Follow us on Pinterest
Welcome, Guest! Log In  |  Join Now
More
Close

What Wood Is That?

Study the pores
239_5_2

Study the pores

Study the pores

Hardwoods that grow in the earth's temperate (non-tropical) zone display annual growth rings in their wood's end grain. These growth rings have both an earlywood portion and a latewood portion. The wider earlywood reflects the rapid growth of the early season; the narrower latewood, the slower growth of the later season.

Within the earlywood and latewood portions of the grown ring you'll find pores. It's the size of the pores and how they're distributed in the growth rings that classify a hardwood as either ring-porous, diffuse-porous, or semi-ring-porous.


pores_art_1

Ring-porous species show a sharp distinction in the size of the pores of the earlywood when compared to those in the latewood portion of the ring. Ash, elm, hickory, red oak, white oak.

Diffuse-porous species show little difference in pore size no matter where they appear in the growth ring. Basswood, red alder, sugar maple, sycamore, yellow birch, yellow poplar.

Semi-ring-porous trees have a gradual change in pore size across the ring. Black cherry, black walnut, pecan, tanoak.

A few genus trees, such as the hickory (Carya), fall into more than one classification. That's because species within the genus -- in this case the true hickory, notably shagbark, and pecan, also a hickory -- are different in their pore size and growth-ring distribution.


Continued on page 6:  Rays help, too

 

close


Comments (1)
8221074756
ED WOOTEN wrote:

I've just mall you your payment for $ 28.00 dollars ed

12/30/2009 03:44:53 PM Report Abuse

Add your comment

You must be logged in to leave a comment. Register | Log In

Please confirm your comment by answering the question below and clicking "Submit Comment."

 

 
 
Connect With Us
more smart savings
  • Recent Posts
  • Top Posts
See More >