The Difference between Plinth Level, Sill Level, and Lintel Level and Its uses

Types of Levels in the Building as BelowGround Leval / Floor Level

What Is Floor Level?

Ground Level is the full name of G.L. Floor Level is the full name of F.L. The term 'Ground Floor' or 'Ground Level' refers to the street/ground level of a building.



The term "story" is commonly used to refer to all building levels above the Ground Level / Floor Level. It can also refer to the area of land that has not yet been developed.


The 'Natural Ground Level' is the ground level before any excavation or filling, whereas the 'Finished Ground Level' is when it has been 'Finished' with paving stones, asphalt, landscaped grass, and so on.

What Is Natural Ground Level?

(NGL)-Natural Ground Level is known by its full name.

The term "level of the ground" refers to the natural ground elevation.

Typically, the Mean-Sea-Level (MSL) is used to measure the height of the Natural Ground Level (NGL).

Mother Earth has provided us with a natural ground level, and an existing ground level may have been cut or filled, resulting in a different elevation from the original natural ground level.
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What Is Floor Finishing Level?

(F.F.L)-The floor Finishing Level is known by its full name. The Floor Finish level refers to the ground level inside the structure. This level is 150 and 450 millimeters above the natural ground level (N.G.L).

What Is Existing Ground Level?

E.G.L. complete name of the Existing ground level. This surface area is referred to as the current ground level after the natural ground level above the level surface has been filled with earth. E.G.L. typically follows soil compaction during filling.

What Is Plinth Level?

The portion of the superstructure known as the plinth is located between the top of the tie beam at the finished ground level or the top level of the soil surrounding the structure that has been prepared and leveled before construction ( the ground floor level inside the building).

The primary purpose of the plinth height is to shield the superstructure from moisture that might seep in due to direct ground contact. The damp proof course, which offers additional dampness protection, is provided on the top level of the plinth.

This area of the building is directly above the ground, between the floor's surface and the surface of the surrounding ground.

As per Byelaws, the plinth should not be less than 45cm. The basic requirements of the plinth area
  • serving as a retaining wall to prevent the filling portion from rising above the raised floor or building
  • To prevent dampness or moisture from entering the building
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What Is Sill Level?

The sill level refers to the area between a window's base and the floor above ground level. The concrete bed or mortar bed is positioned at the window base level. At the window's base, granite is also used. The sill height varies from room to room and depends on the style of the room.

The top of the window is where the lintel ends. A window sill may be the same width as the brickwork beneath it or broader.

The Sill level is the area between the bottom of the window and the floor above ground level (upward). At the bottom of the window, a bed of concrete or mortar is laid.

The room type for bedrooms and bathrooms determines the sill level's height.

What Is Lintel Level?

The height or vertical measurement from a window or door's bottom edge to its top horizontal component is known as the lintel level. Lintels are installed above windows and doors to transfer the upward wall load to the adjacent wall.

The Lintel level is the elevation between the top of the window and the top slab. Typically, cement mortar or reinforced concrete is used to construct the lintel.

It is necessary to introduce a different structural element because the door or window's actual frame is insufficiently sturdy to support the weight of the wall above the openings. A lintel is what this is called.
 This lintel area level also is known as the lintel level.

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Difference Between Plinth Level, Sill Level, and Lintel Level.

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Plinth Level Meaning

The plinth level is located at A-Level, where the superstructure begins, and the substructure ends. The plinth is a superstructure component situated between the ground level and the finished floor level. The plinth aids in shifting the weight of the superstructure to the foundation.


Plinth Level

The plinth level is the height of a building's ground floor relative to the adjacent ground. The plinth level refers to the height of a building's first floor. The plinth level is the height of a building's ground floor above the surrounding ground.


Lintel Height

Lintel height is the distance from the floor level to the level of the lintel. According to building codes, the preferred lintel height for residential buildings is 7′ (2.1 m), while it is 7'6′′ for commercial buildings (2.3 m).


Sill Level Meaning

The Sill level is the height between the window's base and the part of the floor above ground level (upwards). At the bottom of the window, a bed of concrete or mortar is laid.


Plinth Level Height

It is a portion of the superstructure between the natural ground level and the finished floor level. The plinth stops rain and stormwater from seeping into the building. The plinth rises 300 to 450 millimeters above the ground.


Window Sill Height

The Sill level is the elevation or separation between the floor and the bottom of the window frame. It is typically maintained at 900 mm, or 3 feet. The Lintel level is the space between the floor and the top of the door frame where the lintel is installed.


What Is Ground Level?

The building level at ground/street level is referred to as the "ground level" or "ground floor." In this context, a building's levels above the ground are typically called stories. It may also be used to describe the level of undeveloped land.


Lintel and Sill

A structural horizontal block is known as a lintel or lintel that spans the opening or space between two vertical supports. Instead of being called a lintel, the bottom span in a window is referred to as a sill because it does not support a load to maintain the wall's strength.


What is Plinth Level?

The Plinth level is the point at which the Substructure ceases, and the Superstructure begins. It is a portion of the superstructure between the natural ground level and the finished floor level. The plinth stops rain and stormwater from seeping into the building.


Sill Level Height

Skill level is the height or distance between the bottom of the window frame and the ground. Typically, this height is maintained at about 900 mm (3 feet) above the ground. Lintel height is the height or distance from the top of the door frame to the floor level. It is typically maintained at 2.1 meters (7 feet) above the floor.


What Is Sill Level?

It is the distance from the floor of the building to the base of the window, measured upward. Or. The sill level refers to the area between a window's base and the floor above ground level. The concrete bed or mortar bed is positioned at the window base level.


Floor Finishing Level

The uppermost surface of a floor after construction is finished but before any finishes have been applied is referred to as the finished floor level (FFL). It is customary to express floor levels and other vertical dimensions in meters with three decimal places, for example, FFL 16,550.


Lintel Level of a House

The height or vertical measurement from a window or door's bottom edge to its top horizontal component is known as the lintel level. Lintels are installed above windows and doors to transfer the upward wall load to the adjacent wall.


Plinth in Building

A house's foundation is a plinth level. It is a rectangular stone block on which a building's column and pillar are supported. It is a barrier separating the ground level from the ground floor. The primary purpose of a plinth in a building is to evenly distribute the weight of the columns over the foundation.


A plinth of a Building

A house's foundation is a plinth level. It is a rectangular stone block on which a building's column and pillar are supported. It is a barrier separating the ground level from the ground floor. The primary purpose of a plinth in a building is to evenly distribute the weight of the columns over the foundation.

Civil Engineering Information

The creator Azib Rajput , is a civil engineer living in islamabad>> Punjab>> Pakistan . He has completed his DAE civil from CTTI. This site was made for educational purpose so as to help the fellow civil engineering students and to spread the knowledge about the latest civil engineering projects and softwares. This site consists of general notes of all engineering fields which are specifically taken from my class notes by considering various books and journals.

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