Talk:Plywood

Adding images
hey, i have nmn have 3 more... maybe it's not interesting for general readers to have these? Rotor DB 19:33, 6 March 2007 (UTC)

grade "X"
I have heard that in Plywood Terminology the "X" does not stand for "Exterior grade" but for the absolute lowest grade of plywood between the two faces... is that correct? 10:34, 3.7.2007, kananga

Exterior Grade plywood is NOT rot resistant. Any rot resistance comes from the type of wood, not the manufacturing process. CTJ

X could probably be used for different things, but it is commonly used for Exterior, as in Medite and Medex, which is exterior Medite. FR is Fire resistant. WR is Water Resistant. X isn't an industry designation,just a proprietary naming habit. Billyshiverstick (talk) 21:40, 6 September 2015 (UTC)

Coreboard?
I've been poking around the internet and I don't think that coreboard is a type of plywood. Can't find a good definition though. —Preceding unsigned comment added by 69.108.81.213 (talk) 02:01, 7 September 2007 (UTC)

Hi, I'm not sure what core board is, but MDF and PB and all those things are "composite panels". Plywood is veneer core, ie: layers of veneer. Veneer is cut on a saw or lathe, not reconstituted. Billyshiverstick (talk) 21:27, 6 September 2015 (UTC)

standard sizes
"Plywood can be sold in sizes up to 6 ft * 25 ft and by the scarf jointing of small sheets up to 6 ft *40 ft, however 6 ft*3 ft is the most common size." I've never even heard of 6 ft x 3 ft sheets. In the USA, 4 ft (102 mm) x 8 ft (203 mm) is the standard size of plywood with longer sheets available on special order. It is a well engineered standard size and coordinates with the rest of the construction industry. Do other countries use different sizes? JimScott (talk) 14:50, 8 July 2008 (UTC)


 * Plywood size 4x8 ft is sold as 1220 x 2440 mm in Belgium and most of Europe. Other sizes are 10x5 ft (= 3050x1525mm) and in Europe we have more and more 2500x1220 or sizes are limited by the size of the trucks available to transport them! 6x3 ft is a standard size but is pretty rare on the market (here in Belgium at least) JurgenG (talk) 15:57, 8 July 2008 (UTC)

6' x 3' is unknown in Britain where 8' x 4' is standard, sometimes in the metric equivalent of 1220mm x 2440mm. Erwfaethlon (talk) 07:04, 29 August 2012 (UTC)

WHY 4'x8' became the standard would be an encyclopedic thing to answer. I don't honestly know the answer either. — Preceding unsigned comment added by 24.104.255.46 (talk) 22:46, 20 March 2015 (UTC)

4 x 8 was chosen by Portland Manufacturing in 1905, but why is unknown. I've only found one speculation. Plywood Association might know. Billyshiverstick (talk) 21:29, 6 September 2015 (UTC)

History
There is not a History section or reference. Who invented it??? What were early manufacturing techniques? Scoutr45 (talk) 16:34, 20 September 2009 (UTC)

This information is provided by the APA: http://www.apawood.org/level_b.cfm?content=srv_med_new_bkgd_plycen —Preceding unsigned comment added by 173.14.54.169 (talk) 14:46, 6 November 2009 (UTC) The description of Egyptians glueing finer quality wood over a poorer substrate is a description of veneering, not of plywood construction which must at the very least have 3 thin layers of wood. . Erwfaethlon (talk) 07:07, 29 August 2012 (UTC)

Types of plywood
I know zilch about wood so I'm not about edit a page on wood.

In the Tropical plywood section under 'Types of plywood', the paragraph states: "UK, Japan, United States, Taiwan, Korea, Dubai, and other countries worldwide."

UK: country

Japan: country

United States: country

Taiwan:country

Korea: country

Dubai: CITY

I would say that a citation is needed here has Dubai, the Emirates for that matter, isn't, in any significant volume, a producer of plywood... or even an importer at a level of the other countries cited.

Personally, going through some data of the "Tropical Timber Market Report", "The Sustainable Tree Crops Program (STCP)" or the "International Wood Markets Group", the UAE barely ever gets mentionned.

I suggest to simply delete it from the text.

The city name was added on July 17, 2010 by Voodoopoodle, what seem to be a canceled account... non existing user or something. https://en.wikipedia.org/w/index.php?title=Plywood&diff=next&oldid=373584785

HF Netweezurd (talk) 22:13, 20 July 2019 (UTC)

Nobel's contribution vastly overstated
The idea that Nobel "invented modern plywood" is laughably wrong. Imperial Roman shields were made of plywood, for crying out loud, and the principal difference between "modern" plywoods and ancient plywood is the adhesive, not the method of peeling veneer from logs. Immanuel Nobel invented a rotary veneer slicer that was more popular than other veneer lathes and saws used to create plywood, and nearly all modern plywood veneers are produced from similar rotary slicers. That's it. Saying he "invented modern plywood" is like saying the guy who invented the electric toaster "invented modern bread". It's ludicrous. — Preceding unsigned comment added by 205.153.180.229 (talk) 16:53, 12 April 2012 (UTC)
 * but (s)he did invent modern toast. --71.186.225.22 (talk) 16:51, 7 June 2013 (UTC)

True that no one person usually "invents" something as complex as plywood, but it is true that Nobel's invention made it possible to start mass producing plywood as we know it. That was the significance, the new rotary figure, but moreso the mass production.

