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Slab recesses

Recesses cast into the slabs allow for easier access for maintenance than trying to locate pipes under a slab.

Diagram of a concrete slab with a shallow recess (thickness no more than 50 mm).

Diagram of a concrete slab with a deep recess (thickness of 51 - 200 mm). The minimum slab thickness is 125 mm. The recess is inset 400 mm from either side of the thickest part of the slab.