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Stiffened raft slab

The stiffened raft slab is the simplest and most common slab con­struction. The stiffened raft configuration can be used on all classes of sites (except problem sites - Class P).

Photo of a concrete slab on the ground.
Concrete slab on the ground
Diagram of a section showing the stiffened raft design. The diagram shows the beam depth and spacing, the slab thickness (300 mm) and mesh, the bedding sand and vapour barrier.
Section showing stiffened raft design















Refer to Figure 3.2.5.3 (b) of the Building Code of Australia.