First Floor Put Down

We got out of work late again tonight and did not get to the house until dark... but what a suprise when we got there! The first floor was put down!
The floor joists and plywood have been added. A bit of foam padding was placed where the wood meets the concrete.

It was too dark to see, but I fear they used the broken board we had seen yesterday. If it is the board I think it is though, it rests on the steel i-beam and is used as a barrier between the beam and the crossbeams... so not sure how important it is.... still annoys me though. I'll have to look closer tomorrow. Also, they smoothed the backyard out a bit more, it was dark, but it looked like there was still a dropoff, but not too bad.