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Old 12-06-2018, 10:07 PM   #21
mcleod4569
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That size will be perfectly manageable. My portable boards are a similar width but range from 4í to 6í in length and are easily shifted around.
I would go with 9mm ply with a suitable frame .
Would it really need a frame if it is just sitting on a desk?
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Old 12-06-2018, 10:11 PM   #22
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Well I was hoping that I would be able to move it around if needed be so I guess rubber feet would be the way I would go. It wasn't going to be physically attached to the desk.
I have arthritis and can't stand up for very long. I build my railways on top of B&Q kitchen units (without legs) so I can work either from my office chair or my powered wheel chair. So that I can lift the boards to work underneath, I use 5mm foam core (obtainable from any art shop). I make the sides 3" high to accommodate Cobalt point motors and build, firstly, in sections to the length of the boards and up to 2' wide. Once built and strengthened with bracing 3" high every 10" - 11" in both directions, I fix the boards together making one large board. My previous layout was 14' 6' x 2' and all in one length. I could easily lift this up and work underneath, all in one piece.

Once braced, the whole thing is very strong and sturdy. I have had to move out of my hobby room (hence the demise of the 14" layout) and am now ensconced in our bedroom where my new 6' long N gauge layout straddles both my computer desk and part of my wife's dressing table - a good girl is my wife!



You see what I am doing on my Pennvale Blog.

I do have some special tools for working with foam core but all they do is make cutting straight lines easier and ensuring that the cut is vertical.

David
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Old 12-06-2018, 10:59 PM   #23
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Would it really need a frame if it is just sitting on a desk?
Just a sheet of ply is likely to twist or warp. A frame so say 2"X1" planed timber will stop that from happening.
Remember that track should always be level and flat or poor running will result.
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Old 13-06-2018, 08:07 AM   #24
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Think Steve meant 2x1" not 2x11, that would be a bit heavy
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Old 13-06-2018, 08:11 AM   #25
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I did mean 2x1. Use the other and you could put the desk on the layout.
Original post amended.
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Old 13-06-2018, 07:46 PM   #26
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The size of board I am looking to do is only about 110cmx50cm. Would plywood weight be an issue at this size? Also are there any advantages of 12mm over 9mm?
I have just laid flexi track onto a board @ 600mm that was tight (allowing for use with any stock)-ask the professional types here about safe radii to run stock on.......
At 110x60cm (assuming that is larger than the desk top)
I would fit four pieces of L shape Ali extrusion (13mm approx)
To fit the edge of the table as such that you cannot push the panel off the desk.

Then as suggested by another, wires etc above ground......
Job is very much a good one!

I can guarantee that even in adverse conditions (humidity/temp)
There is no flex/warp of the board (+24months from time constructed)

Although it wasnít purposed for a train it is eminently suitable.

(Also worth noting)
Stock sheets can be bought at 1200x600mm (120x60cm)
If it will fit in your space, you may as well use a sheet at stock size.

It will save the hassle of cutting plus youíll end up with more space for.........
I donít know! Trees/track/buffer stops........etc.etc.

The only advantage would be 14mm track pins need not be cut! As the points would not peep through to the desk.
More rigidity.
More weight (approx 25%) but itís only peanuts on a sheet this size.

In any case, youíd still need some form of bracing.

4 lengths of Ali and a stock sheet at 120x60......you should get change from £20.
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Old 14-06-2018, 06:05 PM   #27
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Just a sheet of ply is likely to twist or warp. A frame so say 2"X1" planed timber will stop that from happening.
Remember that track should always be level and flat or poor running will result.
Where might be the best place to get plywood sheets? Would places like B&Q or Homebase do?
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Old 14-06-2018, 07:28 PM   #28
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Yes,unless you have a local Sawmills. 9 mm, with 2x1frame. John
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