In general, lintels are not required over doors and window openings, up to four feet in width. This is because the actual load on the lintel is of the small triangle of masonry just above it. If required, two rows of bricks on edge are placed along the length of the opening, on either side. The space between the bricks is filled with R.C.C. of mix 1:2:4 and 6mm or 8mm dia. bars can be used.
This kind of lintel saves cement and steel and costs almost half the conventionally used R.C.C. lintels.