Raft slabs in Australia are designed to comply with Australian standard AS287. A raft slab is reinforced concrete slab that is strengthened with integral concrete beams in both directions. The steel reinforced raft slab is also commonly called an engineered slab. It consists of thick steel reinforced concrete slab integrated with steel reinforced concrete beams founded into the bearing soil for strength and support. Usually used as the foundation for new houses and extensions.
