10 10th Street - Cloisters Unit 52 - Renovation Questions - 4Good morning sir,
Thank you for the response. Yes, they pulled up some of the cracked
portions and I brought samples back to the office. They had a
lightweight bottom layer w/ a normal weight topping in some areas.
I got with a local architect we work with… he says the only current UL
assembly he could find that was wood framed floor w/ 1-5/8” perlite-sand
(lightweight) concrete was UL516 and was not sure what the actual
assembly would’ve been back then when they originally installed it. I
have attached the assembly from Georgia-Pacific that he sent over.
I will be checking all the current members to verify they have the
capacity for the assembly but it will definitely be less weight than
what was there.
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
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From: Arlington, Daniel <darlington@coab.us>
Sent: Thursday, March 5, 2020 6:08 PM
To: Adam Russell <arussell@russrow.com>
Subject: RE: 10 10th Street - Cloisters Unit 52 - Renovation Questions
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 <mailto: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>
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