Interesting find in the field today...

> https://surveyorconnect.com/images/uploaded/201409230123135420cb81deff7.jp g" alt="" />

This was somewhere near the Equator, I take it?

:good:

I thought that it was Kent's hat band (scaled to ground).

B-)

😀

44°N

> 44°N
>

Now do you see the advantages of ECEF coordinates?

Let me guess, your in central Wyoming, and that lath is a year old...

Central Oregon... Right about here...

https://surveyorconnect.com/images/uploaded/201409230447025420fb4670436.jp g" alt="" />

> ...near the Equator...

+/- 44°N

😉

Well Kevin from my perspective from DU I see that you have found the third letter of the alphabet.

RADU

:good: 🙂

"C" is for corner!

> "C" is for corner!

Speaking from my experience in Oregon, it's probably a "High C". (That was across the mountain in Eugene, though)

Sort of odd, but I can probably tell a bit about how it got

Like that.

A bit of technical trivia:

When a tree grows, it has a growth center. This is the middle of all the growth rings. And, it has a geographical center. This is the actual middle of the mass.
The greater this distance between these two centers, represents stress. A high stress log can break milling equipment, as the log is taken apart.

The side of the log with TIGHT growth rings is the PULL side.

The side of the log with EXPANDED or fat rings, is the PUSH side.

IF you mill a piece of finished product, with one side pushing, and one side pulling, you get curved lumber.

A sawyer who understands this, will mill for STRAIGHT lumber, most of the time, NOT maximum production.

Ever now and then, a real stressed piece shows up, gets wet, and dries, a few times, and some of these will make a full circle. This would be useful in the making, and production of wagon wheels, and other deliberately curved pieces.

So, it just depends on what you are trying to make, as to how you mill a log.

Somebody probably made that lath from a high stress log, and left the stress in the smaller dimension.

N

Kudos on the "photo bomb". A three man crew?

Sort of, we brought our GIS coordinator out for a little field work. Edge matching for the county GIS.

So that must be how they make a wagon wheel.

Sort of odd, but I can probably tell a bit about how it got

As a sawmill owner who cuts lathe for myself and some fellow surveyors, I see that happen primarily when lumber/lathe come from the pith section (3" center of growth rings) of the log. I cut several species of timber and don't really see big deal in how logs saw as far as the distance between the growth center and the mass center. Cutting the heart center (pith) and trees that lean hard often does cause unstable lumber. But the heart center is the primary culprit for wood movement as shown. Looks like a piece that was plain sawn (as opposed to quarter sawn) about an inch off of heart center.
When lumber is sawn from one side of a tree, the remaining side will tend to start bowing. For that reason, it is often best practice to take lumber off of each side of a tree in equal takes so as to keep the log from bowing during sawing.

One of the best things sawing timber has taught me is how scars heal. This has been incredibly invaluable in identifying fully healed bearing trees.
I also highly recommend using an increment borer. I can think of 2 recent instances where past surveyors misidentified bearing trees which turned out to be scars caused by even prior surveyors chopping open trees looking for blazes/scribing. Increment borers not only eliminate scars to be misidentified by future surveyors, they also help in getting ring counts from various parts of the tree to get its true age. I recall one recent previously misidentifed tree that was all hollow due to the prior surveyor's opening up the tree and instigating the rotting process. I proved the tree's age was too young to be original GLO by taking borings further up the bole where rot had not established.

Anyways, sorry for the rambling. Hopefully it is of some value to someone.

Sort of odd, but I can probably tell a bit about how it got

Yes, you are right about all that. The pith portion would do that. In SYP, (Southern Yellow Pine) and a large difference between the centers, will make some curved lumber!
N

"Bow D'Arc"? Bad pun, I know.

Andy