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Dadoed Shelving

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Forum topic by wookie posted 11-17-2013 04:35 PM 734 views 0 times favorited 10 replies Add to Favorites Watch
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wookie

154 posts in 1828 days


11-17-2013 04:35 PM

Topic tags/keywords: built in bookcase question joining

Hey Guys and Gals,

Need some opinions\suggestions for a built in bookcase project. i want to dado in the shelving using 3\4” plywood. My question is, the span of the shelves are 36’. There will be some weight put on these shelves, books. Will these shelves be strong considering the span? Going to rabbit in the back using either 1\4” or maybe 1/2” plywood then screwing the back into the shelves for extra strength. Think that will be enough?

Thanks,

Jack

-- Wookie=Wood Rookie


10 replies so far

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DeltaDaddy

52 posts in 398 days


#1 posted 11-17-2013 04:42 PM

that is a large span and the shelf will most definitely sag. running a dado in the back will help strengthen it. Is this going to be a frameless cab?

-- Take it apart to see how it works

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wookie

154 posts in 1828 days


#2 posted 11-17-2013 04:52 PM

It is going to be 3 separate units screwed together with a face frame.

-- Wookie=Wood Rookie

View Bogeyguy's profile

Bogeyguy

494 posts in 813 days


#3 posted 11-17-2013 04:57 PM

Just place a 1-1/2” X 3/4” solid edge on the front of the shelves for strength in the span.

-- Art, Pittsburgh.

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DeltaDaddy

52 posts in 398 days


#4 posted 11-17-2013 05:03 PM

^ what bogey guy said^ If they are adjustable shelves and if they are all fixed shelves the face frame will strengthen the shelf in the same manner

-- Take it apart to see how it works

View GOOD LUCK TO ALL's profile

GOOD LUCK TO ALL

418 posts in 472 days


#5 posted 11-17-2013 05:23 PM

I think if your screwing the back into the shelf it would be strong enough, but a trim pc on the front edge would definitely help. I would put about an 1 1/4 pc on the front.
I also try to limit the span to 32” so that I can get 3 cuts out of a sheet of material, (unless whatever your building can utilize the other pcs)

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Rick M.

4477 posts in 1125 days


#6 posted 11-17-2013 05:47 PM

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AandCstyle

1474 posts in 1002 days


#7 posted 11-18-2013 01:32 AM

+1 to Rick’s suggestion.

-- Art

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wookie

154 posts in 1828 days


#8 posted 11-19-2013 06:37 AM

Thanks a bunch guys. I did have fun with the sagulator! (I also have been known to watch someone paint a wall online too.) The solid piece on the fronts is the way we will probably go. Also still considering dadoing the backs too. You guys are great!

Cheers,

Jack

-- Wookie=Wood Rookie

View Tony1212's profile

Tony1212

36 posts in 479 days


#9 posted 11-19-2013 07:20 PM

If you take a look at my Kitchen Table and Built-in project, I did a very similar type of built-in. I actually built 4 cabinets, 3 side by side and one on top, and the far left cabinet is about 46 inches wide by 15 inches deep. I screwed them together with a face frame to hide the end grain of the Baltic birch plywood.

The shelves are made of 3/4” plywood with 3/4” x 1.5” hard maple fronts. The maple was was put on the ply so that the 1.5” was visible from the front – flush on top and a lip on the bottom of the shelf. I used pocket screws and glue to attach the maple to the plywood.

There is one fixed shelf in that cabinet. I only dadoed the sides then used glue and screws on the sides and back. All the other shelves are adjustable, so no other dadoes.

My wife has had a good time loading those suckers up. Maybe 50 to 60 pounds fairly evenly distributed. So far (about 4 months), no sag.

for consistency sake, I kept the look of the shelves the same for the other cabinets even though it was overkill for the 11 inch wide cabinet.

-- Tony, SW Chicago Suburbs

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wookie

154 posts in 1828 days


#10 posted 11-20-2013 07:02 AM

Thanks Tony. Your project turned out great. I am also in IL, the Peoria area. Not far from Washington that was hit by the F-4 tornado.

-- Wookie=Wood Rookie

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