All,

I have been troubled trying to figure out how to make the perfect Door Arch Form for my oven door and landing. I have heard that there are charts and calculators to tell you how to draw out the arch based on rise and run...

Anyway, I was hoping to come up with a DIY method for getting the Door Arch Form, just right, using a string, marker, and a piece of plywood. Basically, i would tack a string in the center of the plywood sheet and run a pen along the outer swing creating an arc. I just need to know how long the string should be.

I would like to make my oven opening one firebrick high at 9" with the width of the opening to be 20". Now, I also want an arch with a max height of 11". What is the radius of the circle I would need to draw on the plywood?

After some heavy cyphering and Internet searching ...

I found some equations from basic geometry online and realized that I have grossly forgotten alot of this stuff over the years. After going over the equations a few times, I threw some numbers at it to see how it all panned out.

Everything seemed to work on paper with this method and I was hoping some of you guys could double check the logic here to make sure I'm not losing it

If it checks out, hopefully it will help someone out with their door arch forms down the road.

I'm just trying to get all this calculated before I start...

I have been troubled trying to figure out how to make the perfect Door Arch Form for my oven door and landing. I have heard that there are charts and calculators to tell you how to draw out the arch based on rise and run...

Anyway, I was hoping to come up with a DIY method for getting the Door Arch Form, just right, using a string, marker, and a piece of plywood. Basically, i would tack a string in the center of the plywood sheet and run a pen along the outer swing creating an arc. I just need to know how long the string should be.

I would like to make my oven opening one firebrick high at 9" with the width of the opening to be 20". Now, I also want an arch with a max height of 11". What is the radius of the circle I would need to draw on the plywood?

After some heavy cyphering and Internet searching ...

I found some equations from basic geometry online and realized that I have grossly forgotten alot of this stuff over the years. After going over the equations a few times, I threw some numbers at it to see how it all panned out.

Everything seemed to work on paper with this method and I was hoping some of you guys could double check the logic here to make sure I'm not losing it

If it checks out, hopefully it will help someone out with their door arch forms down the road.

I'm just trying to get all this calculated before I start...

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