When the depth of beam exceeds 90 cm in simple beam and slab mat a rigid frame mat is referred.
Mat slab vs structural slab.
In such design basement walls act as ribs or deep beam.
This video compares and contrasts the differences between 3 floor types.
The main difference will probably be in the reinforcement.
When footing is provided to support an individual column it is called isolated footing.
These slabs will contain steel reinforcing rebar or post tensioning tendons.
Mat foundations are constructed on various occasions such as building construction bridge construction tower construction etc.
Mat foundations are intended to support heavy column loads and are intended to throw the loads lower into the soil profile but at lower stress levels because of the large area.
A structurally reinforced slab on ground uses a composite of concrete and structural steel to support the design load structural steel may be rebar or wwf.
Slab on grade is supposed to carry its own weight and the live load.
In a structural concrete slab the thickness of the slab is not a factor in.
The shape may be rectangular round or irregular and the thickness may vary.
The steel provides.
Mat footing on the other hand is supposed to take the vertical load.
Sometimes it is stepped to spread the load over a larger area.
Fig 4 shows a typical rigid frame mat.
Structural slabs are typically elevated concrete slabs 2nd floor 3rd floor roof etc.
For the soil supported mat the soil is assumed to have a linear response which is defined with the subgrade modulus and is characterized by a set of springs which can vary in stiffness at points under the mat.
Slab on grade in general is a floor covering mainly for service purpose though it sometimes integrated with other structural components that carry structural loads.
And not being able to slope a variable thickness floor.
The mat or structural slab is modeled with linear finite elements.
They are typically unreinforced or lightly reinforced for crack control.
Slabs on grade are very lightly loaded.
Issues related to sloping of floors slabs varying the thickness of floors limits to sloping floors and the shortcoming of adding a slab edge to a sloped floor slab.
The mat foundation carries structural loads from structure above it is usually placed at below frost depth.
In this mat pedestals are provided at the base of the columns.
It is circular square or rectangular slab of uniform thickness.
The cross sectional area of the steel is inserted into engineering formulae found in aci 318 to determine the load carrying capacity for a given slab design.