Rotary is "nearly all modern plywood" is wrong though. Fave veneers are more likely to be flat sawn, or rift or quartered, just like 1797 guy.

Define plywood is one thing. The Egyptians had veneer, a single sheet, and they used two ply and more. 1700s brought significant 3 ply, which is starting to look like what we call "plywood". One difference is the fact that old veneer banding was usually done one Roman shield at a time. I would call this making things from layers of veneers. The breakthrough in 1905 was the idea of "a sheet of plywood", which could then be cut up into whatever.

Would love you to add your Roman shield reference in. Billyshiverstick (talk) 21:36, 6 September 2015 (UTC)

T

Sizes
There must be either more information we can provide, and if not, we should just delete this section. Completely pointless. dothefandango (talk) 00:34, 4 June 2010 (UTC)

Manufacture section.
I tried to get rid of the "Manufacture" section in September and my edits were reverted. This is a poorly written topic and I'm just trying to make it better. I hope someone good at getting changes made in Wikipedia takes this up.

My point: First of all,'Manufacture' is located under the subheading of "Types". That makes no sense. Second of all, everything in it is already included in other sections of the article, particularly Production and Applications.

The 'Manufacture' section should be eliminated or merged into a re-written 'Production' section. —Preceding unsigned comment added by 75.147.139.26 (talk) 22:57, 12 November 2010 (UTC)

Mil spec
"All[where?] aviation-grade plywood is manufactured to specifications outlined in MIL-P-607"

If it is, that's the first time I've heard of anything that's made to the same specs all around the world. Tabby (talk) 02:56, 2 February 2013 (UTC)

CDX?
The CDX disambiguation page states that it is a grade of plywood, but there is no explanation of CDX here. Can someone address that? — Preceding unsigned comment added by 2601:9:3500:1570:4105:13E2:71DA:122F (talk) 02:59, 28 February 2015 (UTC)

Endangered Species and use of alternative raw materials
Lauan hardwood plywood was extensively used for wall paneling and readily available until recently. However, uncontrolled deforestation of extensive forests in tropical Asia has resulted in shortages of raw materials and scarcity has driven prices up to the point where consumers have been forced to develop alternative materials. Currently available wall paneling is primarily made of MDF with a wood surface veneer. MDF (Medium Density Fiberboard) is similar to particleboard but is stronger due to the presence of fibers.

Similarly, construction siding, roofing and flooring has shifted from common lumber to plywood to OSB (Oriented Strand Board) and newer manufactured materials such as ThermoPly (which is thinner than OSB but just as strong). --Mccainre (talk) 21:33, 5 March 2015 (UTC)

Proposed merge with Molded plywood
The Plywood article contains a listing of various kinds of plywood, but it does not appear to discuss "molded plywood." References will need to be found, though. Nick&#8288;—&#8288;Contact/Contribs 19:24, 2 September 2015 (UTC)
 * Don't merge - Subjects are different, Plywood is about the product plywood in general and Molded plywood is an article about the specific type and use of plywood. Merging would give undue weight to molded plywood in a general article about plywood. Molded plywood has "general references" which is acceptable, if any material is contested, then the template citation needed may be added by the contesting editor - although plywood and molded plywood are not really controversial subjects to require contesting unless there are glaring misrepresentations of fact.  Gmcbjames (talk) 18:04, 6 September 2015 (UTC)

Correct - Molded Plywood is a subset of plywood. We should include a section on molded plywood, that references the main page. Eventually, there will be enough about molded Plywood for it's own page.

FYI: The molding of plywood was intimately involved in the development of plywood, in Roman shields, and later furniture.

Upgrade Needed: also, "define plywood"
Hi gang, I am writing a series of articles on plywood for a plywood wholesaler. The wiki articles sure need work, as was noted above. One problem is that there are few quotable sources on plywood, as it is mostly something shops just use, academics don't talk about. It doesn't make the news, and it isn't a gott danged Dreadnough Class Battleship, beloved of historians. another issue is the definition of plywood. Are we referring to a modern "sheet of plywood", or "any two veneers glued together." The USDA did a lot of research into plywood since 1940. The plywood associations could help.

I'll do my best. I have 40 years experience using it, so I won't get my facts wrong. cheers Ben

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Higher grade plywood, multiple axis
Hi

If wood plies is low grade quality smaller delta v makes gauss normal distribution less spread.

If wood plies are of good quality two axis is sufficient. See trigonometry (cosinus and sinus).

The "multiple axis" is covered by two axis in that plane in which more axis is proposed.

/Johan

Johan157256 (talk) 21:50, 13 January 2019 (UTC)

Why dont someone into wikipedia just delete errors in text?

A couple of years ago wiki looked different, tried edit, nothing happen, because i was just some guy (im a bit of a fascist when it comes to these things so i agree), but whats the point if inside guys repeatedly make very misleading statements as facts? Johan157256 (talk) 00:29, 14 January 2019 (UTC)

I apologize for the anappy tone.

I will try making an edit

/Johan Johan157256 (talk) 21:58, 14 January 2019 (UTC)

Creep
The section on hardwood plywood says "Hardwood plywood is characterized by its excellent strength, stiffness and resistance to creep" What is creep? The other terms are common, but I'm not sure what creep refers to. A quick search on Wikipedia led me to an article about Creep (deformation), but I don't want to make a wild guess that this is correct and put a link to the article. The cited source doesn't define it either. Would somebody who is in-the-know please either clarify this or put in the link to the Creep article? —MiguelMunoz (talk) 04:58, 20 April 2021 (UTC)