I'll see your Pseudo-tsuga Menziestii and raise you a Robinia pseudoacacia....

Show offs

At one time I could buy Doug Fir.
I "think" it came from out West.
Our normal Structural Select is Hem Fir.

^^^^
"Hem Fir"; hemlock and any other true fir (silver, white, grand, noble, etc). But unknown to most people none of the superior Doug fir makes it into the hem-fir sort.

In framing lumber grading Doug Fir is in it's own category (D Fir) or sometimes included with Larch (D-Fir-L). The medium strength firs are grouped together (Hem-Fir or H-F) and the weaker spruces, pines and firs are in their own group (S-P-F). Southern Yellow Pine is usually in it's own category (SYP) and is mostly used in treated lumber and plywood.

There have only been a few occasions when I've had architects specify Doug Fir. Almost always it was on longer clear spans in residential construction.