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Lumber Information for the Truss Industry

The U.S. structural building component industry uses over 8 billion board feet of lumber annually. Truss manufacturing uses structural grades of 2x_ dimension lumber that is either visually graded or machine graded. The species of lumber used by a particular truss manufacturing operation is based on what is readily available in the regional market. In general, southeastern U.S. truss manufacturers often use Southern Pine; western manufacturers use Douglas Fir, Larch and Hemlock Fir; and northern manufacturers use Spruce-Pine-Fir. To learn more about the strength properties and details of these species, contact the appropriate lumber marketing agencies. They have great information and helpful technical staff people who can answer almost any lumber question that is not truss-specific. Canadian Wood Council - for Spruce-Pine-Fir, Douglas Fir-Larch(North) and Hemlock-Fir(North) Southern Pine Council - for Southern Pine, also called Southern Yellow Pine Western Wood Products Association - for Douglas Fir-Larch, Hemlock-Fir, Spruce-Pine-Fir(South) More Links - to grading and lumber marketing agencies

Secure PDF files contain secure SBCA copyrighted material that can be viewed and saved, but not printed. To order paper copies, see the Catalog.

LUMBER GRADES Top
Lumber Grades TTB	Secure PDF Catalog
Lumber Grades FAQ	Article
MOLD ON LUMBER Top
Mold on Wood Structural Building Components TTB	Secure PDF Catalog
Builder Advisory on Mold TTB	Secure PDF Catalog
Whose Mold Is It?	Article
Keeping an Eye on Mold	Article - Part 1 Article - Part 2
Mold & Construction	Article
Dealing with Mold: Component Manufacturers Address Customer Concerns	Article
Letter from WTCA President to Builders Re: Mold on Components	PDF
PRESERVATIVE TREATED LUMBER Top
TPI/WTCA Guidelines for Use of Alternative Preservative Treatments with Metal Connector Plates (rev. June 2007)	PDF
Quick Guide Table for Alternative Preservative Treatments with Metal Connector Plates	PDF
Corrosion Information from Simpson Strong-Tie	Web Link
Pressure Treated Wood and Steel Framing - the Steel Framing Alliance	PDF
Corrosion Protection News from USP Structural Connectors	Web Link
Presentations on treated wood and steel corrosion from:
Arch Wood Protection	PDF
Simpson Strong-Tie	PDF
USP Structural Connectors	PDF
WOOD INFORMATION Top
Wood Handbook - from the Forest Products Laboratory	Web Link

Want more information on this topic?  View the Technical Q&A database.