According to aci committee 336 mat foundation is continuous footing that supports several rows of columns in either direction covering at least 3 4th of total assembly area of columns outer parameter having shape like slab with without opening or.
Define mat or raft.
Mat definition a piece of fabric made of plaited or woven rushes straw hemp or similar fiber or of some other pliant material as rubber used as a protective covering on a floor or other surface to wipe the shoes on etc.
A raft or mat foundation consists of a large concrete slab or a slab and beam system resting on soil or rock and supporting all the loads through a number of columns or walls.
An inflatable rubber raft.
Raft foundation is also known as mat foundation.
Raft definition a more or less rigid floating platform made of buoyant material or materials.
This is tutorial no 3 of raft mat foundation design course this includes adding mat in the cad imported area.
When the raft foundation is supported on piles it is called a piled raft.