Sure, each and every one of us know that foundation plays a critical role in the construction. Walls and Dreams Every building or structure requires a firm foundation to offer needed support to stand firmly. Without this, it [the entire structure] will all come crashing down. Cantilever footings are a common type of construction that is used in order to create a footed structure that will not fail to offer competent support to the construction. In this last segment of the topic, let us take a closer look at cantilever footing and learn of its development, merits, and uses.
What is Cantilever Footing?
Cantilever footing also called strap footing is one of the footings where the projecting part is extended beyond the supported structure for better sharing of loads. It plays an important role in construction of buildings as it gives support and has a enduring property. This type of footing aids to distribute the building load and especially to support it against any form of settlement or downward direction as a result of weak foundation.
Why is Footing Important?
Footings are crucial in the complete understanding of how a building will be established because they support and connect one or more columns in the building. They assist in transferring the load of the particular building from the outer part to the internal side. This is because it would place excessive pressure at some parts of the building hence compromising the ability of the building to sustain that load. The strap beam within cantilever footing plays a role in transferring this weight on the soil and so the structure remains stable.
Types of Cantilever Footing
There are two primary types of cantilever footings commonly used in the construction industry:
Uniform Strap Cantilever Footing
Uniform strap cantilever footing It is a type of footing which is used for uniform load bearing structures with single Reinforcement Bar where loads are transmitted to the soil at one end and the Reinforcement Bar is extended beyond the brick work on one side.
This type bonds two columns via a rigid strap beam such that stress is consistently spread throughout the structure. It is employed in the circumstances when two columns are arranged in close proximity, and equal stress-bearing capacity is needed to ensure stability.
Non-uniform Strap Cantilever Footing
Our non-uniform strap cantilever footing is designed to stand at an angle, while the weight of the structure is evenly distributed throughout the footing.
Non-uniform strap cantilever footing is used in these span constructions where the load requirements differ. These can include the design property applied to the beams where either the size or thickness differs to enable it to accommodate different loads in different manners.
Design Considerations of Cantilever Footing
When designing a cantilever footing, several factors need to be considered:
Soil investigation: To that extent, it seems useful to understand the load-bearing capacity of the soil.
Footing dimensions: Superstructures should be founded considering size and the load that is expected to be put on the building.
Eccentricity: Forbidding tipping or shifting the load in a way that will make the car tip over.
Minimum depth: Footings should be placed at a certain depth depending on the type of soil, type (sloping or level) or below the ground surface 50 cm, below ground surface 90 cm.
The cantilever footing plays the role of a flexible structure where loads from other portions of the building are transferred to internal supports. As expressly designed to take bending moments and shear forces, these beams make certain that imbalanced loads are even.
Advantages of Cantilever Footing
The key benefits of using cantilever footing include:
Has been described as needing little land hence suitable for being used for urban purposes.
- Is ideal especially when the ground is poor as it offers a great support.
- Used where it spreads loads over large spaced columns uniformly.
- Prevents the walls that have been built for quite some time to set and remain firm.
- There are also several limitations of Cantilever Footing which includes the underlisted;
Disadvantages of Cantilever Footing
- Design of cantilever footing involves a number of considerations and entails a fair amount of professional know-how.
- The construction process is somehow challenging as compared to the conventional footing construction methods.
- More cost is incurred due to the increased design and the material needed to incorporate the design.
- Measures for protection of the workers require additional concern in the construction phase.
When is Cantilever Footing Used?
Cantilever footings are applied where the area of the ground at the desired location for founding is constrained or where the soil is incapable of bearing the loading directly. Such solutions are also useful in those situations when columns are placed close to plot boundaries and cannot be extended to them. Besides, they are applied when the distance between the columns is vast, and footings should link them up and distribute loads equally.
Should the combined footings not offer the necessary support strap footing enhances the bearing capacity of the soil for structural support.
FAQs About Cantilever Footing
What are the reasons that cantilever footing is used?
The primary role of cantilever footing is to bear the structure of the floor and to halt further sinking.
What is another name for cantilever footing Correct call it also as an overhanging footing.
In some quarters, cantilever footing is referred to as strap footing.
