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Can I flatten my new worktop?

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Forum topic by Hugh Anderson posted 07-19-2011 12:45 AM 1384 views 0 times favorited 4 replies Add to Favorites Watch
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Hugh Anderson

49 posts in 2157 days


07-19-2011 12:45 AM

Hi all,

so, I made a 27” x 50” work surface to sit to the right of my table saw – the materials were 3/4 ply and 3/4 MDF screwed and glued, and top and bottom surfaces laminated. I had some nice Rosewood left over from my floor, and that made the edging. (about 1 inch thick)

Upon installation I find that the surface is not flat, it’s high in the middle and falls off at the edges. How did I miss this!!??

I was wondering if I could bolt angle iron or similar to the underside to flatten it, or am I going to have to start again?

Thanks!

Hugh


4 replies so far

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Grandpa

3256 posts in 2141 days


#1 posted 07-19-2011 01:12 AM

WOW, the answer to this is maybe. You might even be able to use a couple of 2×6’s to do this if it can be done. The 2×6’s could be straightened on a jointer before using them. Are you sure the work surface is cupped on the bottom. It would have to be cupped if the top rises and you plan to straighten it. If it is cupped there is a chance. If it is not then I would start over. If it is cupped you could use lag screws and pull the top to the straightened 2×6. You would probably need cauls on the top. Straighten them also. Check everything with a string to make sure it is like you want it. Glue the 2×6 to the bottom if you try this. Glue and screws. This will be intersting to find out if anything works. The bad thing with angle iron is it might not be straight and most of us can’t straighten it. We are left to working with something we have the tools to work with. Wood.

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Hugh Anderson

49 posts in 2157 days


#2 posted 07-19-2011 02:19 PM

Looking at the edge that meets the table saw, I have had to set it about 1/8 of an inch low, because the surface then rises at it heads away from the saw.

Anything more than three feet wide meets the high point and the lumber is effectively laying flat, and anything less than that will likely be held flat to the cast iron section – so this might not be an issue. But it’s not flat, I know it’s not flat, and it’s bugging the hell out of me. :)

I will be fitting a router plate into the higher area, so I am also living in the hope that things will level out a little because of that – but the DeWalt 618 is not that hefty.

cr1 – can you tell me more about how you would deform it into shape? And what did you mean by using wood laminate?

Thank you guys for your replies!!!

Hugh

EDIT.

Here is a quick iPhone photo to show the setup.

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Pdub

915 posts in 2646 days


#3 posted 07-19-2011 05:19 PM

I had the same problem when I made my work bench top. I used MDF thinking it would be flat. WRONG
It cupped on me like yours did. I ran boards across it and clamped it till it was flat. Then used lag bolts through the top and attached it to the base with some additional boards running from side to side to keep it flat. Seems to be working so far. Good luck!

-- Paul, North Dakota, USAF Ret.

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Hugh Anderson

49 posts in 2157 days


#4 posted 07-19-2011 06:44 PM

Thank you Paul. I appreciate the advice.

Hugh

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