Cross legs for picnic table

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Forum topic by dfox52 posted 08-08-2017 03:18 PM 354 views 0 times favorited 5 replies Add to Favorites Watch
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27 posts in 1627 days

08-08-2017 03:18 PM

What is the best way to layout the diagonal half lap cuts for “X” shaped picnic table legs? I’ve cut my pieces to length using a rectangular template but am having dificulty accurately laying out the diagonal lap joint cuts. I’ve tried clamping the two pieces together and adjusting but that is awkward and seems like there should be a more accurate method. Any suggestions? I don’t mind doing some math if that is what it takes… :)


5 replies so far

View Woodknack's profile (online now)


11311 posts in 2313 days

#1 posted 08-08-2017 04:38 PM

The math is more complicated than expected but I think someone posted it the last time this was asked. Far quicker to either draw it full size or clamp and mark the pieces.

-- Rick M,

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4636 posts in 2285 days

#2 posted 08-08-2017 04:54 PM

Make a full size drawing then use that to set your bevel gauge.

-- Bondo Gaposis

View hotbyte's profile


991 posts in 2909 days

#3 posted 08-08-2017 05:01 PM

Lay them on flat ground or driveway and support the top piece of X with scraps under the end so it doesn’t wobble like a weeble and fall down. Align/measure everything and mark.

View dfox52's profile


27 posts in 1627 days

#4 posted 08-08-2017 06:04 PM

Maybe I’m just too picky but it seems almost impossible to get both “Xs” precisely the same. A tiny variance in the lap joint magnifies into a 1/4 to 1/2 inch difference in the height of the X. I was just wondering if there might be a jig that would ensure all four pieces are identical.

View gargey's profile


938 posts in 709 days

#5 posted 08-08-2017 06:35 PM


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