Yellow Pine & Doug Fir Plywood

Buttolph Lumber carries a full line of plywood products.

Length	Rated Sheathing CDX	Square Edge (SE) Underlayment (U/L)	Tongue and Groove (T&G) Underlayment	B/C	A/C
1/2” (15/32”) 4x8	x			Special Order	x
5/8” (19/32”) 4x8	x	x	x	Special Order	x
3/4” (23/32”) 4x8	x	x	x	Special Order	x

Thickness	Fire Treated	Pressure Treated	Kiln Dried After Treatment (KDAT)
1/2” (15/32”) 4x8	x	x	x
5/8” (19/32”) 4x8	x	x	x
3/4” (23/32”) 4x8	x	x	x

Georgia Pacific (GP) - http://www.gp.com/build/productgroup.aspx?pid=1066
Roseburg Forest Products - http://roseburg.com/cgi-bin/s-mart.pl?command=showcatsub&cat=110_0
Scotch Plywood Company - http://www.scotchlumber.com/product.html

a. Grading Agency
- i. Fir Plywood
  - National Lumber Grades Authority
  The National Lumber Grades Authority or NLGA is the grading authority responsible for maintaining lumber grading rules and standards, most notably for Canadian lumber. The NLGA standards are approved and accredited by the Canadian Lumber Standards Accreditation Board (CLSAB) and by the American Lumber Standard (ALS) Board of Review. The use of such lumber standards and rules assures end buyers that all commercial species of lumber are produced with uniform design and performance.
- ii. Southern Yellow Pine Plywood
  - Western Wood Product Association
  For Western softwood species like the Yellow Pine, grading standards are provided by the WWPA or the Western Wood Products Association. It is a trade association that represents softwood lumber producers in 12 Western States including Alaska. The aasociation also provides technical services offering accepted standards for engineered wood such as Yellow Pine plywood.