**9 inches × 4 inches × 3 inches**as shown in the image below.

__Given data:__

Length of the brick wall = 30 ft.

Height of the brick wall = 10 ft.

The thickness of the brick wall = 0.333 ft.

Brick size = **9 inches × 4 inches × 3 inches**

Mortar thickness = 10mm = 0.39 inches

**100cu ft.**

**0.0625 cu ft.**

From the drawing given below, you can observe that the addition of the mortar thickness comes on the 2 sides of every brick.

= 9.39 inches ×3.39 inches × 4 inches

=127.3284 cubic inch.

=**0.0737cu ft.**

1. The number of bricks required

= volume of the wall ÷ volume of the brick with mortar

= 100 cu ft. ÷ 0.0737 cu ft.

=**1357 nos.**

The volume of mortar required

= volume of the brick wall - the volume of the total no. of bricks

= 100 cu.ft. - (1357 nos. × 0.0625 cu.ft.)

= 100 cu ft. - 84.812 cu ft.

=**15.187 cu ft.**

Let us prepare this **15.187 cu ft**. of mortar in a **1: 6** ratio to build this **100** cu ft. of the brick wall.

Dry volume of the cement mortar

= 1.33 × wet volume of the mortar.

= 1.33 × 15.187

= **20.198 cu ft.**

** 2. Volume of the sand**

= (6 ÷ ( 6 + 1)) × 20.198

= 0.8571 × 20.198

= **17.312 cu ft. **

**3. Volume of the cement **

= total dry mortar vol. - volume of sand

= 20.198 cu ft - 17.312 cu ft.

=**2.886 cu ft.**

As you know, one bag of cement = 1.226 cu ft.

Number of cement bags

= 2.886 cu ft. ÷ 1.226 cu ft.

= **2.354bags.**

**Let us now find out the materials required for 1 cu ft. & 1 CUM. of 4" brick wall.**

__1. Bricks:__

Bricks required for 1 cu ft. of brick wall

= 1357 nos. ÷ 100

= **13.57 nos**.

Bricks required for 1 CUM of brick wall

= 13.57nos. × 35.315

= **479 nos.**

__2. Cement:__

Cement required for 1 cu ft. of brick wall

= 2.354 bags. ÷ 100

= **0.0235 bags.**

Cement required for 1 CUM of brick wall

= 0.0235 bags × 35.315

= **0.83 bags.**

__3. Sand:__

Sand required for 1 cu ft. of brick wall

= 17.312 cu ft. ÷ 100

= **0.1731 cu ft.**

Sand required for 1 CUM of brick wall

= 0.1731 cu ft. × 35.315

= **6.11 cu ft.**

** ****Continued ðŸ‘‰ What will be the cost of single (4") brick wall masonry?/ Rate analysis of 4" brick wall.**