made
thinner over the years. I think one needs to consider the quality of
the wood, the ply's as well as, the thickness. They do make plywood
with more layers (same relative thickness) but would guess that it's
mega bucks! I do remember Charlie Sanderfield's layout in his company's
location where they used birch plywood, which is common wood for trade
show displays. Several layouts recently constructed here have been with
that quality of wood.
When it comes to ground throws via slide switches, I've not had any of
the problems that Dick has mentioned. Many of mine have been in for 15+
years. We also use them exclusively on our modules and they are mid
80's vintage also. In latter years the quality of them (Radio Crud) has
been lacking but I search out older versions.
Using the router might be a very good solution to make a precise hole.
Another way might be to fasten your choice of motor to a thin sheet of
plywood or better yet clear Lexon that would extend into the area above
the throw-bar itself. This way all the machines could be made up on a
workbench beforehand. One then could route a fairly large hole under
the draw-bar area. Next make up a "plug" that would be tack glued to
that thin piece of plywood/Lexon with the hole drilled in the proper
place (middle or either edge). After everything is in place permanently
caulk the plug to the layout decking and add you ballast to it. If you
ever have to remove the switch motor the temporary glue bond could be
broken without disrupting the ballast above.
Bob Werre
BobWphoto.com
>
> Dick & All,
> "
> homasote roadbed above that. I guess this might be a lot to ask of any
> switch machine to work through that thickness. I just got a 2 HP plunge
> router. I can possibly use that to make the needed holes. The turnouts may
> remain as ground throws for a while but at least I will have made them
> switch machine ready.
>
> I wanted to use better quality ¾" plywood for the deck for stability. I am
> not overly concerned with weight here as these frames are not going to
> be to
> S-Mod. Is there a 5/8 plywood? Or I could use ½" but that is as thin
> as I am
> going to use.
>
> Thank You,
> Bill Lane
>
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