Reinforcement for Suspended Concrete Floor

Hire a qualified engineer or you could have trouble with these guys:

NEW JERSEY DEPARTMENT OF COMMUNITY AFFAIRS

Check the rules out, calculations might have to be defended.

We did it by "eyeball" back on the farm. If it collapsed, only members of the family would be injured or maimed.

You will need to have the proper permits and very likely a registered civil engineer's analysis of the design in the city.

You'll at least need to hire someone registered/recognized by the permitting authority to sign off on your design before you can get a permit.

Yes you will definitely want a permit, before they red tag you. You can be sure they want their permitting and inspection fees, and will definitely come after you for not paying those fees.

Everyone has to have an account in order to post on CR4. All you have to do is check the "I want to post anonymously" box when you post to show up as anonymous## on the post.

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I saw one on television only last week that was being suspended by a Braided rebar

going from the wall to the platform .It may have been attached to a metal piece.

It was pretty and solid.

My dad sent his wrought iron work out to an iron workers shop.ds

Consult the ACI, IBC, and RCD (American Concrete Institute, International Building Code, and Reinforced Concrete Design). Your plans will have to be stamped, dated, and signed by a registered professional in your state.

My first step would be to go to City Hall's Construction Dept. and ask for advise. They should have all the answers for you and recommend what steps you should take in your project. They might even have the specs that you need. I have built walls and done some additions to my home and the City provided me all the information. While you are there fill out all the permit amd inspection paperwork. You can do this on one trip.

Please tell me you aren't planning to put a pool on this? We already had someone try that!

Wow, no other comments after that. I guess none of the contractors have any quips about their experience with less or more steel being appropriate, embedment, too much or too little cover, or compressive strength of concrete being stronger than they used for their concrete slab out back. You should have left the reference to ACI 318 out.

Of note you also might have mentioned that no seismic loading was consdiered in your analysis. I don't know if they have any significant seismic code in NJ, but hear in California it can be an important consideration, especially if you don't know what the actual final use might be ( a packed party on the porch and a earthquake hits).

The first thing I would like to say is thank you very much for the information and preliminary analysis. I realize that I will need to hire a licensed structural engineer in NJ to approve the final plans, but the information that you provided gives me some good background to so that I can have an inteligent conversation when I meet with him.

As far as my background is concerned I am not a contractor or builder. I am a degreed electrical engineer. While I do not have the same background as you when it comes to the structural design aspects of this specific project, I do undestand the fundamental load, sheer and deflection principles that you have highlighted in the analysis. The project that I described is for an addition that I am designing for my own house. I designed and built the house myself, as well as several outbuildings over the years. The design work for this project was done using Chief Architect. Like all of the other designs, the plans will be reviewed by a licensed professional before any work starts.

As far as the foundation is concerned, it will be purpose built for this application so incorporating the proper reinforcement and tie in for the suspended plate floor will not be an issue.

If anyone can recommend a good structural engineer that is licensed in NJ who can help me with this project I would greatly appreciate it. I am located in Somerset County.

Thanks again for the help.

Hey There RCE, howzit going?

Yeah, I either scared the poor Contractors, or confused the living Ch*T outta them! LOL

You're quite correct that I should have included mention of seismic considerations. I didn't do so on purpose for several reasons. First, the OP is going to be forced to hire a NJ PE to finalize the design where seismic design & analysis may be considered.....I'm not familiar with the NJ State Building Code to know if them definitely require it. Generally, I try to stay away from NJ whenever possible! LOL If that code mentions structural design requirements pursuant to ASCE-7 like New York's Building Code (code changed to include seismic considerations finally a half dozen years ago or thereabouts), then the design and analysis of the slab must include seismic checks, etc.

Secondly, I didn't mention anything about minimum lap requirements for the rebar, and overall Global Stab of the structural slab and its support mechanisms, let alone including anything about checking the existing foundation adequacy....all of that will fall upon the consultant(s) the OP hires.

I'm not about to give him everything for nadda....there's no such thing as a free lunch in my book.

Okay, the slab thickness may be skinnied-up a tad if a deflection check of the proposed slab (with necessary mods) determines adequacy....there again, nothing for free.

Have a great day!