What is Plinth Beam?

What is Plinth Beam?

Plinth beams are built between the foundation and the walls and are reinforced concrete beams, these beams are provided when the foundation has difficulty sitting to prevent expansion or spreading of cracks in the wall from foundation to foundation but these beams distribute the load of the wall.

Purpose of Providing Plinth Beam

The following are the reasons for providing plinth beam,

• These poles in the buildings prevent separate placement and all loads in the plinth holes are transferred evenly due to the foundation.
• These poles prevent moisture from entering the building from the foundation.
• These beams fasten all the pillars.
• This prevents the building from collapsing during the earthquake.
• These rays distribute the load evenly.

Plinth Beam Applications

The following are the applications of the plinth Beam,

• In accordance with the standards, it has made it compulsory for earthquake-prone areas to build a Beam plinth.
• It works to build a plinth fence Above Earth Level.
• Plinth Beam carries the load of a wall built on top of it.
• Water from above is prevented from being deposited in the soil using the Plinth Beam.
• The best way to use the plinth is to withstand external actions such as water, tree roots, termites that can affect the life of the frame.

What is plinth Protection?

• Plinth protection is provided to prevent water contact from the ground and to achieve the plinth wall and floor by capillary action leading to moisture, which acts as a barrier and water in the ground near the plinth wall prevents direct access.
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• Plinth protection is supported by providing additional shape or additional thickness / height under the beam or under the base. In short, a plinth is the foundation of a building that carries the weight of a building on the ground.
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• Most of the time, the plinth has to deal with external actions such as water, tree roots, termites as it affects the life of the plinth and fails.

The purpose of Plinth Protection

• Plinth protection is needed to prevent leaking water on the ground.
• Protecting the Plinth prevents water from entering the soil directly near the plinth wall, this is usually done by placing a plain precast slab 600 mm wide.
• The purpose of the frame structure is to connect the plinth to the whole column, reducing the working size and volume of the columns.
• Welded beams commonly used on foundations are slightly deeper, serving as a reinforcing or binding material.
• Another reason to provide plinth beam is to avoid separate living spaces in the building, because the entire wall weight is less than the skirting beam.
• Fringed beams are often used when the base is slightly deeper and thus serves as a reinforcing or binding material.

Work form and metal bars used in Plinth

• Two Strengthening Steel Bars 12mm wide are required to be provided under the frame.
• However, on top, 10mm wide steel bars are recommended for plinth beams.
• Along with bars 12mm wide and steel bars 10mm wide, it is mandatory to provide a 25mm concrete cover for protection.
• 15 cm space and 6mm wide stirrup are recommended according to the standards.
• Forms are installed before filling the concrete in sufficient manner to ensure and obtain the required strength of the concrete.
• Another important factor in obtaining the required strength is bonding concrete.
• Concrete mixing eliminates the empty balance between the concrete after laying.

Standard size of Plinth Beam

• The diameter of the beam is usually 9 ″ or 225mm, as the wall width in India is 9 ″. For the building to look good.
• The minimum size of the RCC plinth beam should not be less than 9 "x 9" (225 mm x 225 mm), as is the sixth standard rule.
• The plinth size of a 1-storey building building is 9 “x 9” (225 mm x 225) mm) and 9 ″ x 12 ″ (225 mm x 300 mm) plinth sizes are used for 2 story ( G + 1), 3 news houses (G + 2) and 4 stories (G + 3).

Concrete for Plinth

• 20Mpa Minimum Power Required on Plinth to withstand External Actions.
• Manual concrete mixing requires 20% additional cement to add to the mixture, to compensate for the loss.
• Proper installation is mandatory in the case of Formwork before filling the concrete.
•  The strength of the plinth depends well on the adequacy of the protective formwork while filling the concrete.
•  Concrete mixing is also one of the factors involved in obtaining sufficient strength.