Making a chair sit flat

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Forum topic by SuperDave02 posted 09-03-2009 11:47 PM 2001 views 0 times favorited 15 replies Add to Favorites Watch
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141 posts in 3260 days

09-03-2009 11:47 PM

Does anybody have a secret, quick and easy way to square up a 4 leg chair so it sits flat without rocking? I have an idea how to, but would like some othoer options, just in case they are better than what I am thinking of doing.

Thanks David

-- David South FLorida

15 replies so far

View MaxS's profile


46 posts in 3222 days

#1 posted 09-03-2009 11:56 PM

Find a flat surface. (Top of a tablesaw would be good). Put your chair on the surface. Put a piece of course sand paper grit side up between the top and the chair-leg-that’s-to-long and sand it down until all four legs are even. (You might have to do this to more than one leg…but you get the idea).

-- Socrates: "I drank what?"

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141 posts in 3260 days

#2 posted 09-04-2009 12:21 AM

A+ Thanks Max It worked perfectly, Only took a couple of passes along the saw to make them flat as can be.

-- David South FLorida

View miles125's profile


2180 posts in 4034 days

#3 posted 09-04-2009 01:00 AM

But sometimes you need a crooked chair if the floor demands it. Wink

-- "The way to make a small fortune in woodworking- start with a large one"

View Brian's profile


79 posts in 3740 days

#4 posted 09-04-2009 03:42 AM

A much faster way is a tip from a video I saw (but can’t remember where).
You set the tablesaw blade just slightly protruding above the table and you pass the chair-leg-that’s-to-long over the spinning blade. Waaaay faster than


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1880 posts in 3589 days

#5 posted 09-04-2009 04:14 AM

lol Brian. If I did it that way the legs would probably be only six inches long befoe I got it right.!!

-- Joe

View MaxS's profile


46 posts in 3222 days

#6 posted 09-04-2009 05:24 AM

Cool. Glad it worked out. Cheers.

-- Socrates: "I drank what?"

View Rich99's profile


60 posts in 3200 days

#7 posted 10-07-2009 07:06 AM

i’d be sanding for a long time…

-- Far-North Wood-Works (a fantasy company)

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1466 posts in 4116 days

#8 posted 10-07-2009 09:11 AM

Thjat’s fine if you just have to even one leg.
Check out my review of the MultiMaster and the SonicCrafter if you have to shorten all 4 legs.


-- No piece is cut too short. It was meant for a smaller project.

View BTKS's profile


1986 posts in 3493 days

#9 posted 10-07-2009 02:06 PM

What about adjustable feet, just for those times the floor isn’t flat either? Costs more but not much. Just my .02, BTKS

-- "Man's ingenuity has outrun his intelligence" (Joseph Wood Krutch)

View Dean's profile


1 post in 3100 days

#10 posted 05-14-2010 08:10 AM

I realise it’s quite a while since the question was posted however I’ve had this problem previously and used this method successfully. It’s basically similar to the pvc pipe method.
Place the chair on a flat surface. Then place a piece of timber on the flat surface with enough width where it will sit just above the bottom of the short leg. Then mark around each leg with a pencil moving the piece of timber with the pencil. Then cut.

-- Dean, Australia,

View CharlesNeil's profile


2411 posts in 3899 days

#11 posted 05-14-2010 01:33 PM

View Nomad62's profile


726 posts in 2987 days

#12 posted 05-14-2010 07:11 PM

Tip it upside down and beat the buh-jeezus out of it with the biggest hammer you have. It won’t be long before you have no problem with a wobbly leg again. cheers!

-- Power tools put us ahead of the monkeys

View Viktor's profile


466 posts in 3447 days

#13 posted 05-14-2010 11:25 PM

If you don’t have a flat surface (requires 4 to 6 woodworkers OR one normal person to complete).
Turn the chair upside down and tightly stretch two strings over the top of diagonally opposing legs. If the tips of the legs are not in one plane the strings will not touch in the middle. Measure the shortest distance between the strings (where they intersect). Find the longer leg (it will be obvious which one from the strings). Cut a piece twice as long as the distance you just measured.
If this doesn’t work drill a hole in the floor to accommodate the longer leg.

Correction: the suggested length of cut will only be accurate if the strings intersect at the middle (i.e. leg ends form a rectangle). If not, you’ll have to adjust the amount of cut proportionally.

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466 posts in 3447 days

#14 posted 05-15-2010 01:06 AM

Option #2 if you don’t have a flat surface.

Get a wide container, fill it with water, keep it still, freeze the water (slowly!) If you freeze the water rapidly the ice may develop cracks and shifts and be uneven. Now that you have a perfectly flat ice surface do what MaxS said.

OK, OK, your ice surface will not be flat, it will follow the curvature of the Earth, but if you chair is symmetric in one vertical plain (for example leg ends form rectangle or trapeze) the trick will still work.

If you really picky, you could get a truly flat surface by rotating the water container slowly while it freezes. Centrifugal forces will pull the water to the edges, thus compensating for gravity-induced surface curvature. (Calculate needed rotational speed yourself). This is how they make that giant parabola shaped telescope reflecting mirror. (Was it parabola? Could be spherical…)

View SuperDave02's profile


141 posts in 3260 days

#15 posted 05-15-2010 04:04 AM

LMAO ok I want it to be perfect… many RPM’s to rotate while it freezes?

-- David South FLorida

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