TUTORIALS
Rate analysis of the brick work or brick masonry in the superstructure brick size
Standard size of brick is 19 cm x 9 cm x 9 cm without mortar
With mortar, standard size of brick is increased by 1 cm, i.e. 20 cm x 10 cm x 10 cm
Numerical - Give the rate analysis of first class brickwork in cement mortar. The ratio is 1 is to 6 in superstructure or the standard size of brick is 19 cm x 9 cm x 9 cm
Solution:
Size of brick = 19 cm x 9 cm x 9 cm = 0.19 m x 0.09 m x 0.09 m [brick size without mortar]
With mortar, the size of brick is increased by 1 cm = 20 cm x 10 cm x 10 cm
In meters, it is = 0.2 m x 0.1 m x 0.1 m
Considering 10 m3 of volume of brickwork
Step 1 – Calculation for quantity of materials
a) Volume of brick without mortar = 0.19 m x 0.09 m x 0.09 m = 1.539 x 10-3 m3
b) Volume of brick with mortar = 0.2 x 0.1 x 0.1 = 2 x 10-3 m3
c) Quantity of each material
1) Number of bricks without wastage = 10/2 x 10-3 = 5000
Add 5% bricks for wastage = 5/100 x 5000 = 250
Total number of bricks with wastage = 5250
Wet volume of mortar = 10 - 5000 x 1.539 x 10-3 = 2.31 m3
Add 25% mortar for frog filling, wastage, etc. = 25/100 x 2.31 = 0.577 m3
Total wet volume of the mortar = 2.9 m3
Dry volume of mortar = 30% more than total wet volume of the mortar = 1.30 x 2.9 = 3.77 m3
Quantity of cement = 3.77/1+6 x 1 = 0.538 m3
Number of bags = 0.538/0.035 = 16 bags [Volume of 1 bag of cement = 0.035 or 35 litres]
Quantity of sand = 3.77/1 + 6 x 6 = 3.23 m3
Step 1 – Calculation for cost
| Particulars | Quantity | Rate | Per | Amount in rupees |
|---|---|---|---|---|
| Materials, Cement, Sand, Bricks | 16 for cement, 3.23 for sand, 5250 for bricks | 350 for cement, 1350 for sand, 4500 for bricks | Kg for cement, M3 for sand, 1000 numbers for bricks | 5600 for cement, 4360.5 for sand, 23625 for bricks |
| Total Amount | 33585.5 | |||
| Labour | ||||
| Head mason | ½ numbers | 600 | Per day | 300 |
| Mason | 10 numbers | 500 | Per day | 5000 |
| Male Majdoor | 10 numbers | 300 | Per day | 3000 |
| Female Majdoor | 10 numbers | 250 | Per day | 2500 |
| Bhisti | 2 | 200 | Per day | 400 |
| Total Amount | 11200 | |||
| Total Cost (Materials + Labour) | 44785.5 |
Add 1.5% for water charges = 1.5/100 x 44785.5 = 671.8
Add 1.5% for tools & plants = 1.5/100 x 44785.5 = 671.8
Add 3% for lump sum = 3/100 x 44785.5 = 1343.6
Add 10% for contractor profit = 10/100 x 44785.5 = 4478.55
Grand Total = 51951.3
Rate per m3 = 51951.3/10 = 5195.13
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Lecturer: Parag Pal
