Dynagrade - cost effective strength grading
Useful links:
Precigrader, NEW equipment for precision strength grading based on the Dynagrade technology.
Lumber Stress Grades and Design Properties, a PDF-doc. covering Ch. 06 in Wood Handbook. The principles of grading is described.
MSRLPC, MSR Lumber Producers Council (North America)
North American lumber market facts, the Random Lengths
Where to find agencies to certify a mill for strength graded wood products: