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How do you make angled box sides?

Blog entry by Blake posted 297 days ago 864 reads 5 times favorited 9 comments Add to Favorites Watch

It may sound simple, but I’m pretty sure there’s more to it than it looks like.

I am making a open-top box, bin, basket, what-have-you to toss throw pillows in at the foot of the bed. The four sides will be slightly angled or flared-out instead of straight up and down.

If you cut each side as a trapezoid, the miters are not still 45 deg. are they? Isn’t there some calculation to figure out the angle?

I have always wondered this. Thanks!

-- Check out my new website! http://www.blakeweberwoodworking.com


9 comments so far

View mrtrim's profile

mrtrim

1698 posts in 777 days


posted 297 days ago

since you need a compound mitre . yes the corners will still at 45 but you will now need to calculate how much flair you want it to have to get the other angle .since your top and bottom are flat they will need another calculation , again depending on how much flair you want

View FlWoodRat's profile

FlWoodRat

584 posts in 806 days


posted 297 days ago

Blake,
Here is a link that will do the calculation for you. http://www.scarletta.net/WoodJoy/compound_miter.html
Here is a link to a project I did using it. http://lumberjocks.com/projects/8409 It helps a lot if the material you are using is flat. LOL, mine wasn’t and the edges did not fit exactly.

keep in mind, you will have to bevel the top and bottom edges at the same angle as the slope of the sides.

The boxes I built were 18” square at the top and somewhere around 12” square at the bases.

-- I love the smell of sawdust in the morning....

View FlWoodRat's profile

FlWoodRat

584 posts in 806 days


posted 297 days ago

Good luck. By the way, you may want to make something similar to a cross cut sled with the back brace angled at the slope of your sides to hold your work as you slide it over you Table saw.

I have additional links saved on my home computer that I will send you this evening after I get home from work.

Have a safe and productive day.

-- I love the smell of sawdust in the morning....

View Peter O's profile

Peter O

1024 posts in 771 days


posted 297 days ago

I had to do this with my lampshades …
Click for details

The calculator linked above will work great, and there are other similar calculators out there, too.

-- http://www.north40custom.com -- http://north40studios.etsy.com --

View Blake's profile

Blake

2760 posts in 771 days


posted 297 days ago

Thanks!

-- Check out my new website! http://www.blakeweberwoodworking.com

View Beginningwoodworker's profile

Beginningwoodworker

4204 posts in 570 days


posted 297 days ago

You bevel 45’s on all four sides.

-- CJIII Future cabinetmaker

View FlWoodRat's profile

FlWoodRat

584 posts in 806 days


posted 297 days ago

Blake, here are a couple more links for you. Good luck.

http://www.woodworkersguildofga.org/ShopHelpers/MiterCalculator.htm

http://www.woodcraftplans.com/compound_miter.htm

-- I love the smell of sawdust in the morning....

View Blake's profile

Blake

2760 posts in 771 days


posted 296 days ago

Thanks those are some great links!

-- Check out my new website! http://www.blakeweberwoodworking.com

View Mark Shymanski's profile

Mark Shymanski

1555 posts in 609 days


posted 266 days ago

Interesting links!

-- ...it's rennovation time!!!

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