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What Is Plinth | What Is Plinth Protection | Purpose of Plinth Protection

What Is Plinth?

A plinth is a base or platform that supports a plinth, column, or structure. Structurally, the plinth distributes weight and pressure down evenly across a column across a wider space.

You can also elevate structures above the ground to protect them from water or other elements.

What Is Hight of Plinth?

The height of the plinth is between 300 – 450 mm from the ground level. It is recommended that a minimum baseboard height of 150 mm be adopted from a natural level.

Also, read: Brick Masonry | Types of Bricks | Types of Brick Masonry Work

Plinth Beam and Its Purpose in a Building?

The plinth beam is a reinforced concrete beam built between the wall and its foundation. The plinth beam is provided to prevent the extension or cracking of the foundation cracks in the wall above when the foundation suffers from laying.

Plinth beams evenly distribute the load from the wall over the foundation.

In a skeletal system, which is the other name for a framed structure, the plinth beam is the first beam to be built after the foundation.

How the ground floor finish level is maintained above ground level; the empty space and the void are filled with compacted soil, in order to obtain a stable surface for the floor to be built.

Also, read: What Is Contour Interval | Calculation of Contour Intervals | Uses of Contour Intervals in Surveying

Plinth Beam Applications

It is mandatory to provide a Purpose radius in areas prone to earthquakes.

The construction of the plinth board beam above the natural soil is another application of this type of beam.

Concrete Strength Suitable for Construction of Plinth Beam

The concrete strength of the plinth board beam must not be less than 20MPa.

If the concrete is mixed manually, it will be necessary to add an additional 20% of cement to the mixture.

Minimum Dimension of Plinth Beam

The minimum depth of the plinth beam is 20 cm, while its width must match the width of the final stroke of the foundation.

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.

Steel Bars Used for Plinth Beam

It is recommended to provide two bars with a minimum diameter of 12 mm at the bottom of the beam. Likewise, two bars with a minimum diameter of 10 mm must be provided at the top of the plinth beam.

The reinforcement bars must be protected by a 25 mm concrete cover. With regard to the stirrups, the diameter of the stirrup must be at least 6 mm, and the spacing of 15 cm must be sufficient.

What Is Plinth Protection?

The protection of the plinth is necessary to prevent/reduce the infiltration of water in the soil that reaches the plinth wall and reaches the floor level by capillary action.

The plinth beam protection reduces the direct entry of water into the ground near the plinth board wall.

In technical terms, the area around the building is generally known as plinth protection. The plinth protection is usually done by pouring a layer of approximately 100 mm of common cement concrete along the edge of the building.

The main idea behind this is to prevent water retention along the edge of the building, thus ensuring a long service life.

In most basic buildings, the protection of the plinth is usually left exposed for viewing.

However, in the case of well-finished buildings, the plinth beam protection can be covered with a layer of sidewalk blocks, gravel, or even the surrounding lawn.

The protection of the plinth is necessary to prevent/reduce the infiltration of water in the soil that reaches the plinth wall and reaches the floor level by capillary action.

The plinth board protection reduces the direct entry of water into the ground near the plinth board wall. In other words, the area around the building is generally known as plinth protection.

The plinth protection is usually done by pouring a layer of approximately 75 to 100 mm of common cement concrete along the edge of the building.

However, in the case of well-finished buildings, the plinth board protection can be covered with a layer of sidewalk blocks, gravel, or even the surrounding lawn.

Note: The plinth board protection is provided to prevent the extension or spread of cracks in the foundation on the wall above when the foundation is laid. If water is seeping into the ground.

Also, read: What Is Cinder Block | Cinder Block Properties | Shapes of Cinder Blocks |Advantages of Cinder

Purpose of Plinth Protection

The protection of the plinth is necessary to prevent/reduce the infiltration of water in the soil that reaches the plinth wall and reaches the floor level by capillary action.

The plinth board protection reduces the direct entry of water into the ground near the plinth beam wall.

The plinth beam in a frame structure is intended to join all columns, thereby reducing the effective length and thus reducing the slenderness of the columns.

Skirting beams are generally used in case the foundations are a little deeper and thus act as a reinforcement or mooring element.

One more reason to provide a plinth beam is to avoid differential settlement in a building, due to the reason that the entire load of the wall is carried by the skirting beam underneath.

Also, read: WPC Board | Features of WPC Board | Disadvantages of the WPC board | Usw of WPC

How Do You Make Plinth Protection?

The protection of the plinth is usually done by pouring a layer of approximately 100 mm of common cement concrete along the edge of the building.

The main idea behind this is to prevent water retention along the edge of the building, thus ensuring a longer life.

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Krunal Rajput: Hey, I am Krunal Rajput. The Man Behind CivilJungle. I started this site to spread knowledge about Civil/Mechanical/Electrical Engineering. I am a Degree Holder in Civil Engineering.