LumberJocks

Need help from metric woodworkers

  • Advertise with us

« back to Wood & Lumber forum

Forum topic by Dave Rutan posted 08-26-2016 09:37 PM 420 views 0 times favorited 7 replies Add to Favorites Watch
View Dave Rutan's profile

Dave Rutan

1430 posts in 1648 days


08-26-2016 09:37 PM

Topic tags/keywords: lumber size metric wood board dimension centimeter centimetre milimeter milimetre mm cm question

I have a question about wood dimension in metric countries (countries in which the metric system is the standard).

Am I correct that lumber is sold in even number centimeters, I.E. 2cm, 4,cm, 6,cm?

What are the typical lengths of boards, 2 meters? 3 meters? (I realize that (apparently) real lumber yards will sell lumber by the cubic meter, right?

On woodworking drawings, are the dimensions typically expressed in millimeters or centimeters. (My research so far suggests that on architectural drawings they are expressed only in millimeters.)

Are the boards you buy actually the dimensions that they are labeled, or are they smaller because they are planed, like in the U.S.?

Thank for useful replies.

I used to have a link to a chart of standard lumber sizes from a German lumber company, but it was on a computer that has since died.

Dave RUTAN

-- Ni faru ion el ligno!


7 replies so far

View JeffP's profile

JeffP

573 posts in 851 days


#1 posted 08-27-2016 12:03 PM

I’m bumping this, as it is deep into the second page and in jeopardy of falling off the radar with no answers. I’m curious to see answers!

-- Last week I finally got my $*i# together. Unfortunately, it was in my shop, so I will probably never find it again.

View ksSlim's profile

ksSlim

1204 posts in 2349 days


#2 posted 08-27-2016 01:29 PM

I have noticed that sheet goods who’s country of mfgr. are off coast, seem to measure odd mm thickness.
ie. 3/4 ply is actually 19 mm.
I too will be dropping by to see the answers.
Thanks for asking the questions.

-- Sawdust and shavings are therapeutic

View Texcaster's profile

Texcaster

1138 posts in 1133 days


#3 posted 08-27-2016 01:48 PM

In Australia cabinetmakers work in millimetres and metres. Centimetres aren’t used at all.

When buying rough timber by the m3, you pay for nominal dimensions ex: 38mm (1 1/2 in) expect around 32mm dressed. 50mm (2 in) expect 45mm dressed. Sold in bound packs, depending on your order.

Two prices, broken pack, you select, more expensive. Or buy an unbroken pack. Unbroken packs can be 1m3 but usually 2 to 3 cubes.

Cabinet timber from the big box stores is sold dressed and by the lineal metre. The dressed dimensions are close to the advertised dimensions.
ex: 18mm x 180mm x 2.1m is 18mm x 180mm x 2.1m. or very close.

Lengths graduate by 100mm ex: 1m, 1.1m, 1.2m etc.

-- Mama calls me Texcaster but my real name is Mr. Earl.

View shipwright's profile

shipwright

7162 posts in 2257 days


#4 posted 08-27-2016 02:06 PM

In Canada a 2×4 is still a 1 1/2” x 3 1/2” (on a good day) and plywood is still 4’x8’ but sometimes it is sold a 18mm or 12mm instead of 3/4” or 1/2”. The thickness hasn’t changed, just the numbers. I think it is because of the massive amount of cross border trade. The American market is much bigger so it dictates the standards.

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fibreglass trees. http://thecanadianschooloffrenchmarquetry.com/

View miketheknife's profile

miketheknife

2 posts in 99 days


#5 posted 08-27-2016 02:15 PM

I’m from & live in the UK. & boards are priced & sold in metric Metres by cubic metres (m3) , the thickness is of planks is always in mm.

View Texcaster's profile

Texcaster

1138 posts in 1133 days


#6 posted 08-27-2016 02:58 PM

Texcaster wrote

“When buying rough timber by the m3, you pay for nominal dimensions ex: 38mm (1 1/2 in) expect around 32mm dressed. 50mm (2 in) expect 45mm dressed. Sold in bound packs, depending on your order.”

Correction

“When buying rough timber by the m3, you pay for the ROUGH dimensions ex: 38mm (1 1/2 in) expect around 32mm dressed. 50mm (2 in) expect 45mm dressed. Sold in bound packs, depending on your order.

-- Mama calls me Texcaster but my real name is Mr. Earl.

View Dave Rutan's profile

Dave Rutan

1430 posts in 1648 days


#7 posted 08-27-2016 06:56 PM

Thanks for the replies thus far!

It’s interesting that so far the ‘metrification’ of lumber dimensions is simply a new measurement of the imperial standard. I wish I could find that chart I saw from the lumber company in Germany where the ‘standard’ sizes were in even centimeters.

-- Ni faru ion el ligno!

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com