How to work out numbers of bricks in a brickwork

S.L. Khan, the renowned engineer, has presented another useful video for civil engineering students. In this video he focuses on the brickwork analysis method along with following topics :-

Estimation of number of bricks, Estimation of volume of mortar and Estimation of cement & sand

Assume a brickwork that contains the following dimensions :-

Length = 30 feet
Height = 15 feet
The density of the wall = 9 inches

Now, if it is required to find out the quantity of bricks, cement and sand from the above mentioned brick wall assuming that the size of the brick is 9 x 4.5 x 3 inches and mortar is 25% of brick wall.

Now total brickwork is equal to volume of brick wall. The volume of brickwork is defined as Length x height x thickness of the wall. After putting the value, we get the following :-

30 x 15 x 0.75 (as 9 inches = 0.75 feet) = 337.5 cft

Now, you have to determine the volume of mortar as follow :-

25%/100 x 337.5 = 84.375 cft

Now to find out the net brick work, it is required to subtract the volume of mortar from total brick work i.e. 337.5 – 84.375 = 253.125 cft.

To find out no. of bricks, the following formula will be applied :-

Net brick work/volume of one brick = 253.125/0.75 x 0.375 x 0.25 = 3600 numbers (after converting the brick size of 9 x 4.5 x 3 inches into feet)

To find the quantities of mortar as well as cement and sand, watch the following video tutorial.

Video Source: SL Khan