Advertisement

Home Search Subscribe to E-NewsE-News ArchiveSend Us News
Forest Products Lab Wood ID Guru to Speak at Symposium
Hey wood ID wonks, think you could eyeball different species from the same genus?

The Taj Mahal of wood species anatomy laboratories is sending one of its researchers—The Guy to talk to about speciation—to the National Wood Flooring Association Certified Professionals Inspector Symposium, which this year will be held the day before the trade show starts, on April 16.

Dr. Alex Wiedenhoeft is a research botanist in the Center for Wood Anatomy Research at the federal Forest Products Laboratory in Madison, Wis. His two seminars are “Understanding Dimensional Change Coefficients” at 10:15 a.m, and “Wood Species Identification” at 1:15 p.m.

Wiedenhoeft is the associate editor of the International Association of Wood Anatomists Journal and serves on their board of directors. He holds adjunct professorships in the forestry and natural resources department at Purdue University and UW-Madison's botany department, as well as a foreign professorship at the Universidade Estadual Paulista in Botucatu, Brazil.

Somehow he still has time to study  wood usage, botanical and forensic wood anatomy (he identifies wood for everything from FBI crime scenes to plane crashes) and biocentric wood science.

In collaboration with fellow researchers, he’s also developed a camera device that can identify a wood species in 30 seconds, which he’ll demonstrate during the Symposium.

You will find Dr. Alex an engaging and exciting speaker. The Guild first had Alex in 2010 at North Carolina State University, along with Dr. E. Wheeler, teach us a three day introduction to Wood ID.
Dr. Wheeler was retired but returned to co-instruct. Her Wood ID hobby is fossil wood.
NCSU let us examine some original wood slides /leaves from long long ago they had in their library.
In 2012 in Charleston, SC Alex repeated his class for the Guild by himself after a one day class by Roberto Nunez, a NCSU concrete engineer professor who also has his own construction company.
One of the wonderful things about having Alex teach is he will set up a temporary link for you good people to download his presentation. He can do that since everything he does, unless under a protective contract with FPL, belongs to us, the taxpayers.
Last, the Guild just signed a contract with Alex/Glass/FPL to do a class for us in late Summer of this year at the FPL. We will have fun again.
Comment By Selva 'Lee' Tucker At 3/19/2014 1:34 PM
I re-read and I missed the mention of his new camera software for ID'ing wood. He had mention that to us in Charleston. He said something about being able to use it on our cell phones. They were still working out the bugs in it then.
This is good news, but I still enjoy doing it the old fashion way for fun. Slice a sample, and get out my lens.
Comment By Selva Lee Tucker At 3/19/2014 2:23 PM
It will be great to hear Dr. Alex put the dimensional change at time of mfr topic to rest once and for all. When we track flooring from time of mfr to installation to inspection 9 to 12 months later. I have seen flooring milled at 3', placed in dry storage for 9 months, gone from 7% to 8%, gained .011' in width. Then encompass mfr +/- width allowances we could see a dimensional change of .020' before installation. Making it impossible for an inspector to back calculate the MC at time of mfr.
Then the next great thing we will hear, will wood return back to it's original milled size after going through 1, 2 or 3 seasonal changes, do any species return back 100%? Which species have better rate of return change, domestic or exotics?
Can't wait to hear Dr. Alex, this should be a great class.
Comment By Roy Reichow At 3/19/2014 5:59 PM
Is the camera device that can identify a wood species in 30 seconds available for sales? If yes, where can I get it?
Comment By KG At 3/19/2014 7:10 PM
Is there any such classes in Asia by Dr. Alex?
Comment By KG At 3/19/2014 7:15 PM
Roy,

I have heard Alex Wiedenhoeft speak; I also know Alex a little bit. The one thing I can assure you is that he will tell you the truth. He is one of the few rare people who travels around the world and gets the ear of government leaders; our own Justice Department listens to him. It is an absolute privilege to have the opportunity at Symposium to hear from someone with his credentials. All of us simply need to listen to what he is saying; he will tell us if we approach his presentations with an open mind and not premeditated ideas that we have held on to and refuse to let go of. I was one of those types at one time. I'm not any longer. Alex knows where we live as inspectors and wood flooring professionals. He is not only going to help a lot of people in Nashville, he is going to inspire everyone who listens to him. I'll be on the front row if there is an available seat left.
Comment By David Paal At 3/20/2014 9:26 PM
These would be great sessions to videoand also transcribe for review later
Comment By brickmanconsulting At 3/24/2014 2:02 PM
Roy,

Was the wood that was 3' wide and gained .011' with a 1% gain/change in moisture content a White Oak? I ask this because White Oak has a dimensional change of .00365'. taking your .011' dividing it by your 3' board would bring it to .00366' change/gain per inch. The +/- width allowance doesn't mean anything when you have the manufactured size +/- .005 (per NWFA/NOFMA International Standards) plus the actual moisture content of the board at the time of manufacture. That moisture content is stamped into that board along with the given size. Every miniscule change in the moisture content will change the size of that board up or down from your 3' by .011 or .01095 (Actual) per1% change in moisture. See ya in Nashville.
Comment By Bill Zoetvelt At 3/24/2014 7:54 PM
Roy,

Was the wood that was 3' wide and gained .011' with a 1% gain/change in moisture content a White Oak? I ask this because White Oak has a dimensional change of .00365'. taking your .011' dividing it by your 3' board would bring it to .00366' change/gain per inch. The +/- width allowance doesn't mean anything when you have the manufactured size +/- .005 (per NWFA/NOFMA International Standards) plus the actual moisture content of the board at the time of manufacture. That moisture content is stamped into that board along with the given size. Every miniscule change in the moisture content will change the size of that board up or down from your 3' by .011 or .01095 (Actual) per1% change in moisture. See ya in Nashville.
Comment By Bill Zoetvelt At 3/24/2014 8:23 PM
Bill,

I'm sorry but the actual number is .01107' per inch I just rounded it off to keep it simple. NWFA/NOFMA +/- allowance is .005' however that doesn't apply to all mfrs who are not members, their +/- numbers could be doubled. Then grain orientation within the plank plays important role as well. You can have quartered on one end and with grain turn plain sawn on the other, remember Bill we're only speaking of averages.
Say when you come to Nashville bring some of those unfinished planks with the MC & width stamp on the back.
Comment By Roy Reichow At 3/25/2014 9:36 AM
You never answered the question Roy. Was it a White Oak floor?
Comment By Bill Zoetvelt At 3/25/2014 9:45 PM
Hey Roy,

I am here at the wood science class held by the Guild and a great question was asked. Please help me understand what occurs in the manufacturing process to cause the wood flooring to defy the laws of physics?
Comment By Bill Zoetvelt At 3/26/2014 12:00 PM
The manufacturing standard does not apply except at the time (within minutes or even hours) of manufacture. For instance, A piece of wood flooring is manufactured at 6% MC then is immediately exposed to an RH that increases the MC. You should not expect the manufacturing allowance to apply after the MC changes because the width would also have changed. The allowance is the permitted variation during the machining process, NOT what happens later
Comment By Howard Brickman At 3/26/2014 2:27 PM
Comments :
           
Name :
 
Email (For verification only; e-mail will not be displayed) :
 
       
Comments :
 



CONNECT WITH HF
FEATURED SUPPLIERS