How Do You Calculate a Lintel

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. In a house, the level of lintel is generally the soffit level of a door or window.

How do you size a lintel?

1. Measure the size of the structural opening i.e. the clear span between the masonry supports.
2. Add 150mm minimum bearing to each end.

How is lintel depth calculated?

1. Take effective depth of lintel, d = l/10; [IS:456-2000, Cl.23.2.1]
2. Overall depth D = Effective depth (d) + Effective cover.
3. Width of the lintel, B = Thickness of the masonry wall.