cookie cutter

[csxnscale]

Hi,

I plan to use the cookie cutter method with 1/4" plywood on the benchwork.
Do i need foam on top of the cutted plywood or can I glue cork on top of the plywood without the foam?
What about noise?

Paul

 

[Catt]

You should have no problem with gluing the cork directly yo the plywood.

 

[Ray Marinaccio]

How much support will your benchwork provide?
Unless you provide enough support under(or above) the 1/4" plywood you may have a sagging or warping problem.
On this layout ai'm working on now the benchwork has a 1'grid supporting a 2" foam cookiecutter subroadbed. Overkill? maybe, but a good foundation will save a lot of headaches in the long run.

 

[MasonJar]

I will echo Ray's comment that with 1/4" ply, you might find things a little too flexible. I used cookie cutter with 5/8 ply, plus a grid base on 16" centres.

I plan on putting cork right on the plywood.

You might want to glue a layer of 1" foam over the 1/4" ply to make it more rigid.

Andrew

 

[csxnscale]

First, thank you all for the answers.

The 1/4" plywood I would like to use is scrap from my job. It was used in a container to separate different loads.
I have four 3' by 6' pieces and I used one to build a flat test layout in N-scale. I made the benchwork, screwed the plywood on it and glued 1" thick extruded styrofoam on top of the plywood. Than I glued the track on top of the styrofaom. It was very sturdy and that is why I was thinking of using the cookie cutter idea with the other plywood.
I think in N-scale with support every 10" from the benchwork below it must be possible, at least I'll give it a try.
With a small layout size of 3' 8" by 7' and enough support I think I can use the thin plywood and glue the cork on top of the plywood.

Paul

 

[garyn]

For the 1/4" plywood, 10" spacing of the support from below should be OK. Mine is supported at 17" spacing and it DOES sag. At this point all I can do it shove another 1x2 under the plywood in between the existing 1x2 support.

Gary

 

[csxnscale]

Thanks Gary,
Good to hear your sagging problem can be cured easely.

Paul

 

[Ray Marinaccio]

Gary, Do you think spraying that expanding foam under the layout at your trouble spots might help the sagging problem?