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Plywood Strength Parallel with Plies

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Forum topic by Biologyben posted 02-20-2017 03:33 PM 300 views 0 times favorited 4 replies Add to Favorites Watch
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Biologyben

1 post in 300 days


02-20-2017 03:33 PM

Topic tags/keywords: plywood strength

I have a 3 commercial desktops and would like to make a c-leg style bases for workstations. If I use plywood, I’m thinking about a design like this.

NOTE: I’d radius the inside corners as well to provide a bit of gusseting. Where the front skirt and top attachment pieces join to the plywood, I would drill holes to screw into dowels.

My concern is if the plywood would have the strength to support someone sitting on the open edge of the desk. None of the strength tables showed plywood being used in this capacity – they were all for typical sheathing applications with strength perpendicular to the plies.

Thoughts?


4 replies so far

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hotbyte

989 posts in 2814 days


#1 posted 02-20-2017 03:47 PM

Never used plywood in that manner but my first thought is that it would not hold up to forces along length of desk with legs that are 3/4”, i.e. someone leaning against end. Perhaps you could add a piece along back of legs to form an L???

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rwe2156

2716 posts in 1319 days


#2 posted 02-20-2017 04:00 PM

If you laminate 3 layers of ply together and alternate plys I think it will be ok.
I would also make the top support wider.

-- Everything is a prototype thats why its one of a kind!!

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MrRon

4496 posts in 3082 days


#3 posted 02-20-2017 06:49 PM

How about something like this?

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jerryminer

811 posts in 1280 days


#4 posted 02-20-2017 06:58 PM

I think your design would probably work. For a definitive answer, there is no substitute for a prototype!

(you could scale it down 2/3 and prototype with 1/4 ply and load-test at little cost)

Let us know what you learn.

-- Jerry, making sawdust professionally since 1976

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