Biax Foundations:

Created by Vicki Marshall, Modified on Mon, 7 Nov, 2022 at 12:37 PM by Vicki Marshall


Region: All States


Assessor Question:


I have a client who is looking at using Biax Foundations instead of waffle pods.  Could I please have some advice as to how these slabs should be modelled in Firstrate5?

TechLink Response:

  • Waffle pod slabs can be constructed with a variety of void formers.
  • They range from solid EPS to hollow EPS to cardboard and in this case to polymer domes.
  • NatHERS Technical Note does not define the precise void former technology assumed for selection of waffle pod slab construction.
  • Accordingly for BAIX formers it is reasonable to select Waffle Pod slab on ground.
  • Due to the dome shape the best match option will be a 100mm concrete slab and total slab depth to suit the particular project structural design

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