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Forum topic by bruc101 posted 11-17-2008 09:41 PM 863 views 0 times favorited 4 replies Add to Favorites Watch
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bruc101

1200 posts in 3535 days


11-17-2008 09:41 PM

Ok Lumberjocks, I’ve got a project in my shop called Castle Doors for a restaurant built of stone in 1923…no need to say anymore about the perfect radius :-)
I’m into the frame now and have the radius top built with a radius of about 38 degrees. The frame will is 8 inches wide and I need to bend a 3/8” x 8” board for an inside closure panel. This board will probably need to be around 100 inches long.
I tried to upload a cad drawing but it’s not in a URL so how do I do this so you guys can see the frame?
I can make the drawing in jpg format without any problems.

Bruc

-- Bruce Free Plans http://plans.sawmillvalley.org


4 replies so far

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oldskoolmodder

801 posts in 3673 days


#1 posted 11-17-2008 10:38 PM

You can upload a jpg (or some other pic type to show us.

This sounds interesting, though I have no info on how to do it (what you are trying to do for the project I mean).

-- Respect your shop tools and they will respect you - Ric

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bruc101

1200 posts in 3535 days


#2 posted 11-18-2008 04:24 AM

Thanks guys for your fast replies..Is there anyway I can upload an image without coming from one of the photo sites? I could link it to my business site but I also have a big furniture plans section of it and I’m not on Lumberjocks to sell plans so I’ll not post my web site at anytime.

Bruc

-- Bruce Free Plans http://plans.sawmillvalley.org

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bruc101

1200 posts in 3535 days


#3 posted 11-20-2008 06:33 PM

Here’s how we did it.
This frame outside measurements are 79 1/2” wide, 100 3/8” high and 8 inches in depth. The arc in the top on the template showed us a 38 degree radius on the inside and a 41 degree radius on the outside.
To enclose the inside of the arc we needed a board at least 10 feet long to take care of the spring back and 9 inches wide.
We planed this board (Cypress) down to 3/8”. Not having a vat long enough to either soak or steam this board and living in the mountains where we have an abundance of streams one being 20 feet from the back of the shop, we put the board in the stream, put rocks on it to hold it down, and then left it over night. We also did a test piece 60 inches long to make sure this would work.
The next morning we took the test piece out of the stream and bent the board over the frame on the top side of the arc clamping it from the center out until it was flush with the frame. We left this test piece clamped over night to let it dry and hoping it would retain some of the curve in the arc.
It kept a lot of the shape so we moved it to the inside of the arc and it clamped easily into the shape of the inside.
We then took the longer board out of the stream and clamped it over the back, or outside, of the arc and left it clamped overnight also.
This morning we came in and the long piece worked just as easily as the test piece when we clamped it to the inside of the arc. The board had to fit on the outside of the frame so there was no way we could kerf the back or use a thinner board.
Maybe when I have time to figure out how to upload an image here I’ll post a photo of the finished frame when we’re done with it.

Bruc

-- Bruce Free Plans http://plans.sawmillvalley.org

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NY_Rocking_Chairs

510 posts in 3591 days


#4 posted 11-20-2008 09:25 PM

I am confused. Radius is a measure of distance, being half the diameter. Degrees (or radians) usually indicate the arc length, (degrees/360) * 2pi(radius) will give you arc length in the same units as the radius (inches or centimeters).

You could post a project and post the picture that way, call it a project in progress…

Good luck.
-Rich

-- Rich, anybody want a peanut?

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