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- #311


Last time I built a pallet wood raised bed, I used 2X4's from the pallets but they were not the same thickness. One 2X4 was the standard 1-1/2 inch thick, but the other pallet "2X4" was only 1-1/4 inch thick. As we all know, pallets are not made with the same wood and you sometimes end up using mismatched thickness boards. That happened to me on my last pallet raised bed build and I ended up having to take them apart and redoing all that work to get my front face flush.
The problem I encountered connecting these boards with pocket hole screws is that the screws are driven into the boards at an angle. If the boards are different thicknesses, then the screws can lift one of the boards resulting in the front face of the boards uneven. You don't normally want this with pocket hole fastening, as in most cases you need the front face to be even. But, you don't care if the back face which you don't see is uneven.
Enter this jig to solve the problem...
Basically, I just used some scrap wood to make the jig. I had a piece of shelving board that was about 20X16 inches. I attached a couple of the 1-1/4 inch thick boards to the edges, making sure they were square at 90 degrees. Then, I screwed in the 2 horizontal clamps you see. I think you can see the 2 boards that I am going to clamp down in the jig are not the same thickness.
Here is a closer look at those boards with different thicknesses...
Anyways, put those boards in place in the jig and clamp them down....
The clamps will now hold the boards flush on the bottom face, which will be the front face of your connected boards. In this pic, I just used some random pieces of wood to show the proof of concept. I don't have the pocket holes drilled into the boards yet. I may have to reposition one or the other clamps not to interfere with the drill and drill bit used to drive the pocket hole screws themselves. Not a big deal as the clamps are just secured with 4 screws into the wood.
Normally, I use my pocket hole clamp which works great with boards of the same thickness. It does not work so good with wood of different thicknesses. This jig I just made will allow me to fasten my pallet boards of any thickness and still get one face that is flush. Plus, it's a lot faster using this jig than my pocket hole clamp because the form is already at a perfect 90 degrees.
The cost of the jig, using scrap wood I had laying around, was less than $10 for the price of the 2 horizontal clamps which I bought at Harbor Freight. Normal price for the clamps was $4.99 each, but I had a 20% and 25% off coupons which I used.
A simple jig like this now allows me quickly, and easily, use my pallet wood of "almost" the same thickness and still end up with professional looking flush faces.

Hope you found this tip useful.