Douglas Fir Timbers and Soffits
Available Grades in all Species
Lumber grades, assigned on the basis of visual inspection and/or mechanical testing, are divided into three basic classifications which reflect the intended end uses:
– Structural Lumber: for residential, commercial and industrial uses is graded for its performance in load bearing or load-carrying applications. Physical working characteristics are the primary considerations and appearance is secondary.
– Appearance Grades: are assigned to lumber intended for applications where appearance is the most important factor. These grades cover products ranging from the exquisitely beautiful to the most utilitarian. They may be sold as Select, Finish or Common boards, run-to-pattern for siding and paneling products, or used for a variety of purposes.
– Factory and Shop Grades: are assigned to lumber intended to be recut, to recover the clear portions in the piece fort manufacturing into other wood products such as windows, doors and cabinets and for moulding , trim and specialty products. Below is a list with links to some examples of the grades we carry at Bear Creek Lumber. Not all grades are represented, please contact us for actual wood samples or digital pictures of any particular grade you may be interested in. Note that some species have their own particular grading rules.
List of Available Grades
Note: all pictures are meant for a general grade description. If you want to see a more defined grade image, please let us know. We can email you pictures and grade rules.
Appearance Board Stock Grades
Structural Post and Beam Grades
Table describing the grades #2 Clear and Better through #4 Clear and Better for rough green clears 5″ and thicker.
|Grades||#2 Clear and Better||#3 Clear and Better||#4 Clear and Better|
|Face Graded||All grades and sizes. Grade from best face and corresponding 1/2 of edges.|
|Irregularities, # permitted||3 on face. 4 on back||4 on face, 5 on back||never in maximum size or number in any one piece.|
|Rate of growth||Average 6 rings per inch||Average 4 rings per inch||Plus|
|Slope of Grain||1 in 8||1 in 6||1 in 4|
|Split (one or equiv)||Width of piece||Width of piece||Width of piece|
|Pockets||Medium - 6" long||Medium - limited to 6" long||5 medium (1/8"x8") or equiv. smaller|
|Pitch Streaks||Equiv. to pockets||Equiv. to pockets||Scattered|
|Knots / measured average diameter||sound on reverse face only / 2"||sound / 2" and less||any quality / 4"-2" or equiv. smaller|
|Sap stain||1/2 face medium||1/2 face medium|
|Heart stain||slight||medium +|
Face: 15 per sq ft
Back: 30 per sq ft
One: 1/4" on face
Two: 1/2" on back
1/8 width x 1/6 length (or equiv. area)
1/4 thickness (50% more on back)
10% of face
25% of back
|Cut out||1 cut out 8" from end in 18" longer*||1 cut out 8' from end in 18' or longer*||4", 4' from an end in pieces 12' and longer|
|* Provided that balance of piece is practically free from other irregularities, limited waste is one foot.|