Re: Cantilever Engineering
You'll probably have your own code for such things, but I can only quote the SAA (Standards Association of Australia) Concrete Structures Code, which specifies a minimum 30mm cover for concrete slabs "exposed to the weather or ground/fresh water" and 20mm if not so exposed. You could argue that the underside is not exposed to the weather or water, but theoretically a cover of 20mm would still be required. So it looks like 20mm cover underneath the rebar in the 'suspended' section, and 30mm cover on top in the 'cantilever' section would be the closest you should go.
The code also specifies a couple of "general requirements", which may be worth thinking about too: "The cover shall not be less than the nominal diameter of the bar ... being protected." and "... in walls and slabs the cover shall also not be less than the nominal maximum size of the aggregate."
Others might also want to weigh in on this one - your code could well differ from that here.
Hope this helps,
Paul.
Originally posted by Ken524
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The code also specifies a couple of "general requirements", which may be worth thinking about too: "The cover shall not be less than the nominal diameter of the bar ... being protected." and "... in walls and slabs the cover shall also not be less than the nominal maximum size of the aggregate."
Others might also want to weigh in on this one - your code could well differ from that here.
Hope this helps,
Paul.
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