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How do I get the arch for the back of an adirondak chair

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Forum topic by yakerjax posted 09-04-2007 09:59 PM 1330 views 0 times favorited 9 replies Add to Favorites Watch
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yakerjax

60 posts in 4157 days


09-04-2007 09:59 PM

I was hoping someone could help me….

Mom and Dad are making an adirondak chair.. Could someone help me figure out how to get the arch on the back of the adirondak chair.. They are trying to get the arch 22 1/2 inches but not sure how to make it straight…

Thank you all for your help

Cheryl


9 replies so far

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Obi

2213 posts in 4434 days


#1 posted 09-04-2007 10:07 PM

Cheryl. they have a thing at Lowe’s which is a compass (circle drawing thingy) with a 1/2” white dowel making it possible to make a 24” circle. put all the back pieces together and then take this compass and draw an arch and then you just seperate the pieces.

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yakerjax

60 posts in 4157 days


#2 posted 09-04-2007 10:13 PM

Is there anything they can use instead as lowes is an hour from them… I told them its probably better to drop the project and go get one and then finish it…
If I am understanding them correctly the pattern is in a book and I understand that its the support part that they need the arch in…
Is it better to drop and run get that or is there anything they can use as a subtitute??

Thank you

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WayneC

13783 posts in 4295 days


#3 posted 09-04-2007 10:13 PM

Adding to what Obi said, you may want to add spaces to represent how they will be spaced when attached to the chair. It depends on what kind of look your going for. Some free plans can be found on the following link.

http://www.calredwood.org/ref/lit.htm

-- We must guard our enthusiasm as we would our life - James Krenov

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GaryK

10262 posts in 4186 days


#4 posted 09-04-2007 10:22 PM

Try a piece of string, a thumbtack and a pencil.
Put the thumbtack at the center point. Tie the string to the length needed for the circle you want
then loop it around the thumbtack. Put the pencil in the loop at the other end and draw your perfect
arch.

Other than that, take a thin piece of wood that you can bent into the arch you want.
Tie both ends together with string to keep it bent while you use it to trace your arch.

-- Gary - Never pass up the opportunity to make a mistake look like you planned it that way - Tyler, TX

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yakerjax

60 posts in 4157 days


#5 posted 09-04-2007 10:31 PM

Excellent.. Sorry for the abrupt question.. They were stuck and called to see if I could fiind something online for them and I could not but I knew you all are awesome and that someone would give me a hand with it… The string idea worked perfect and they will be making a trip to lowes to purchase one of those compass’...

Thank you all once again for the help

Cheryl

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Thos. Angle

4444 posts in 4160 days


#6 posted 09-05-2007 02:46 AM

You can also make a wheel wright’s compass from a slat with a hole in one end for a nail and in the other for a pencil. Tack the nail on the center point and drilll the hole for the pencil where you want the arch. Been used to make felloes for wheels for ever. Make spacers for the fan of the back and clamp them together before you darw the arch.

-- Thos. Angle, Jordan Valley, Oregon

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yakerjax

60 posts in 4157 days


#7 posted 09-05-2007 04:36 AM

Argh,,, I thought I had it but I misunderstood them.. I thought they were trying to get the fan back done but instead they are working on the back supports… If anyone happens to have the book called The Complete book of woodworking… its page 407 Letters D and E… or page 411 Letter H
There are two diagrams one is (D) 22 3/4 radius and the other is (E) 18 1/4 radius however its all one board… How do you figure this part…
On the 7 board fan back it is the top and bottom support boards across the back. Not sure if there is a tool or what you use to get the exact measurment..

Thank you again for helping me understand all this new stuff..

Cheryl

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Thos. Angle

4444 posts in 4160 days


#8 posted 09-05-2007 04:49 AM

Cheryl, use the compass I described. Drill a nail hole in one end and then two holes for the pencil, one at 22 3/4 and the other at 18.14 (from the nail hole). Take a piece of plywood or particle board that is big enough to attache this and put a 2×4 across the bottom. Place the board you need to scribe the circle on above the 2×4 and adjust the slat compass so it is in the correct spot on the board. put the pencil in the proper hole and mark the arc. Then move the nail down and mark the second arc on the second board. You will need to set the 2×4 with a square so there is a 90 degree center line to use to place the nail for the pivot point. I’ll stay here if you don’t under stand.

-- Thos. Angle, Jordan Valley, Oregon

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Obi

2213 posts in 4434 days


#9 posted 09-07-2007 01:35 AM

I cheated. I bought one for $29.95 and then used it as a template. The back supports were off and they had different angles on them, so I made a template. You can see the template here The center piece is 2” x 3 1/2” the two on each side is 3 1/2×2” on the narrow side and 2 1/2 ” on the wide side and the two outside pieces are 3 1/2” x 2 1/2” on the narrow side and 3” on the wide side and then there is a 1 1/2” x 3” at the very ends. good luck

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