The slab steel does look light but it's hard to say definitively.
Is the implication that there aren't enough bars left going through the column? Bottom steel is missing? Something else?
Even if the slab steel is light, I still struggle with why the failure occurred now and not in the first 40...
If the engineers performing the assessment weren't able to identify a need to urgently evacuate building clearly the building official wouldn't have been able to either.
His assessment of other buildings from a structural safety perspective is probably not relevant.
Discussed above and agreed not relavant to collapse but just curious:
Were they really counting on moment frame action between column & floor plate system?
The shear walls do seem inadequate in the east west direction.
I'm with sdh4 and dold.... the pool deck could have racked the columns along column line 9.1
That would explain the sudden collapse if several columns were able to fail nearly simultaneously
The planted column Ingenuity pointed out is interesting, it seems like it would take a few structrual irregularities like this to fail in order to bring a stucture down so quickly.
Would be interesting to see if any of the damage/corrosion from the 2018 report affected any elements in that...
Looks like PFI - Pressure Injected Footings were the deep foundation system (S3 typical piling section) ?
https://www.keller-na.com/expertise/techniques/franki-piles-pifs
Thanks for the update. Very curious to see if there will be an update to load combinations which address compatibility with wind speeds specified in ASCE 7-10 and later.
Hello transmissiontowers, I was just checking in to see if we might get an updated ASCE 113 this year.
I copied a reply from an old thread below since they closed it:
We have a meeting in Feb 2018 to look over committee comments and after that we have a spot on the agenda of the ETS conference...
I'm looking for a good review course for the new 16 hour SE exam. It looks like the options are still pretty limited. So far I've found a Kaplan course (28 hrs) and a School of PE course (120 hrs), the only feedback I've come across said they were both decent and Kaplan generally received more...