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RE 10 10th Street - Cloisters Unit 52 - Renovation Questions (3)Adam, I would like to see an approved floor/ceiling assembly, fire-rated for 1-hour, come in with the permit application. You have to be comfortable with the weight. The existing lightweight concrete doesn’t seem that lightweight. Has anyone tried to get a rough estimate of a cubic foot of that? We can’t control the existing construction (especially the ceiling, below), but if you find a poured product that is part of a 1-hour rated wood floor/ceiling assembly and you are comfortable with the weight, I will probably approve it. Regards, Dan Arlington Dan Arlington, CBO Building Official City of Atlantic Beach, Florida darlington@coab.us <mailto:darlington@coab.us> (904) 247-5813 From: Adam Russell [mailto:arussell@russrow.com] Sent: Thursday, March 5, 2020 8:29 AM To: Arlington, Daniel <darlington@coab.us> Subject: 10 10th Street - Cloisters Unit 52 - Renovation Questions Good morning sir, I am working w/ Ranier, Inc. on a renovation to this model… and due to major cracks in the existing light-weight concrete cover on the floor (which we also assume served as the fire separation) they are completely re-doing the floor. They are trying to determine what hour rating the new floor system needs to be at. I would assume we could go back with the same material and it would be just like the original…. But I wanted to get your thoughts prior to suggesting. I believe a typical 1-5/8” lightweight (perlite concrete) topping is a typical 1hr assembly but that’s not my expertise…. Typically an architect provides this info. Due to it being a replacement of existing, I think going back w/ that should suffice but ultimately I am just verifying all of the structure is good for this and the few changes they want to make. Thank you, Adam Russell, P.E. VP of Engineering E: arussell@russrow.com <mailto:arussell@russrow.com> O: 904-503-3283 C: 850-556-8072 W: russrow.com <http://russrow.com/> 13241 Bartram Park Blvd #813, Jacksonville FL 32258 Follow us on social media <https://www.linkedin.com/company/russellrowlandinc> <https://www.facebook.com/russellrowlandinc/> <https://www.instagram.com/russellrowlandinc>