Waffle pod beams on a Beveridge slab
The beams between the pods carry the house. Pods that move narrow them.
Most Beveridge slabs are waffle pod slabs, and the pre-pour check is about the beams between the pods as much as the steel inside them.
One of our inspectors will call you back. If it is urgent, call 1300 471 805.
On Beveridge slabs we have recorded internal beams pinched by a waffle pod below the 110mm width required, pods moved so the middle beams were uneven, and beam widths changing along their length. Each one changes how the slab carries the house.
Annotated findings from Slab pre-pour inspections.
1Bored piersOnce the holes are bored and cages set, before any concrete
3FrameFrame standing and trusses on, before wrap and sarking
4Lock-up (pre-plaster)Roof, windows and external doors in, before insulation and plaster
5FixingCabinetry, doors and trims fitted, painters not yet started
6WaterproofingMembrane on and cured, tiles not yet laid
7Pre-handover (PCI)Roughly a week before the builder hands overThe beams between the pods carry the house. Pods that move narrow them.
Waste points cast in the wrong spot surface when the walls go up.
Where roof load lands decides whether walls and ceilings crack.
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A slab poured over a grid of polystyrene pods, leaving a pattern of concrete beams between them. The beams do the structural work, so their width and steel matter most.
It is the width the design assumes. A pod pushed into the beam leaves less concrete around the bar and less beam to carry the load.
Yes, easily, which is why we inspect before the pour. The builder realigns the pods and resets spacers.
Yes. It must sit under the steel, run under the whole slab and be taped at every pipe penetration and puncture.
AS 2870, AS 3600 for concrete cover and the engineering for your lot, alongside the NCC Housing Provisions.
Only the edge. Everything inside the slab is permanent once concrete is placed.