Big box stores meteric sized materials - Router Forums
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post #1 of 56 (permalink) Old 07-16-2019, 09:41 AM Thread Starter
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Default Big box stores meteric sized materials

What are your standard size materials ? Examples 1X4 x 8 first 2 numbers are inches last is feet. Lengths 8,12,14 and 16 feet Widths increase by 2 inch,

up to 12. Thickness is 3/4 inch widths for planning vary from 1/2 to 3/4 inches. Then you have the 2x stock.
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post #2 of 56 (permalink) Old 07-16-2019, 10:56 AM
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Gary; what were the metric sizes you were referring to?
Up here, N. of 49, the plywood is marked as metric but is in fact the traditional Imperial sizing...
http://cwc.ca/wp-content/uploads/201...wood-Sizes.pdf
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post #3 of 56 (permalink) Old 07-16-2019, 12:06 PM
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Standard size of materials, eh? Any size I can get, then I plane it to the size I want, or glue it up. Or use it on a different project.
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post #4 of 56 (permalink) Old 07-16-2019, 01:25 PM
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Imperial measure still calls board sizes as 2 x 4, 6, 8, etc which is the rough sawn dimension as it would have been years ago on early mills. Our code is now in metric according to Canadian law and the actual size is listed in metric, such as 38mm x 89mm for a 2 x 4. I`ve seen sheets of things like melamine listed as 1220 by 2440mm instead of 4 by 8 so it`s probably a matter of time before the Imperial size stops being referred to. The US exports in things like sheet goods is already metric because they have to do that if they want to sell in world markets.
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post #5 of 56 (permalink) Old 07-17-2019, 07:22 AM
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So tell me again why is metric better than imperial? They were able to land a man on the moon using imperial so to me that means it's good enough for the everyday Joe. Just like a rose by any other name is still a rose, an inch by any other name is still an inch. I can't imagine telling someone to go cut me a 2x4 4 feet 2 and a half inches long.
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post #6 of 56 (permalink) Old 07-17-2019, 08:45 AM
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Quote:
Originally Posted by mgmine View Post
So tell me again why is metric better than imperial? They were able to land a man on the moon using imperial so to me that means it's good enough for the everyday Joe. Just like a rose by any other name is still a rose, an inch by any other name is still an inch. I can't imagine telling someone to go cut me a 2x4 4 feet 2 and a half inches long.
Actually not quite right. All of the Apollo Program blueprints had both Imperial and Metric dimensions on them. However, most of the pieces were made to common imperial dimensions. It was transition time and some vendors were working in Metric and some (most) were working in Imperial. Fortunately for me, the electrical work required very little of either dimensional measurements. Volts, Amps, and Ohms remained the same.

BTDT

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post #7 of 56 (permalink) Old 07-17-2019, 09:08 AM
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Quote:
Originally Posted by roofner View Post
What are your standard size materials ? Examples 1X4 x 8 first 2 numbers are inches last is feet. Lengths 8,12,14 and 16 feet Widths increase by 2 inch,

up to 12. Thickness is 3/4 inch widths for planning vary from 1/2 to 3/4 inches. Then you have the 2x stock.
Gary, 1"x 4" x 8' = 25 x 100 x 2400 mm*

1/2"=12.5mm, 3/4"=19mm, 1"=25mm and 2"=50mm

*2400mm=2.4meters

I hope this helps.
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post #8 of 56 (permalink) Old 07-17-2019, 09:42 AM
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I spent 60 years working in imperial measurements.
I moved to a metric country, and after 10 years here have almost completely converted, even in my mind.
I now have 4 metric tape measures and only 1 very old one showing imperial
I can now guesstimate metric sizes up to a foot much easier than before.
But I'm 6ft 2" and I dont think I will ever consider myself to be 1.879 metres.

however, working with metric measures is amazingly simple compared to numbers like 3/64ths and I am happy to stay metric.
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post #9 of 56 (permalink) Old 07-17-2019, 10:36 AM
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Originally Posted by mgmine View Post
So tell me again why is metric better than imperial? They were able to land a man on the moon using imperial so to me that means it's good enough for the everyday Joe. Just like a rose by any other name is still a rose, an inch by any other name is still an inch. I can't imagine telling someone to go cut me a 2x4 4 feet 2 and a half inches long.
Not true. NASA switched to metric way, way back. They found it was less prone to make math errors since everything is a multiple of 10. There was an official date when they announced it but insiders said that it was actually years earlier. When I studied physics at the University of Alabama between 68 and 71 everything was taught in metric. The engineering students were still using Imperial units I was told.

By the way, the inch was set to 25.4mm in length officially somewhere around 1939. When Britain went to war with Germany the US helped by making parts for .303 rifles but there was just enough differences between their inch and the US inch that if the parts were at maximum out of tolerance limits in opposite directions the parts wouldn`t work. So they got together and decided to standardize the lengths at 25.4mm. You`ve been working with a metric inch all your life Art.

And that highlights another issue with Imperial measure, namely there isn`t just one of them. For example, the British and Canadian gallons were 20% larger than the US one with 160 ounces vs. 128 (4.55 L vs. 3.79 L). Both were 4 pints but 40 vs. 32 ounces each.

Metric is the same everywhere in the universe since it`s based on a few physical constants such as the length of a specific wavelength of light and the mass of a liter of water which is also equal to 1000 cubic centimeters in volume. The US standards are kept in an underground vault in Washington and they`ve had to convert to metric equivalents anyway as they found out that those standards have been losing mass over the decades so aren`t reliable anymore.

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post #10 of 56 (permalink) Old 07-17-2019, 11:04 AM
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In my shop, neither are used. If it fits, nail it. Well, that might be a slight bit of over simplification. However, I do try to avoid any measuring device with numbers. But then, I don't build space craft or even pianos.
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