How To Stop Spacers Breaking Your Waffle Pod Concrete Slab

Engineering design indicates that slab reinforcing mesh be positioned in a way so that a specified amount of concrete cover be achieved.

Incorrect concrete cover can cause a variety of issues including severe concrete cracking and structural problems.

That’s something which any construction veteran will know must be avoided.

Using Waffle Pods In Construction

The Waffle Raft (Pod) System is widely used in the residential building industry as a more cost-efficient way to lay concrete slabs.

Driven by pricing pressures, many pod producers have eroded the original design of the pod with material content decreased by as much as 20%.

“The National Construction Code (NCC) 2019, requires that suppliers deem products supplied fit for purpose and provide documentary evidence.”

Because of this change in the construction process, some of these “slimmer” pods are deficient in terms of their structural integrity.

Nurail steel mesh spacers

When the concrete is moved into position, the standard conical mesh chairs often push through the top of the pod, leaving the slab mesh laying flat on the top.

This in turn means that the resulting structure is non-compliant, with the evidence of the issue hidden, once concrete is poured.

Using The NuRail40-55 Spacer

The NuRail40-55 is a multi-height beam type spacer that enables the builder to place their concrete slabs with confidence of achieving compliance with engineering specifications.

By placing two NuRail40-55 on each pod, loads applied on both the spacer and the pod are distributed evenly without pushing the spacer through the polystyrene.

Simply changing the type of spacer used enables builders to effectively compensate for the reduced strength of these slim waffle pods.


Modern waffle pods are prone to issues due to their physical properties which can undermine the integrity of the building simply by using the incorrect spacers during the build process.

Switching to the NuRail40-55 can eliminate these problems and allow construction to continue while still maintaining a cost efficient workflow, and the integrity of the structure itself.

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