Oh, just tell me.

CEFreemanJanuary 3, 2012

I've seen all the calculators and articles about shelf stress and sagging-ness and it just doesn't seem to compute in my head.

I have several 30" oak wall cabinets. The carcasses are oak plywood. They have center mullions, which I want to remove.

What type of wood (or material) should I use for shelves that won't sag? How thick?

That's all I want to figure out.

I'm am afraid I'm over-thinking it, but I learn by trial and error, heavy on the error part. These shelves will be a lot of material and I just don't want to screw it up.

What would you recommend?

Thanks.

Christien

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HandyMac

Make back rests(cleats) on the rear insides of the cases.

Add front supports under the front edges of each shelf.

That will allow the use of almost any 3/4" stock for the shelves and minimize any sag.

    Bookmark   January 3, 2012 at 4:30PM
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sombreuil_mongrel

Hard maple 3/4" thickness is very firm.
Poplar 3/4" thickness Is slightly springier, but still acceptable.
Yellow pine 3/4" thickness is as firm as maple.
White pine (ponderosa from HD)is the springiest, but still within the acceptable range, just a bit weaker than poplar.
I used a 28" span, 30lb load (default) and 3/4" thickness at the Sagulator site.
A 28" span is not very much, and almost any common wood will be fine unless you're shelving hardcover books or bullion ingots.
Casey

Here is a link that might be useful: sagulator

    Bookmark   January 3, 2012 at 7:09PM
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CEFreeman

Thank you, everyone.
That's the information I was hoping to get in just plain English.
Sombreuil_mongrel, that was my last calculator which made me a little crazy.

I can do exactly as advised and have yet another wall of cabinets together. Just gotta worry about doors!

Thank you all for your clear help!
Christine

    Bookmark   January 3, 2012 at 9:39PM
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CEFreeman

Casey, I just reread your last line.

[whisper] Who told you about my ingots?

C.

    Bookmark   January 3, 2012 at 9:40PM
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