In short: Waffle pod slabs carry a house on the concrete beams between the pods. At a Beveridge pre-pour, a pod had pushed into one, leaving it narrower than designed.
The beam, not the pod
In a waffle pod slab the polystyrene pods are formwork. The strength sits in the concrete ribs between them, each with its steel. At a Beveridge pre-pour inspection in August 2025 our inspector measured an internal beam obstructed by a pod and short of the 110mm width it needed.
Not a one-off
A few days later, on another Beveridge slab, the pods had to be realigned so the middle beams came out equal in size and spacing. The first slab also had beam widths changing along their length where spacers were never placed. Same cause each time: light pods drifting while steel goes in.
Why it is fixed on the day
Before concrete, the crew lifts and resets the pods, adds spacers and the beam is right. After concrete, the only path is an engineer assessing a slab that does not match its design, on clay over basalt that moves with the seasons.
What to ask for
Ask your builder for the pour date as soon as it is set, and book the pre-pour for the day before. Bring the engineering so beam widths and steel can be checked against it, not against memory.
Written by our local inspection team from work carried out in Beveridge. Licensed building practitioners, Building & Plumbing Commission registration CDB-U 53425.
