What is a Lintel?
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A lintel is a horizontal member placed over a door, window or other opening in a wall to carry the load of the wall above it and transfer that load to the walls on either side. Without it, the masonry above an opening would have nothing to rest on and would crack or collapse.
Why a lintel is needed
An opening interrupts the wall. The bricks or blocks above the opening still carry the weight of the wall (and sometimes the slab) above them. The lintel spans the gap, picks up that load, and delivers it to the solid masonry — the bearing — on each side. A typical bearing length is around 150–200 mm each side.
Types of lintel
- RCC lintel — the common modern choice: a small reinforced-concrete beam cast over the opening, strong and durable.
- Precast RCC lintel — cast separately and lifted into place.
- Brick / stone lintel — traditional, for small openings and light loads.
- Steel lintel — steel sections for wide openings or heavy loads.
Lintel and chhajja (sunshade)
Over external openings, the RCC lintel is often cast together with a chhajja — the projecting sunshade/weather-shade that throws rain and sun off the window. The chhajja is a small cantilever, so its main steel sits at the top.
Lintel vs beam
A lintel is really a small beam, but the words are used differently: a beam is a primary structural member spanning between columns and carrying slabs; a lintel specifically spans an opening in a wall and carries the masonry above it.
Frequently asked questions
What is a lintel in construction? A horizontal member over an opening (door or window) that carries the wall load above and transfers it to the walls on each side.
Why is a lintel provided over a door or window? Because the masonry above the opening still carries load; the lintel spans the gap and transfers that load to the solid wall on either side, preventing cracking.
What is the difference between a lintel and a beam? Both bend under load, but a beam is a primary member spanning between columns, while a lintel specifically spans a wall opening and carries the masonry above it.
What is the bearing of a lintel? The length by which the lintel rests on the wall at each end — typically about 150–200 mm — through which it transfers the load.
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Written and reviewed by practising civil engineers with 10+ years of Indian residential construction experience.