In this article, we will discuss continuous footing and its types.
Continuous footing is a type of shallow foundation that resists the load coming from more than 2 columns and spread it to a wider area as it enters the ground. It is also known as strip footing.
They are generally used where the soil has low bearing capacity.
The load occurred in the column will be transferred to the footing or longitudinal beam which is placed over the footing slab.
The shape of the footing is rectangular.
It is generally used if the columns in rows are closer.
2. Types of Continuous Footing
a. Simple footing
It is a simple form of footing that is used for small-scale structures. The uses of reinforcement and the wastage are in a controlled form.
b. Stepped footing
A footing that is designed with a secured width with a series of steps where the soil has an uneven surface. More than 2 concrete steps are placed over the footing at a certain level of offsets.
It is mostly used in places where a certain level of the slope is along or across or on both the site of building exist.
The objective of this footing is to get rid of horizontal force vector that may cause sliding
3. Uses of Continuous footing
The continuous footing is used when;
I. The load-bearing capacity of soil is low.
II. The columns are close to each other that their individual footing will overlap.
4. Advantages of Continuous footing
a. Provides a stable base.
b. Evenly supports the weight of the foundation walls.
c. Installed under the edges or the perimeter of the building.
d. Consist of steel-reinforced concrete to support the structure.
e. Anchors buildings.
5. Disadvantages of Strip Footing/Continous footing
a. Not suitable for horizontally unstable grounds.
b. Waterproofing is required.
c. Needs a large amount of earthwork.
|Read More: Overhanging Beams|
|Read More: Types of Beams|
Civil Engineer & CEO of Naba Buddha Group