Calculate the quantity of Bricks for messionory work

First of all we should assume Mortar ratio {Cement + Sand (Thickness)}

• Suppose Mortar Ratio is  1:6   (cement=1, sand=6)

           mortar thickness = 10mm

• Constants 

          Density of Cement = 1440 Kg/m³

          1m³ = 35.3147 ft³

• Volume of Brick (Without Mortar) = 0.19 x 0.9 x 0.9     = 0.001359 m³
• Volume of Brick ( With Mortar)     = 0.20 x 0.10 x 0.10 = 0.002 m³

Now We have to determine the total volume of wall for brick work.

• Vol of wall = height * length * thickness 

To get actual volume of brick work. subtract the all window and door volume.

Then Total volume of Brick work / volume of brick (with mortar)

You will get accurate number of  brick required.

As for example

Suppose i am having a 20cm thick wall with some dimensions. And there are a gate and window is also available in design. Then we have to find the number of bricks required to built this wall.

We need  :-

1. Total volume of wall
2. Volume of door
3. Volume of window
4. Volume of brick work
5. Volume of brick
6. Number of brick =?

Let’s start and do all the calculation step wise.

STEP-1

 Total volume of a wall =   Length × Height × Width

                                  13 × 10 × 0.65617                     ∵20cm=0.65617ft

We change width unit in to feet

85.3021 cft/ft³

STEP-2

          Volume of door  = Length × Height × Width

7 × 3.5 × 0.65617

        We don’t have width of the door so, to determine it’s volume we use width of wall here.

                              

  16.07646 cft/ft³

STEP-3

         Volume of window  = Length × Height × Width

  3.5  × 3.5 × 0.65617

                                              

  8.038 cft/ft³

STEP-4

              Volume of brick work  = Total vol – (vol of door + vol of window)

                        

                            85.3021 – (16.07646 + 8.038)

                                  

           85.3021 – 24.11446

                                

     61.18764 cft/ft³

STEP-5

              Volume of brick    = Length × Height × Width

19cm × 9cm × 9cm

     1539 cm³

    we have all above units in ft³ so we have to convert cm³ into ft³

 0.054349 cft/ft^{3      without mortar}

         Volume of brick with mortar = 20cm × 10cm × 10cm

      

   2,000 cm³ 

0.070629 cft

Finally we don almost calculations now we have to find number of bricks required to build this wall.

Number of brick required  =  vol of brick work ÷ vol of brick

                                                          

61.18764 ÷ 0.070629

                                             866.32 = 867 Bricks required

Thanks