What Is Plinth | What Is Plinth Beam | What Is Plinth Protection | Purpose of the Plinth Beam in a Structure | Advantages & Disadvantages of Plinth Beam
Table of Contents
What Is Plinth?
In construction between the ground floor level and ground-level portion of the building is known as a plinth. It is generally constructed by stone masonry.
To support the superstructure, when the foundation is on piles the plinth is constructed. A 75mm thick damp proof course of plane cement concrete provides on the top of the plinth. To keep the floor free from dampness a plinth is constructed that’s the plinth to keep the ground floor up from the ground level.
To keep it up 150mm from the road level as governed by the requirement, the plinth is not constructed less than 450 mm from the ground level. For easy to make the underground drainage connection.
What Is Plinth Beam?
The plinth beam is a beam that is constructed to support the superstructure when the foundation is on piles. The building that is constructed between the ground floor level and ground-level portion of the building is known as the plinth beam.
The purpose of the construction of the plinth beam is it helps to transfer the live load and dead load that coming from the superstructure to the foundation.
In a building when the foundation is suffering from settlement and required to prevent the extension of cracks above the walls, then the plinth beam is constructed.
As governed by the requirement, the plinth beam is not constructed less than 450 mm from the ground level and keeps it up 150mm above the road level. To keep the floor free from dampness a plinth beam is a construct that’s the plinth beam keeps the ground floor up from the ground level.
What Is Plinth Protection?
The plinth protection is a 75mm thick damp proof course of plane cement concrete is provides on the top of the plinth. The plinth protection width is not less than one meter and it provides surrounding the building.
The plinth protection is provided to prevent dampness in the wall of the structure. The plinth protection is constructed to prevent the entry of water from the subsoil to the plinth wall.
To prevent the extension of cracks above the walls of the building the plinth protection is constructed. There are have been many materials as plinth protection like paver blocks, sand, gravel, etc. In the PCC the slope must be considered in the plinth protection.
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Preferred Strength of Concrete for the Construction of Plinth Beam
The preferred strength of concrete for the construction of the plinth beam should not be less than 20 MPa. If the concrete for the construction of the plinth beam is manually mixed then 20% additional cement should be added to the mixture.
Plinth Beam Minimum Dimension
In the plinth beam, the minimum depth for the plinth beam should not be less than 20cm. The width of the plinth beam should be equal to the width of the foundation of the structure and the minimum size of the plinth beam should not be less than 250 X 250 mm.
Concrete Strength Suitable for Plinth Beam Construction
Concrete strength suitable for plinth beam construction of M20 grade of concrete should not be less than 20 MPa. If the concrete for the construction of the plinth beam is manually mixed then 20% additional cement should be added to the mixture.
Formwork for Plinth Beam
Before placing the concrete adequately secured and the plinth beam should be installed appropriately the formwork is used for construction. Formwork for plinth beam, concrete is required to be compacted adequately, to preventing steel bars from corrosion.
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Purpose of the Plinth Beam in a Structure
There have many important purposes of plinth beams in a structure.
- The most important purpose of the plinth beam is, to evenly distribute the load that’s coming from the superstructure to the subsoil the plinth beam is constructed in a structure.
- The next purpose of the plinth beam is to construct to prevent the entry of moisture in the wall so the walls are free from dampness.
- In a building when the foundation is suffering from settlement and required to prevent the extension of cracks above the walls, then the plinth beam is constructed this is another purpose of the plinth beam.
- Where the load-bearing walls have to be provided, there the plinth beam is compulsory to construct.
- The common purpose of the plinth beam is, to keep it up 150mm from the road level as governed by the requirement, the plinth is not constructed less than 450 mm from the ground level.
- For the masonry construction over it, the plinth beam is provided for the bearing surface.
- The purpose of the plinth beam is to keep the column and beam connected and avoid the chance of buckling the column.
Application of Plinth Beam:
There are have been much application of plinth beam in the construction, that’s are below-
- The plinth beam is applied to a structure to prevent earthquake damages on the superstructure and foundation.
- The plinth beam is applied to the structure to provides a bearing surface over it for the masonry contracture.
- Where the load-bearing walls have to be provided, there the plinth beam is compulsorily applied.
