Author Topic: Question about metric size plywood.....  (Read 3988 times)

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Offline BigCountry73

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Question about metric size plywood.....
« on: March 01, 2015, 10:57 AM »
This might be a stupid question, but I will ask anyway.......

When purchasing metric size plywood are the dimensions true? For example does 19mm thick plywood actually measure 19mm? Or does it vary like the imperial measurements?

Thanks,

Keith

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Offline Peter Halle

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Re: Question about metric size plywood.....
« Reply #1 on: March 01, 2015, 11:50 AM »
Keith, I believe that the measurements are true.  If you have been buying imperial plywood like most of us in the US you have actually been buying metric thickness plywood with imperial panel sizes.  Take a metric tape measure off the wall at one of the big box stores and check it out.

Peter
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Offline BigCountry73

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Re: Question about metric size plywood.....
« Reply #2 on: March 01, 2015, 03:31 PM »
Thanks for the reply Peter! That is what actually primed my interest. I want to start building cabinets for my garage and use the metric system because of its simplicity. When I measured my 3/4" plywood with a digital caliper it measured just shy of 19mm.

I guess I am good to proceed.

Thanks,

Keith

Re: Question about metric size plywood.....
« Reply #3 on: May 20, 2015, 04:18 PM »
Yes, in my experience most of the properly stored metric sized plywood sheets are true in size.
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Offline Mr Heavy

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Re: Question about metric size plywood.....
« Reply #4 on: May 20, 2015, 06:59 PM »
... except in the U.K.

running a caliper on 9mm gives me 8.5
 ?? = 9.5
12 = 10.5
15 = 15
18 = 18
 6  = <5.5
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Offline mike_aa

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Re: Question about metric size plywood.....
« Reply #5 on: May 20, 2015, 08:38 PM »
Keith, I believe that the measurements are true.  If you have been buying imperial plywood like most of us in the US you have actually been buying metric thickness plywood with imperial panel sizes.  Take a metric tape measure off the wall at one of the big box stores and check it out.

Peter
That is if you can find a metric one!  YMMV, but I asked for one in the local orange box store and the clerk who thought they had one tape in metric, searched for a while and discovered they no longer carry them.

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Offline carlb40

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Re: Question about metric size plywood.....
« Reply #6 on: May 21, 2015, 08:22 AM »
... except in the U.K.

running a caliper on 9mm gives me 8.5
 ?? = 9.5
12 = 10.5
15 = 15
18 = 18
 6  = <5.5


Yeah there doesnt seem to be a decent set standard for ply in the uk from what i have seen over the last few years.

Far too many variances in thickness lately. Even when we have had full pallets of 18mm ply, sheets vary by up to 1mm or more in thickness.
Carl

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Offline Trickie

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Question about metric size plywood.....
« Reply #7 on: May 21, 2015, 05:35 PM »
I built Tim's MFTC from 12mm ply from Wickes which actually was 11mm. Didn't realise until the push release drawers weren't catching right. Only then did I think to check. Nothing a wee packer didn't sort but slightly irritating. The 18mm also comes in at 17mm. Always worth checking.
« Last Edit: May 21, 2015, 05:44 PM by Trickie »