I met with the mechanical sub on site this morning so that he could do his final "take offs" on the duct work. We looked over the trenches and he took some measurements and left for his shop to start the fabrication process. I started marking up the plumbing layouts on the ground so that those could be dug as well. All in all there isn't going to be much dirt left when we are finished with all of the trenches (see above photo).
There are so many systems running beneath the slab, that it is surprising that we have room for them all. Because the fabrication process for the ducts is going to take longer than expected it looks as though we may find behind schedule. I won't know till next week, but with the Thanksgiving holiday I don't know how we are going to get everything trenched and laid out by the end of next week.