- The most important application of the plinth beam is, to evenly distribute the load that’s coming from the superstructure to the subsoil the plinth beam is constructed in a structure.
- Another application of the plinth beam is, to keep the floor free from dampness a plinth beam is constructed that’s the plinth beam keeps the ground floor up from the ground level.
- The plinth beam is applied, when the foundation is suffering from settlement and required to prevent the extension of cracks above the walls.
Advantages of Plinth Beam
There have been many advantages of plinth beam in a structure that’s are below–
- The most important advantage of the plinth beam is, to evenly distribute the load that’s coming from the superstructure to the subsoil the plinth beam is constructed in a structure.
- Another advantage of the plinth beam is it is constructed to prevent the entry of moisture into the wall so the walls are free from dampness.
- In a building when the foundation is suffering from settlement and required to prevent the extension of cracks above the walls, then the plinth beam is constructed this is another advantage of the plinth beam.
- The common advantage of the plinth beam is, to keep it up 150mm from the road level as governed by the requirement, the plinth is not constructed less than 450 mm from the ground level.
- For the masonry construction over it, the plinth beam provides a bearing surface.
- The advantage of the plinth beam is to keep the column and beam connected and avoid the chance of buckling the column.
- The plinth beam help withstands lateral load during the earthquake such as seismic load.
- The unequal differential settlement should be prevented by the plinth beam of the foundation.
Disadvantages of Plinth Beam
As an alike advantage, there have many disadvantages of plinth beam that’s are below-
- The common disadvantage of the plinth beam is, it increases the total load of the building.
- The next disadvantage of the plinth beam is, it is not suitable for the economical structure because for this plinth beam extra concrete is needed. So the construction cost increases.
- To construct a plinth beam on the structure specialist mason is required, this is another disadvantage of the plinth beam.
- The disadvantage of the plinth beam is, it is not constructed below the M20 grade of concrete.
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What Is Plinth?
Plinth beam is a reinforced concrete beam constructed between the wall and its foundation. Plinth beams distributes the load of the wall over the foundation evenly.
What Is Plinth Beam?
Plinth beam is a reinforced concrete beam constructed between the wall and its foundation. Plinth beam is provided to prevent the extension or propagation of cracks from the foundation into the wall above when the foundation suffers from settlement.
What Is Plinth Protection?
Plinth protection reduces direct water from entering into the soil close to the plinth wall. In other words, the area surrounding the building is usually known as plinth protection. Plinth protection usually is done by pouring an approximate 75 – 100 mm layer of plain cement concrete along the edge of the building.
Purpose of the Plinth Beam in a Structure
Plinth beam is a reinforced concrete beam constructed between the wall and its foundation. Plinth beam is provided to prevent the extension or propagation of cracks from the foundation into the wall above when the foundation suffers from settlement.
Application of Plinth Beam
Plinth beam is a reinforced concrete beam constructed between the wall and its foundation. Plinth beam is provided to prevent the extension or propagation of cracks from the foundation into the wall above when the foundation suffers from settlement.
Preferred Strength of Concrete for the Construction of Plinth Beam
The strength of concrete used to cast the plinth beam should not be less than 20 MPA. If manual mixing is adopted, it is necessary to add 20% additional cement to the mixture.
Plinth Beam Minimum Dimension
A minimum depth of plinth beam is 20cm whereas its width should match the width of final course of the foundation.
Concrete Strength Suitable for Plinth Beam Construction
Strength of plinth beam concrete shall not be smaller than 20MPa. If concrete is mixed manually, then an extra of 20% cement need to be added to the mixture. Plinth beam concrete preparation placement.
Formwork for Plinth Beam
The formwork used for the construction of plinth beams must be installed and fastened properly before laying the concrete, as shown in below pic. The concrete needs to be compacted enough to avoid steel bars against aggressive elements.
Advantages of Plinth Beam
Plinth beam is provided to prevent the extension or propagation of cracks from the foundation into the wall above when the foundation suffers from settlement. Plinth beams distributes the load of the wall over the foundation evenly.
Disadvantages of Plinth Beam
The common disadvantage of the plinth beam is, it increases the total load of the building. The next disadvantage of the plinth beam is, it is not suitable for the economical structure because for this plinth beam extra concrete is needed. So the construction cost increases.
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