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2 Thoughts. If the guy spent the night in a hotel because he hit a column, it was to avoid a DWI. If a roof AC unit fell, it may have been unbolted by the roofers.

Looking at the column photos, the pool deck patio slab looks to have failed in negative moment bending.

The pic of the balcony looks like 2 concrete planters, one of which has a lame and crooked palm tree

The posted plan explained to be top bars shows #4 cantilever bars and based on the quantities shown they appear to be about a 13" spacing.

This article says a crane was at the building. https://www.usatoday.com/in-depth/graphics/2021/06/24/florida-beach-condo-buildling-collapse-investigation-underway/5333761001/

This USA Today article says a crane had been at the building. https://www.usatoday.com/in-depth/graphics/2021/06/24/florida-beach-condo-buildling-collapse-investigation-underway/5333761001/

The notes posted by Warrenslo say 8" slab floors and roof, but the parapet detail shows a 6" slab. This may be why Morabito said to verify the slab thickness. Note 6 says for reinf at cantilever #4@13". If this was additional it should say additional.

JS5180, I read on this thread page 1 I believe, that a crane had been on site the day before the collapse. The question raised in that post was where had the crane sat? I apologize if in error, but based on the fall protection plan drawings, it looks like the roof is mostly encircled with...

The next of kin and the health department would want those bodies removed before decomposition. Properly imploding the still standing building will preserve the collapse site vs if the building is left to stand it is like;y to collapse onto the existing debris. The two engineers brought in...

This building was 40 years old which is 14,600 days, but this collapse happened the day after a crane was loading roofing materials on the roof and the day after fall protection anchors were installed. The parapet detail Warrenslo posted has a 5'-6" cantilever, but when analyzed the moment...

According to the original drawings, lower strength concrete was specified in the columns of the top few floors.

Running with the post by Warrenslo that the top 3 levels collapsed first, along with the fact that there was an on site crane lifting roofing materials onto the roof the day before, there is a good chance the roofer overloaded a section of roof with materials. Also, on concrete slab roofs it is...

Nattel Construction, Inc. filed as a Domestic for Profit Corporation in the State of Florida and is NO LONGER ACTIVE. This corporate entity was filed approximately forty-two years ago on Tuesday, June 19, 1979 , according to public records filed with Florida Department of State. I don't know if...

The firms they brought in, Musser Rutledge and KCE are impressive. I have worked with Alan Kilshimer, whom is principle of KCE, and he can take control of a heated meeting like nobody else. Back in 2014 the talk was he billed $600/hr for this type of work.

I disagree that the unzipped rebars do not indicate a defect. While it is normal for rebar to pull out of concrete with enough down force, what is not normal is that there is no concrete adheared to the rebars. I base this on engineering for a demo company for 20 years. Either the concrete...

If the building was 120 feet tall a 30 psf wind would exert about 3,6 kips per foot shear. I doubt there were enough piles to take that and the original designer used the 1st floor diaphragm to transfer passive soil resistance from the foundation walls. Once the pool deck slab diaphragm failed...

I have read 90% posts on these threads and have several observations 1.) The drawings detail 3/4" cover on the slab bottom bars. 2.) I am an engineer for a demo company and our workers spend weeks knocking concrete off rebar so the clean rebar can be sold for scrap, 3.) For the slab bottom...