Newbie with dado/rabbet question...

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Forum topic by ringore posted 04-19-2011 03:14 AM 2524 views 0 times favorited 5 replies Add to Favorites Watch
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24 posts in 2833 days

04-19-2011 03:14 AM

Topic tags/keywords: design dado rabbet

How deep should dado/rabbets be in a side panel of 3/4” plywood bookshelf? I wasn’t sure if there is a rule of thumb to follow when determining the depth of the cut.

-- "I'm a classic overachieving underachiever" - Phil Newcomb

5 replies so far

View mvflaim's profile


189 posts in 3325 days

#1 posted 04-19-2011 03:18 AM

3/8”. rule of thumb is the depth of the dado is half the thickness of the side.

View rance's profile


4267 posts in 3394 days

#2 posted 04-19-2011 03:28 AM

I always teach 1/3 the thickness. I’d be interested to see what A1Jim does on his. A tie breaker? :)

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--

View JasonWagner's profile


527 posts in 3414 days

#3 posted 04-19-2011 03:42 AM

Yeah, i’ve always done about half the thickness…are these dados to hold the shelves?

-- some day I hope to have enough clamps to need a clamp cart!

View bubinga's profile


861 posts in 2902 days

#4 posted 04-19-2011 04:08 AM

I agree with ,,rance
a quarter inch deep dado (in three-quarter inch stock )will hold the shelves fine, and not weaken the sides
But once it is glued up, it probably doesn’t matter
The two bookshelves I built the dado’s were, one third the thickness of the sides

-- E J ------- Always Keep a Firm Grip on Your Tool

View devann's profile


2246 posts in 2926 days

#5 posted 04-19-2011 04:10 AM

I’m in the 1/3 camp. I use a router with a template bit and jig. Rout back to front, turn off router at end of cut and remove. Do not back out, the joint won’t be has tight. I don’t cut all the way across the sides because I round over the front edge of the bookshelf.

-- Darrell, making more sawdust than I know what to do with

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