Question about an arch

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Gary Puckett
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Question about an arch

Postby Gary Puckett » Sat, Apr 11 2009, 8:58AM

Does anyone know how to figure out the segments of an arch?

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Re: Question about an arch

Postby George Davidson » Sat, Apr 11 2009, 9:55AM


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Re: Question about an arch

Postby Gary Puckett » Sat, Apr 11 2009, 10:57AM

Thanks George,

But what I need is away to figure out the straight line pieces in the arch. I have to tile 3 arches in a bathroom and the trim pieces are 12" long the arch is 30" wide with a 3.5" rise.

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Re: Question about an arch

Postby George Davidson » Sat, Apr 11 2009, 12:35PM

I would have to see the tiles your using _sizes
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Tile 4.441 x 2 in_2.jpg
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Re: Question about an arch

Postby Gary Puckett » Sat, Apr 11 2009, 1:13PM

Thanks George for all the help here is the information. The tile is a trim piece it is 11 13/16" long and 2 1/8" tall

How did you figure it out so I will know how to do it?

Thanks
Gary
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Re: Question about an arch

Postby George Davidson » Sat, Apr 11 2009, 1:58PM

Try them in CardBoard first
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Re: Question about an arch

Postby DanEpps » Sat, Apr 11 2009, 2:25PM

This formula will give you the radius of a circle for known chord length and rise:

R= (((A/2)^2) + (B^2)) / 2B

Where R = radius, A = Chord Length and B = Arc Height

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Re: Question about an arch

Postby DanEpps » Sat, Apr 11 2009, 2:36PM

If my calculations are correct, it will take 4.85 of those tiles for that arc. You might want to consider much shorter tiles (like 4") to get a smoother arc.

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Re: Question about an arch

Postby DanEpps » Sat, Apr 11 2009, 2:50PM

Here are a couple of Excel arc calculators.
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Re: Question about an arch

Postby Gary Puckett » Sat, Apr 11 2009, 5:06PM

Thanks Dan and George,

I am creating the arch so I know the rad. the rise , and the cord. What I need to know is how to figure how long the tiles should be to make as smooth an arch as possible. Dan said 4" how did you get to that figure?

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Re: Question about an arch

Postby Gary Puckett » Sat, Apr 11 2009, 5:29PM

Got it, sometimes it takes a while for things to get through this thick skull of mine :wall: . The total lenght of the arch is 32 5/8" divide that by 6 and each piece should be 5 7/16" long now I just have to figure in the grout lines.

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Re: Question about an arch

Postby DanEpps » Sat, Apr 11 2009, 5:36PM

Gary Puckett wrote:Thanks Dan and George,

I am creating the arch so I know the rad. the rise , and the cord. What I need to know is how to figure how long the tiles should be to make as smooth an arch as possible. Dan said 4" how did you get to that figure?

Thanks
Gary


Its just a number I tossed out. The smaller the tile, the smoother the curve will be. You method works great when you know the length of the arc and how many segments you want.

Are you going to angle the ends so they will have a uniform grout line or just have a wedge-shaped grout line?

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Re: Question about an arch

Postby Gary Puckett » Sat, Apr 11 2009, 6:18PM

I guess to do it right I have to figure the angle and cut them.

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Re: Question about an arch

Postby George Davidson » Sat, Apr 11 2009, 7:47PM

Make them on cardBoard
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3 Pices of Tile_2.jpg
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3 Pices of Tile.jpg
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Re: Question about an arch

Postby George Davidson » Sat, Apr 11 2009, 8:00PM

Tile cut
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3 Pices of Tile_3.jpg
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