![]() Grade of concrete used is M20 and for steel Fe 500 is used. Design aid SP-16 is used for calculation. The difference is there in the diameter taken for reinforcements as in case of beam large diameters are used while in case of lintels small diameters are used.Ī clear cover of 25 mm is taken for lintels which is same as the clear covers for beams. The design calculation of lintel is similar to beam design calculations. Here an example is shown to calculate the reinforcements and other design aspects of lintel. The height of the door jam, which is not fastened or secured, is the lintel level. For residential purpose, its height is kept 2.1 meters or 7 feet. In a house, the level of lintel is generally the soffit level of a door or window. Also, the length of lintel in case of masonry wall is calculated by taking the measurement of the total width of the opening and adding 150 mm for end-bearings at each end. Moreover, these must be supported sufficiently at each end. The minimum breadth of the lintel must be 80 mm. The breadth of the lintel should be equal to the thickness of openings& depth should be in the range of l/12 to l/8 of the span. These can also be prestressed for better load carrying capacity. These can be made of wood or concrete however, concrete is widely used due to its strength and durability. These are used for load bearing purposes, to transfer its load to the side walls and sometimes for decorative purposes. to support the top load falling on these openings. A lintel is a horizontal structural member that is present on top of doors, windows, etc. Before coming to the design part, it is important to know the importance of lintels in structure. ![]()
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