Kreg Owners' Community

I am going to be building a 8 foot octagon picnic table this winter for a relative. Is there a formula to use to get the octagon started or do I need to scale it out and go from there?

Views: 481

Reply to This

Replies to This Discussion

Yes that is the one I found last night and posted,Thanks anyway

John Schaben said:
This may be a bit off thread but here's a little trick for translating decimal numbers to fractional.
Multiply the decimal number by an arbitrary number you want for the denomonator of the fraction, I usually use 32 as it's easy to reduce. The nearest whole number of the result becomes the numerator of the fraction.
example: decimal 0.163 multiplied by 32 is 5.216. Therefore the fractional equivalent is 5/32.
or 0.181 times 32 is 5.792 or 6/32 which would be 3/16.
Sounds as if you are a math major thanks

Jens Jensen said:
Yes that is the one I found last night and posted,Thanks anyway

John Schaben said:
This may be a bit off thread but here's a little trick for translating decimal numbers to fractional.
Multiply the decimal number by an arbitrary number you want for the denomonator of the fraction, I usually use 32 as it's easy to reduce. The nearest whole number of the result becomes the numerator of the fraction.
example: decimal 0.163 multiplied by 32 is 5.216. Therefore the fractional equivalent is 5/32.
or 0.181 times 32 is 5.792 or 6/32 which would be 3/16.
Not really, just a little tidbit I picked up and have found useful, thought some others might also.



Jens Jensen said:
Sounds as if you are a math major thanks

Jens Jensen said:
Yes that is the one I found last night and posted,Thanks anyway

John Schaben said:
This may be a bit off thread but here's a little trick for translating decimal numbers to fractional.
Multiply the decimal number by an arbitrary number you want for the denomonator of the fraction, I usually use 32 as it's easy to reduce. The nearest whole number of the result becomes the numerator of the fraction.
example: decimal 0.163 multiplied by 32 is 5.216. Therefore the fractional equivalent is 5/32.
or 0.181 times 32 is 5.792 or 6/32 which would be 3/16.
Thank you Mr. John S......the trick for translating decimals to fractions will come in handy....the main reason for my construction caculator was my lack of ability to do this, but with your trick it is much easier.

hi ,

It took years for me to find this formula.I knew there had to be one. I refered back as far as an 1937 old Audels carpentry book. it said to use 13 instead of 12" when laying out for an octogon. I found this formula in a how to magazine.

Use 2.414 and divide the size (You want to use)by it . your case would be

8 foot divided by 2.414=3 '3 3/4"per side this is as close as you need to be for what your doing . If you use a construction master you have to do several steps to check this but its close enough. to the 1/16TH

i used this to find the sizes of and octogon roofs.

Hope it helps

jim In pittsburgh

Go steelers

get well Sidney

Thanks for the sites,  i will use them
Thanks John this is much easier to do

John Schaben said:
Thank you. Mentioned Audels I  have no idea what ever happened to my fathers collection but I sure wish I had them

Jim Siniawski said:

hi ,

It took years for me to find this formula.I knew there had to be one. I refered back as far as an 1937 old Audels carpentry book. it said to use 13 instead of 12" when laying out for an octogon. I found this formula in a how to magazine.

Use 2.414 and divide the size (You want to use)by it . your case would be

8 foot divided by 2.414=3 '3 3/4"per side this is as close as you need to be for what your doing . If you use a construction master you have to do several steps to check this but its close enough. to the 1/16TH

i used this to find the sizes of and octogon roofs.

Hope it helps

jim In pittsburgh

Go steelers

get well Sidney

Reply to Discussion

RSS

Need Help?

For Technical Support, please call 800-447-8638 or send a message. Reps are available Monday through Friday from 8am to 5pm CST. 

Popular Posts & Projects 

1 Parts

Parts

Videos

  • Add Videos
  • View All

Forum

Parts

The Clamp anchor screw broke on my mobile project center.  How can I acquire a replacement?Continue

Started by Jon J Howard in Beginners' Zone yesterday.

Rip-cut ACS plunge saw

Just got a rip-cut and installed my Bosch saw haven't used it yet but saw was a good fit. Got the original ripcut and didn't really like it had trouble cutting straight. New one has several improvements should make it work much better. especially…Continue

Started by William Burt Brown in General Woodworking Mar 17.

Product Reviews

New Kreg 720Pro

I saw the video Kreg put out for this new jig and had high hopes for it.

I purchased one today and am very disappointed with it.

First the docking station is extremely cheap. The plastic is pathetic. A Lego has more…

Continue

Posted by Duke Leon on February 15, 2021 at 9:00pm

Not Pleased With Pocket Hole Construction

Several months ago, I purchased the Kreg K4MS so that I could build the Lego Table as outlined on the companion "buildsomething" web site which exclusively uses pocket hole construction.  I have considerable experience with conventional…

Continue

Posted by Robert Ringel on September 17, 2020 at 1:48pm — 4 Comments

© 2021   Created by KregRep.   Powered by

Badges  |  Report an Issue  |  Privacy Policy  |  Terms of Service

_