Raft Foundations Design Details & Construction Explained Raft foundations, which are sometimes referred to as mat foundations, are formed by reinforced concrete slabs of uniform thickness, usually 150 to 300 mm) that often cover a wide area, often the entire footprint of a structure. Raft foundation spread the load imposed by several columns or walls over the foundation area and can be seen to ‘float’ on the ground as a raft floats on water. Raft Foundations are […]