Lintels and Their Types
A lintel is a level auxiliary member that is given over the openings, for example, windows, doors, and so forth., in a structure.
Lintel is additionally used to support projections like awnings and lofts. The width of the lintel is commonly same as that of the divider. In this article, various types of lintels and their uses are examined.
Properties of a Lintel:
1. It should deal with the load from the stone work over the openings.
2. A Lintel is a significant flexural member that must be planned so that it can oppose the pressure, pressure and shear following up on it.
3. The lintel ought to likewise counterattack diversion.
Types of Lintels: Lintels can be grouped dependent on two standards – span and materials.
Classification Based on Span
a. Lintel beam or Cut lintel
b. Lintel band or Continuous lintel
Lintel Beam or Cut Lintel: In this type, the lintel beam is given distinctly over the openings. These lintel beams can be precast or projected set up. Direction are given to ensure the load is moved appropriately to the casings of the doors and windows. These types of lintels are well known in load bearing structures.
Lintel Band or Continuous Lintel: This lintel runs all through the span of the structure. It resembles another rafter associating all the sections of the structure. It is generally comprised of reinforced cement concrete. These types of lintels are appropriate in Surrounded structures, Structures with sweeping soils, Territories inclined to tremors etc.
Classification Based on Materials: As indicated by the type of material utilized for development, lintels can be ordered into the below mentioned types:
1. Timber lintels.
2. Flitched lintels
3. Stone lintels
4. Brick lintels
5. Steel lintels
6. Plain cement concrete lintels
7. RCC lintels
Timber Lintel: Timber lintels are made of normal wood primarily Redwood. This is perhaps the most established type of lintels to have been built by man. A very much prepared wood that is hard and sound must be utilized for development. The profundity of the lintel is generally 1/twelfth of the span of the lintel. A solitary board of wood might be utilized or at least two portions of wood might be combined with the assistance of jolts and be utilized as a developed framework.
Flitched Lintel: Flitched lintels are altered timber lintels. In the event that steel plates are given at the top and base of the timber lintels, at that point it goes about as a composite structure – the flitched lintel.
Stone Lintel: Stone lintels are made of stones of tallness in any event 15 cm. Generally, a solitary stone is wanted to evade powerless regions, for example, joints in the stones.
Brick Lintel: Brick lintels are comprised of fully burnt bricks. The stature of the lintel ranges from 10 cm to 20 cm relying upon the span and the loading.
Steel Lintel: Steel lintels are made utilizing pre-assembled GI sheets, moved I segments or point areas. On the off chance that more than one area is utilized, a line separator might be utilized to keep up the base separation between the areas.
What's more, the steel segments might be implanted into the concrete to expand the protection from fire and other natural conditions like erosion. Else, the steel segments ought to be painted with hostile to destructive paints.
Plain Cement Concrete Lintel: The plain cement concrete lintels are comparative in conduct to the stone lintels. They are awesome in pressure however powerless in strain.
Reinforced Cement Concrete (RCC) Lintel: The reinforced lintels have steel bars gave inside the concrete on the base to deal with the strain. Adequate spread is given to forestall the rusting of the reinforcements. Shear reinforcements can likewise be given to deal with the shear powers. These are of three types:
1. Cut lintel: It is a lintel beam spanning just over the openings. Generally, a precast lintel beam is utilized. It is regular in load bearing structures.
2. Band lintel: It is utilized in confined structures as a rafter interfacing all the sections in a structure. It spans over the length of the structure like a normal beam however over the openings.
3. Lintel with projections: This type of lintel is utilized to support the coverings and lofts.