We have already discussed the importance of rate analysis. and how it will help us to face everyday scenarios.

Contents of the Article

## Estimation of Material Quantity

Assume that we are going to analysis the rate for 1 m3 of  Brickwork (B.W)

STEP 1 – Volume of single brick without mortar

Volume of 1 brick without mortar  = 0.19 x  0.09  x 0.09 = 0.0015 m3

STEP 2 – Volume of single brick with mortar

While brickwork construction we will add cement mortar around 3 sides (left, right & top).

So adding 10mm thick on each side of brick as mortar thickness

The volume of brick with mortar = (0.19+0.010) x (0.09+0.010) x (0.09+0.010) =  0.20 x 0.1 x 0.1  = 0.002 m3

The volume of 1 brick with mortar = 0.002 m3

STEP 3 – Number of bricks for 1 m3 Brickwork

Number of bricks with mortar for 1 m3 = 1 cubic meter / volume of bricks with mortar = (1/0.002)= 500 Nos

So the required number of bricks for 1 m3 = 500 Nos

STEP 4 – Cement Mortar Volume for 1m3 of Brickwork

Cement Mortar Volume = Volume of brickwork with mortar – the volume of bricks without mortar

Volume of bricks with mortar in 1 m3 = 500 x 0.002 = 1 m3

Volume of bricks without mortar in 1 m3 = 500 x 0.001539 = 0. 7695 m3

Therefore required cement mortar = 1 m3 – 0.7695 m3 = 0.2305 m3

Step 5 – Calculate Cement & Sand Volume

As we know the required cement mortar = 0.2305 m3

Assuming cement mortar ratio as 1:5 (1 Part Cement : 5 Part Sand)

We have already discussed the cement mortar volume calculation in plastering work post.

The above formula will give a dry volume of cement mortar, So to get wet concrete volume, we have to multiply the dry volume by 1.33

Total Parts = 1+5 =6

Required Volume of Cement = 1/6 x 1.33 x Mortar Volume = 1/6 x 1.33 x 0.2305= 0.0511 m3

To convert into cement bags  – (0.0511 x 1440)/50 = 1.47 Bags or 73.58 Kg

Required Sand Volume = 5/6 x 1.33 x Mortar Volume = 5/6 x 1.33 x 0.2305 = 0.2554 m3

## Required Material Quantity

Materials required for 1 m3 Brickwork is

• 500 Numbers of bricks
• 73.58 Kg or 1.47 Bags of cement
• 0.2554 m3 of sand

## Labour Estimation

From our thumb rule estimation (Labour Output Per Day), we are calculating the labour estimation as follow,

 Description Unit Qty Rate Amount Analysis of the rate for 1 m3 of  Brick Work (B.W) in Cement Mortar 1:5 (1 Cement: 5 coarse sand) using common burnt clay bricks of class designation 75, including curing, etc. Materials Cement Bags 1.47 350 514.5 Sand m3 0.2554 1800 459.72 Bricks including wastage Nos 500 7 3500 Manpower Mason Each 0.4 700 280 Male Mazdoor Each 0.5 500 250 Female Mazdoor Each 0.5 400 200 Waterman Each 0.2 400 80 Subtotal 5284 Tools & Tackles 1% 53 Add for Sundries & Contingencies 3% 158.5 Add for Overhead & Contractor profit 10% 528 Total 6023.5 Rate per m3 6023.5

You may download the Excel Sheet of Rate Analysis: Rate Analysis Sheet

Satheesh is a Civil Engineer who has more than 11+ Years of experience in residential construction. He is the author, editor of Civil Planets