Vance,
That model is not accurate where you have the patio slabs. The beam along column line 9.1 is just the slab step and wouldn't look like that at the patio to living floor step since it is only a 7" step.
Reposting a picture that Demented posted earlier for a different reason. Look at column '38'. This would be column M/N15 (midway between column lines M & N on column line 15. It is just north of the spa and supported relatively short spans to the south and east because of the spa and pool. It...
I was going over some of the NIST photos and found a few things of interest:
It looks to me like this was a pool slab with original tile on the right and a planter on the left. Look at the concrete deterioration under where the planter would have been.
This one shows another piece of slab. I...
The more I look at the slab step from pool to patio level in the K-M 9.1-11.1 area, the more concerned I get. The construction details show a couple of bottom bars and a couple of top bars making a beam of sorts at these slab transitions. However, the pool level slab is basically hanging from...
Speaking of that beam, is it just me, or does it look like natural concrete when the rest of the columns/ceiling are painted white. Is it possible that this was an older repair?
GPR, 1) There is not really an offset. 9.1 is column CL, 10 is outside line of building. 2) Pool deck is 18" below lobby level. 3)BM A is required at column lines K-M because there is a slab step mid slap between 10 and 11. Column line I steps down the full 18" on line 10, so beams would not be...
Thermopile:
A technicality, but I believe that the beam in the picture is actually column line M (M10-M11), but that doesn't change anything. Note that there is an 11" floor drop in the middle of that beam, making a step in the beam. To make matters worse, they plunked down a very large planter...
