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Lagos, Amuwo-Odofin
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Raft And Mat Foundations Waterproofing
Brand New
Condition
Other
Brand
Gutters
Type
Acrylic
Material
Store address
Lagos State • Lagos Island (Eko)
festac second gate via agboju bus stop, branch office,41 apex avenue besides apex school, AIT road,
09:00-18:00
RAFT or MAT FOUNDATIONS
A raft foundation, also called a mat foundation, is essentially a continuous slab resting on the soil that extends over the entire footprint of the building, thereby supporting the building and transferring its weight to the ground.
A raft foundation is often used when the soil is weak, as it distributes the weight of the building over the entire area of the building, and not over smaller zones (like individual footings) or at individual points (like pile foundations). This reduces the stress on the soil.
The concept of stress is very basic to civil engineering. Stress is simply weight divided by area. For example, if a building measuring 5 x 5 weighs 50 tons, and has a raft foundation, then the stress on the soil is weight / area = 50/25 = 2 tons per square meter.
If the same building were supported by say 4 individual footings, each of 1 x 1m, then the total area of the foundation would be 4 m2, and the stress on the soil would be 50/16
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