What is purpose of lintel and sill level in building construction?

Lintel level and sill levels are parts of the wall.

Lintel Level

When a window or door is constructed, a load of bricks above it needs a base. And lintels are provided for the same. Above the window, a beam-like structure mostly made up of concrete (Structural wall) is constructed. the length of this beam can limit to slightly more than the length of the window or it can exceed to cover the whole wall and can act as a lintel beam. the height where the lintel beam is constructed is called lintel level

Sill level

The sill level are similar to the lintel level but it is constructed below the window and its length is the same as the length of the window only. the height at which this sill is constructed is called the sill level.

Basically sill is known as the horizontal bed of the mortar which is usually as wide as the wall provided below windows or other openings. Therefore sill supports the windows.

And lintel is made up of reinforced concrete or cement mortar .Therefore lintel support the wall above the openings.

Window sill level

The level which is exactly below the window frame it is a horizontal shelf at the bottom of the window frame. It protects the junction of the window and provides additional support and stability for the window. Having level around 0.6m to 0.9m from floor level. variety of window sill materials available.

Lintel level:

This is the just above the window and door frame to take load coming from wall which is above the window and door frame. It may be of concrete, wooden, R.C.C., stone, etc. The level of lintel is around 2.1m to 2.3m.

Sill is a horizontal bed of mortar usually as wide as the wall provided below windows or other openings. Sill supports the windows.

Lintel is a structural RCC beam spanning throughout the length of the building or above the openings alone. Lintel supports the wall above the openings.

Eg. The window starts from the sill below it and ends with the lintel above it. (Upwards)

To know more about lintel,

https://theconstructor.org/building/lintel-types-uses/11420/26

Purpose of lintel

• Act as a tie beam.
• To transfer load of above massonary of  window frame to the surrounding massonary.
• To provide confinement of structure.
• To support chhajja.
• Act as a DCP.

Purpose of sill level

• To provide support of windows frame
• To provide smooth bottom surface to the window.
• Sometime stand provide near to windows that time sill support stand.
• Prevent water penitration.