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Dealing with contoured bracing
Ken Cierp

Total Topics: 58
Total Posts: 2271
I am not sure were I picked up this idea --- but it sure has saved me a lot a time and $$$ over the years.

Could be of use to some of you. Ken KMG

Jun 14, 06 | 10:48 am

Total Topics: 25
Total Posts: 113
Great idea, Ken. It caused me to think of another possibility (although as of yet untried).

A while back, I built an 'N' scale model railroad. To make gradual and subtle elevation changes on the rails, you can buy foam strips in various angles, each about 24" long. These could be used in the same fashion as the index cards, 'possibly' making the achievement of a consistent angle even easier.



Jun 14, 06 | 4:10 pm
Ken Hundley

Total Topics: 40
Total Posts: 2169
Now that is a cool idea!

Jun 27, 06 | 4:01 pm

Total Topics: 13
Total Posts: 89
I'm using the method from Cumpiano book where you make the 'worksheet shim' using paper with 1/8" thick cork around the rim edges to make the approximate correct consistency.

I like the idea of the index cards as well, but no ability/desire to build/buy the suction table method -


Jun 30, 06 | 10:29 am

Total Topics: 19
Total Posts: 244
Will the foam compress under the pressure needed to glue? Is it closed cell foam that's pretty firm? I'd hate to see someone glue up their back or top to find the substrate had compressed to a different shape.

I guess like so many other things... a "test on scrap" might be in order first?

Sep 24, 06 | 8:23 am
Ken Cierp

Total Topics: 58
Total Posts: 2262
Here’ is the rule I follow --- if the adhesive squeeze out does not look the same all the way around the part being glued something is wrong. I have found that the card/shim method works best for me because it is customized to follow the exact contour of the brace that is being used. How does one know if the brace supplied is precisely a 28 or 15 foot radius? If you are using a radius dish to contour the braces, a problem can also occur if you are rocking or spinning the brace while sanding to get it to match the contour of the dish. What results is a radius on the narrow edge of the brace --- the gluing surface. It appears that the brace is not seated but in fact it is not flat on the bottom --- no matter how hard you clamp it will not seat properly. Years ago I used something like the “Robo” sander, the brace was clamped to a radius template then slide along a follower. I believe there is a description of the fixture in David Russell Young’s book.


Sep 24, 06 | 8:50 am

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