Rate Analysis for PCC 1:2:4 (M15) – Calculate Quantity & Cost
Performing a
rate analysis for Plain Cement Concrete (PCC) mix 1:2:4 (M15) involves
determining the quantities of materials like cement, sand, and coarse
aggregates required for 1 cubic meter of concrete, as well as calculating labor
and equipment costs. This comprehensive analysis includes material costs, labor
charges, overhead expenses, contractor profit, and equipment or tool costs.
This guide will help you understand the steps involved in performing a rate
analysis for PCC grade M15.
What is
Rate Analysis?
Rate
analysis is the summary of all costs involved in performing a particular work
or unit work, such as material cost, labor cost, overhead expenses, water
charges, and contractor profit. It is essential for estimating and billing
purposes by masons, supervisors, contractors, and for tendering use.
Steps for
Rate Analysis for 1m³ PCC 1:2:4 (M15) Work
The mix
ratio for M15 grade PCC is 1:2:4, where one part is cement, two parts are sand,
and four parts are aggregate. Follow these steps to calculate the quantity and
cost for 1m³ of PCC.
Step 1:
Calculate Dry Volume
- Wet volume of PCC work = 1m³
- Dry volume = Wet volume × 1.54 =
1 × 1.54 = 1.54m³
Step 2:
Cement Quantity
- Cement density = 1440 kg/m³
- Cement quantity = (1/7) × 1.54m³
× 1440 kg/m³ = 316.8 kg
- Number of cement bags (1 bag =
50 kg) = 316.8 / 50 = 6.34 bags
- Cost of cement (INR 400 per bag)
= 6.34 × 400 = INR 2536
Step 3:
Sand Quantity
- Sand quantity = (2/7) × 1.54 ×
35.32 = 15.52 CFT
- Cost of sand (INR 60 per CFT) =
15.52 × 60 = INR 931.20
Step 4:
Aggregate Quantity
- Aggregate quantity = (4/7) ×
1.54 × 35.32 = 31.04 CFT
- Cost of aggregate (INR 60 per
CFT) = 31.04 × 60 = INR 1862.40
Step 5:
Material Cost
- Total material cost = Cement
cost + Sand cost + Aggregate cost
- = 2536 + 931.20 + 1862.40 = INR
5329.60
Step 6:
Labor Rate and Charges
- Labor cost for 1m³ of PCC 1:2:4
= INR 850
- Total cost = Material cost +
Labor cost = 5329.60 + 850 = INR 6179.60
Step 7:
Water Charges
- Water charges (1.5% of material
cost) = 1.5% of 5329.60 = INR 79.94
- Total cost = 6179.60 + 79.94 =
INR 6259.54
Step 8:
Overhead Expenses
- Overhead expenses (2% of
material cost) = 2% of 5329.60 = INR 106.59
- Total cost = 6259.54 + 106.59 =
INR 6366.13
Step 9:
Cost of Equipment and Tools
- Equipment and tools cost (1.5%
of material cost) = 1.5% of 5329.60 = INR 79.94
- Total cost = 6366.13 + 79.94 =
INR 6446.07
Step 10:
Contractor Profit
- Contractor profit (10% of
material cost) = 10% of 5329.60 = INR 532.96
- Total cost = 6446.07 + 532.96 =
INR 6979.03
Summary
Below is the
detailed breakdown of the costs for 1m³ of PCC 1:2:4 (M15):
Cost Component |
Quantity |
Unit Rate |
Total Cost (INR) |
Cement |
6.34 bags |
400 per bag |
2536.00 |
Sand |
15.52 CFT |
60 per CFT |
931.20 |
Aggregate |
31.04 CFT |
60 per CFT |
1862.40 |
Labor |
850.00 |
||
Water Charges |
79.94 |
||
Overhead Expenses |
106.59 |
||
Equipment and Tools |
79.94 |
||
Contractor Profit |
532.96 |
||
Total Cost |
6979.03 |
Conclusion
The typical
estimate to complete 1m³ of PCC with a mix ratio of 1:2:4 (M15) is
approximately INR 6979.03. This includes the cost of materials, labor charges,
water charges, overhead expenses, cost of equipment and tools, and contractor
profit.
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