Does a waffle slab need a different reinforcement mesh to a raft slab?

The mesh grade and layout are genuinely specified per project rather than fixed by slab type — your engineer calculates reinforcement based on your building’s loads and soil classification, and a waffle slab’s ribbed structure often uses mesh differently to a raft slab’s flat, uniform profile.

What stays consistent across both is that the specification comes from real engineering calculation, not a generic default — worth confirming your contractor is supplying exactly what’s specified on your engineering drawings either way.

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