Douglas Fir Lumber Grade Chart

Lumber manufacturer in canada produced for either the structural or the appearance market.

Douglas fir lumber grade chart.

Construction grade lumber is used for light framing. Douglas fir is technically not a true fir abies genus but is in its own genus. First and most significantly the nhla grading system as its name implies is limited to domestic hardwood lumber. 4 square j grade produced in our spf mills located in alberta and southern british columbia our clean and bright spf 4 square j grade lumber sets the standard for north american lumber.

J w lumber specializes in rough douglas fir from small 2 2 s to 12 12 timbers and larger available in lengths exceeding 30 feet. Compression parallel to grain f c modulus of. 2 lumber is the most common grade for framing. Extreme fiber stress in bending f b psi tension parallel to grain f t horizontal shear f v compression perpendicular to grain.

To the left is an example of a grade stamp with each part numbered and defined. As one of the most common species in american forests douglas fir is strong and straight grained with its tight know pattern premium douglas fir is a beautiful wood to use exposed. The tree itself grows to be very large and yields a large amount of usable lumber and veneer for plywood. It is an incredibly valuable commercial timber widely used in construction and building purposes.

Lumber grading construction lumber in order to help you determine what lumber you need for a specific building project and what grade you are receiving a grade stamp is placed directly on the softwood lumber that includes information about the lumber s grade moisture content species and other characteristics. Know about spf lumber douglas fir lumber canadian lumber s grades moisture content of structural lumber lumber grades canada. Knots must be sound firm encased and tight. That means of course that it does not encompass exotic hardwood species such as ipe or mahogany or softwood species such as red cedar or douglas fir.

With minimal defects small knots and its bright white appearance this product is widely accepted as the premier product for modular and panelized. Know all lumber s standard grades seasoned to the consumer s needs. Structural wood lumber engineering properties chart 2 to 4 thick 2 and wider. Douglas fir structural timbers are available on a special order basis.