In the 1940s Doug first shipped for framing was green so no harder to nail than spruce , SPF stands for spruce/pine/fir . You very occasionally get for shipped in a mill run mix out of BC . In larger dimensions like 2x6 ,8,10 we will hold those lifts out as you can ask a premium on fir , but in 2x4 it just gets shipped .
In the 1950s and 60s my company was the largest importer of California redwood for the window and door industry . That disappeared overnight when aluminum became cheaper faster ( and a terrible choice)
Our next disaster, up until 15yrs ago we imported 20-25 containers a year of Russian birch , processed in Finland into hockey stick blanks . About a 3million hockey sticks a year , we sold blanks to Sherwood , Hesper, Kitchener (then Bauer) , piggy backing off the designs of Koho . Then some guy figured out carbon fiber . Poof , industry over.
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