The green douglas fir was a tree two weeks ago. It will change
dimension, warp and twist. Even if you let it acclimate in your
basement for a few weeks, you'll have a bunch of acclimated, warped,
twisted lumber. It won't be pretty, but could work ok for a bench
frame if you're careful.

wrote:

1. Has anyone had failures using construction grade type two-by stock
to make a workbench, and what type?

2. If I get the "Green Douglas Fir" and just let it sit around for a
while, how long can I expect it to take to dry/acclimate to my
basement?