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Personally I'd go with ply as the main structural component.
Because it's the back you don't need expensive ply, it solves a lot of design issues, it's simple, and the box frame should be pretty much bomb proof once it's all assembled. A sturdy ply back will give it incredible resistance to wracking, AND cover the back of the cabinet in one easy step.
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I think the original plan will work just fine, and so will using just the 1/2" ply....at least as far as structural strength. I don't have a preference between them, but would likely choose the first option..
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03-22-2018, 07:03 AM
(This post was last modified: 03-22-2018, 07:03 AM by GlenS.
Edit Reason: typo,,,, AGAIN!!
)
I like 1/2" ply for dresser backs. Plus you can drop it down to within an inch or so of the floor to help solidify the legs.
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There's very little structural support provided by the back panel, since it's mounted in a frame. 1/4" ply is plenty adequate, IMO. Ply also solves any movement issues of a large panel. If you went to 1/2", you'd get negligible benefit and it'll make your dresser a whole lot heavier.
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Allan Hill
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03-22-2018, 08:45 AM
(This post was last modified: 03-22-2018, 08:49 AM by tomsteve.)
the dressers ive built( only 5 i think) had 1/4" ply back that was nailed to the perimeter and each drawer divider. the first one was built for myself 13 years ago, has moved to 3 different houses plus moved in the rooms a few times over those years and it is still as solid as they day i constructed it.
if that one is going to be moved on a dolly, i would set the dresser on a piece of plywood then lift with the dolly. i dont think i would want the back to go down past the bottom of the carcass.
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I've always used Narrow Crown Staples to hold in 1/4" plywood backs. A couple dozen pieces over a few decades without issue.
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