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post #1 of 9 Old 10-13-2013, 05:22 PM Thread Starter
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A n00b's question.

I want to make a bookshelf, and permanently attach the top and bottom shelf (duh?)


How can I do this, without putting holes in the outside of the bookshelf? (to nail/screw them into place)

They will be holding too much weight for glue. If it matters, those two shelves will be torsion boxes.


Thanks.
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post #2 of 9 Old 10-13-2013, 05:23 PM
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Rabbets, Dadoes, box joints, dovetails, mortise and tenon...

That bowl was perfect right up until that last cut...
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post #3 of 9 Old 10-13-2013, 05:26 PM Thread Starter
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Quote:
Originally Posted by sawdustfactory View Post
Rabbets, Dadoes, box joints, dovetails, mortise and tenon...

I was afraid that would be the only solution.

Thanks, Sawdust.
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post #4 of 9 Old 10-13-2013, 05:32 PM Thread Starter
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Quote:
Originally Posted by sawdustfactory View Post
Rabbets, Dadoes, box joints, dovetails, mortise and tenon...

Is it a bad idea to do a 2-3" tall dadoe into a 3/4" plywood board? (for my torsion box.)

If not, how deeply into the 3/4" should I go?
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post #5 of 9 Old 10-13-2013, 05:37 PM
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It would be better to post a drawing of some sort or an image off the internet with what you have in mind. List the dimensions.






.
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post #6 of 9 Old 10-13-2013, 05:52 PM Thread Starter
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Quote:
Originally Posted by cabinetman View Post
It would be better to post a drawing of some sort

http://i.imgur.com/yOIQOhI.jpg

Sides are 3/4" W, 6' H, 2' D

Top is 4' W, 2" H, 2' D.



I want the top (not the bottom which I mentioned earlier, that was silly.) to be a torsion box. It will be around 2" tall (thick).
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post #7 of 9 Old 10-13-2013, 06:43 PM
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any reason you want the top to be a torsion box? that could also go together with pocket hole screws:

http://www.kregtool.com/pocket-hole-jigs-prodlist.html

fast, easy and strong. just use plugs top fill the pocket holes.

there's a solution to every problem.....you just have to be willing to find it.
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post #8 of 9 Old 10-13-2013, 07:33 PM
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The width is a bit wide for not having further support in the middle. You wouldn't need a torsion box if you make a center divider. For dadoes, they only need to be " deep. I wouldn't use pocket screws.






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post #9 of 9 Old 10-13-2013, 10:43 PM Thread Starter
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Quote:
Originally Posted by cabinetman View Post
The width is a bit wide for not having further support in the middle. You wouldn't need a torsion box if you make a center divider. For dadoes, they only need to be " deep. I wouldn't use pocket screws.





I didn't draw the entire thing, I only drew the parts we were talking about. I suppose I should have:



I will have multiple shelves, about 5. The middle shelves will all be torsion boxes, placed on metal "L" pieces.

The back will be covered with 3/16" hardboard.



Is it still too wide?

And to the one who asked about why I'm using torsion boxes: to prevent the boards from sagging. If you have a better suggestion, please share.
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