Frame sitting off slab

I had this very drama self induced. Talked to an engineer. He pointed me to 'load path' in AS1684 and then minimium bearing. He said as long as 2/3 of the bottom plate was supported he would sign it off.

kippers01

This is a good article about the legal status of Australian Standards.

https://hia.com.au/resources-and-advice ... o-use-them

100%, talk to an engineer before the Salesman, Design Broker, Architect, builder hits you with , "that will all be sorted out later... that's someone else's job"
From my expert experience (worse case)
After you'll probably require a specialist repairer because
1. Builders will keep shifting the blame to others while nothing gets done to fix the structural faults
2. The trades are long gone, besides do you really want those guys back?
3. You won't trust any fool to do the repairs and nor can they certify the repair work as structural repairs aren't dealt with in the NCC
also you'll need to go back the AS**** structure codes.
4. Once the clients are presented with the certified details, facts, data/proofs, and repair costs...(they are absolutely p!ssed, sh!tted and shattered (pss). Humour)
5. As for the regulations you'll find out mediation is a waste of time , then the regulators will direct you to the civil courts
6.7.8
There's no jokes and laughs at that point " the battlers have run out of money, but I'll do the best I can to fix the site issues.."
Now you can see how important it is to start off on the right structural footing as for some salesman your first point of contact in the building process don't give a sh!t about your build, That's the point the rot sets in (humour)

So if slab is not good/long enough to support the frame, how are you planning to support the cladding? Are you building a brick veneer home?

If it is a granno mess up, let them fix it.

Your frame is a mixture of Australian and Chinese coil.

Whilst the frame overhang isn't specifically cited in the BCA, it comes with a Reg 126 and it's span and engineering computations are spat out by the FrameCad (or it's chinese cousin) software the light weight framing machine details with.

It's very likely that overhang voids the support required for the framing and thus voids the engineering the frames were supplied with.

This is your angle, not the statutory one. Find out who the supplier of the framing is, as they are the ones with the PI insurance attached to it's structural integrity and design. They didn't design it and comp it to overhang a slab by 35mm...

Ask the builder for a certificate of compliance from the frame supplier, if they supply you one - Show the photo's to the frame supplier to confirm their frames are warrantable under this application and overhang, highly unlikely they confirm it, which gives you all the ammunition you need for the builder to fix it.

If they don't fix it, given this is related to structural support, they will be legally liable for essentially every issue with the building from that point onwards. They will have voided every manufacturers warranty for every single construction system they attach to that frame (Cladding, plaster, paint, render etc) and will have no recourse for back to back coverage under any of their installation procedures.

Good points that logically cannot be argued against but the BCA was changed a couple of years ago to delete manufacturer's recommendations. Not sure whether the very good points you make would stand but it's certainly worth a try.