Daiku....we don't run our posts through the floor....We make sure the guy that did the layout for the floor truss system doesn't obstruct the posts....then we pre set the basement posts based upon owners preference....If its going to seen it gets a conventional timber...If its going to be sheetrocked...it gets 2x8 screwed...
The frame posts sit right on the subfloor...and screwed with GRKs from the bottom.....then it also gets attached to the SIPS panels which are screwed to the floor...We usually tack tar paper on the bottom to help keep them from wicking water is the site gets wet..
