| [GMCnet] GMC Plywood floor thickness. [message #289555] |
Tue, 27 October 2015 19:42  |
glwgmc
Messages: 1014
Registered: June 2004
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Actually it is all metric now. 18mm (0.71) is a bit less than 3/4” and 20mm (0.78) is a bit more. No intent to fool anyone, just to standardize sizes around the world. In the US they just round up to 32nds or even 64ths to get inches. In tools these days most all are built to a metric standard and then marked in inches for the US market. Lead screws are changed to produce inch movements but that is about all. All we need to do is follow the rest of the world and ditch this screwy inch business….. It is sooooo very much easier and far less error prone to work in metric.
Jerry
Jerry Work
The Dovetail Joint
Fine furniture designed and hand crafted in the 1907 former Masonic Temple building in historic Kerby, OR
glwork@mac.com
http://jerrywork.com
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Message: 8
Date: Tue, 27 Oct 2015 14:38:37 -0600
From: RC Jordan
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] GMC Plywood floor thickness.
Message-ID:
Content-Type: text/plain; charset="utf-8"
Keep in mind that modern plywood has been converted to 'nominal' sizing --which translates to "they've shaved a couple of mm off of it but still call
it 3/4." In the building trades, a sheet off tar paper is required to level a butt joint between old and new.
--
77 Royale Coachmen Side Dry Bath
76 Birchaven Coachmen Side Wet Bath
Elizabeth City, NC
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Jerry & Sharon Work
78 Royale
Kerby, OR
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| Re: [GMCnet] GMC Plywood floor thickness. [message #289558 is a reply to message #289555] |
Tue, 27 October 2015 20:02  |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Jerry,
Here in Australia we can get plywood that is 7, 9, 12, 15, 17, 18, 19, 21, 25, and 35 mm thick.
The "standard" sheet size is 1200 mm (47.24395 in) x 2400 mm (94.4879 in).
I was wondering if the sheet size changed to metric in the USA or is it still 48 in. x 96 in.?
I agree with you that the metric system is much more logical; HOWEVER, I has taken me quite a while to be able to relate to metric
measurements.
What I mean is when someone says that board is 1/2" thick I know instantly how thick it is. If they say it's 12 mm thick I have to
think about it and relate it to inches.
Regards,
Rob M.
The Pedantic Mechanic
-----Original Message-----
From: Gerald Work
Actually it is all metric now. 18mm (0.71) is a bit less than 3/4" and 20mm (0.78) is a bit more. No intent to fool anyone, just
to standardize sizes around the world. In the US they just round up to 32nds or even 64ths to get inches. In tools these days most
all are built to a metric standard and then marked in inches for the US market. Lead screws are changed to produce inch movements
but that is about all. All we need to do is follow the rest of the world and ditch this screwy inch business... It is sooooo very
much easier and far less error prone to work in metric.
Jerry
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] GMC Plywood floor thickness. [message #289561 is a reply to message #289555] |
Tue, 27 October 2015 20:25 |
rcjordan
Messages: 1913
Registered: October 2012
Location: Elizabeth City, North Car...
Karma: 1
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Senior Member |
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> still 48 in. x 96 in.?
Yes.
We switched to nominal sizes in framing lumber long before mm arrived in the US. 2x4s around here at the turn of the 20th century were ...2x4. Now, 1.5 x 3.5.
SOLD 77 Royale Coachmen Side Dry Bath
76 Birchaven Coachmen Side Wet Bath
76 Eleganza
Elizabeth City, NC
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| Re: [GMCnet] GMC Plywood floor thickness. [message #289577 is a reply to message #289570] |
Wed, 28 October 2015 07:55 |
Kingsley Coach
Messages: 2691
Registered: March 2009
Location: Nova Scotia Canada
Karma: -34
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Just FYI
The Liberal federal government of Pierre Trudeau first began implementing
metrication in Canada in *1970* .
On Oct. 19, 2015, his son, Justin, was elected as Prime Minister here in
Canada....
Metric certainly has confused me....I have to "translate" between the two.
The latest generation gives mileage in terms of, " Oh, It's pretty good, I
get almost 500 kilometers to a tank!" When asked how big the tank is, the
usual answer is " I dunno...but I get almost 500 k's out of one! "
Duh...I give up !!
Mike in NS
On Tue, Oct 27, 2015 at 11:53 PM, Robert Mueller
wrote:
> RC,
>
> Here in Australia a "two by four" is called a "four be two" not a "100 be
> 50" and they don't measure 100mm x 50mm either!
>
> Regards,
> Rob M.
> The Pedantic Mechanic
>
> -----Original Message-----
> From: RC Jordan
>
>> still 48 in. x 96 in.?
>
> Yes.
>
> We switched to nominal sizes in framing lumber long before mm arrived in
> the US. 2x4s around here at the turn of the 20th century
> were ...2x4. Now, 1.5 x 3.5.
>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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>
--
Michael Beaton
1977 Kingsley 26-11
1977 Eleganza II 26-3
Antigonish, NS
Life is too short to hold a grudge; slash some tires and call it even !
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| Re: [GMCnet] GMC Plywood floor thickness. [message #289599 is a reply to message #289555] |
Wed, 28 October 2015 15:10 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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About twenty years ago, we lived in a hundred year old house. I was forever buying big pieces and milling them to fit.
I remember when a 2x4 was 1-3/4x3-3/4. That was at least believable.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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