Apr 23, 2021 2:11 pm
Hi! I am building a new house in South East suburb in Melb (Clyde North). Geotech report notes P class site due to fill with underlying M soil type.
Stamped plans from surveyor who issued the building permit noted 385mm waffle slab (300mm pod 85mm concrete top) to suit soil report. However, now the builder wants me to sign a variation doc to alter the plan to reduce slab height to 310mm overall (225mm pod) as they said engineering plan reflects this reduced height slab. My concern is that the less height it is the weaker the slab is? Would love to get some advice/thoughts from own experience or professional opinion on this matter please! I have fixed house/land package and just concerned that the engineer was trying to be economical for the builder.
Re: Advice on waffle pod heights please3
Apr 24, 2021 1:41 pm
I'd hold them to the deeper pods on class m.
Better to be slightly over engineered than to have issues in the future. Concrete is relatively cheap
Thanks for the reply! The builder told me 300mm pods are for H slab, not M and that they got it wrong on the plan before that's why they wanted me to sign variation to allow the reduced slab height to occur. But, I did a bit of research and found that 300mm is suitable for M slabs, too. I will try to make them stay with the thicker pods.
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