Estimating Sheet

# How to work out numbers of bricks in a brickwork

Construction Software 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 