stud size for 3.3m heigh non-load bearing external wall

We are currently raising our house, but will be doing it in two stages. The first is to raise and rebuild the laundry underneath. The second is to build a floor 300mm above the ground and enclose the rest of the underneath of the house, due to almost insignificant overland flow path.

At the moment the house is 3.3 meters of the ground, with slab, it will probably by around 3.2.

Since the walls for the laundry will be non load bearing, as they just fill the gaps between the shs, what size studs should be used?

I have had a look at AS1684, but it is not clear to me what should be used, as section 6.3.6 only talks about internal non-load bearing up to 2.7m.

Thanks for your help.


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