step downs in waffle pods
step downs in waffle pods
(OP)
I was under the impression that step downs in waffle pod slabs would also require the pad to be stepped down to maintain a constant beam depth. this is how i see it in the standard details given in as2870. for example, if we have a 385mm deep waffle slab with say an 85mm step down to a corner patio to the back of the house or even a garage step down, would you not have to lower the finished pad level by 85mm to maintain the 385mm beam depth (not mentioning the appropriate lap distance behind the line of step down as well). what about a 50-70mm shower setdown in the middle of your slab? Do you just drop back a pod size or do you lower the finished pad height locally around the set downs??
Always thought lowering the pad with the step downs was a must. Getting told otherwise. Am i wrong or do I have lazy/incorrect builders?? Any thoughts guys?
Always thought lowering the pad with the step downs was a must. Getting told otherwise. Am i wrong or do I have lazy/incorrect builders?? Any thoughts guys?





RE: step downs in waffle pods
What I have seen done before is for example an M class, they do the 385 slab (300 pods) then in the garage or set down areas go down to the 310mm slab (225mm pod)
so at minimum you have the M class requirements.
Otherwise you would have to model and analysis the lab if you go thinner than required by as 2870-2011. However I typically do multistory developments so I am sure there are more experienced residential engineers on here who can correct me if I am wrong.
"Structural Engineering is the Art of moulding materials we do not wholly understand into shapes we cannot precisely analyse, so as to withstand forces we cannot really assess, in such a way that the community at large has no reason to suspect the extent of our ignorance." Dr. Dykes, 1976
RE: step downs in waffle pods
RE: step downs in waffle pods
http://www.nceng.com.au/
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RE: step downs in waffle pods