Overview
Before getting into the topic, let's have a basic idea of how cement punning works.
In our previous blog: https://www.ieccc.com.np/2024/06/cost-of-cement-concrete-flooring.html, we discussed concrete flooring, or screeding. We have various options for finishing work over screeding work. We can place tiles, marbles, or carry out cement punning work over it. If you want to do parqueting over the floor, you need to do cement punning work over the floor that provides a uniform, smooth finish to the floor and also improves the moisture-resistant features of the concrete. Here in this blog, we are doing a rate analysis on cement punning work. The thickness of the cement punning work is 1.5 mm to 3 mm. We are considering 3 mm-thick cement punning work.
Calculations
Before carrying out the calculation work, let's first mention the codes we are following for this rate analysis.
- Kathmandu District Rate: 079/80
- DUDBC Norms
We are taking rates from Kathmandu district rate 079/80 for the rates of materials and workers. According to DUDBC norms, we are taking the number of workers required for unit work. You can get download links and detailed knowledge in our previous blog: https://www.ieccc.com.np/2024/06/cost-of-m20-grade-concrete-in-Nepal.html.
The major headings for cost analysis are:
- Materials and cost
- Workers and cost
- Tools and plant rates
- Contractor's overhead
We are taking 10 sq. m. of floor area into consideration for rate analysis as we are provided with the number of workers required per 10 sq. m. of floor area in DUDBC norms. As mentioned earlier, we are taking a thickness of 3 mm into consideration.
Materials estimate
Floor area: 10 sq. m.
Thickness of cement: 3 mm = 0.003 sq. m
Volume of cement: floor area * Thickness of cement
= 10 * 0.003
Volume of cement: 0.03 cu.m.
This is the wet volume of cement. We need a dry volume of cement for the calculation. For the dry volume calculation of cement, we take 25%; for mortar, we take 33%; and for concrete, we take 54%.
Dry volume = 1.25 * wet volume
= 1.25 * 0.03
Dry Volume = 0.0375 cu.m.
Taking into consideration the density of cement as 1440 kg/m3 and the mass per bag of cement as 50 kg, we are calculating the number of bags required.
Mass = Density * Volume
= 1440 * 0.0375
Mass = 54 kg
Number of bags of cement required: 54/50 = 1.08 bags
From the district rate of Kathmandu, 079/80
Cement: 1.08 bags at 700 = Rs. 756.00
Cost of materials: Rs. 756.00
Workers as per DUDBC and KTM district rates: 089/80
Skilled workers: 1 at 1185.00 = Rs. 1185.00
Unskilled workers: 1 at 870.00 = Rs. 870.00
Cost of workers: 1185.00 + 870.00 = Rs. 2055.00
For the hire of tools and plants,
We take 3% of unskilled workers = 3% of 870.00 = Rs. 26.10.
Total cost: materials cost + workers cost + tools and equipment hire cost
= 756.00 + 2055.00 + 26.10
Total cost: Rs. 2837.10
Including the contractor's overhead and profit
Contractor overhead: 15% of the total cost
= 15% of 2837.10
Contractor overhead = Rs. 425.56
Total cost per 100 square meters of cement punning work: 2837.10 + 425.56 = Rs. 3262.66
Total cost per unit square meter of cement punning work: 3262.66/10 = Rs. 326.26
Summary of rate analysis for cement punning work
|
3 mm thick fine cement punning works per 10 sq m of floor area |
||||||
|
Description |
Type |
Unit |
Quantity |
Rate |
Amount |
Remarks |
|
Workers |
Skilled |
MDay |
1.00 |
1185.00 |
1185.00 |
|
|
Unskilled |
MDay |
1.00 |
870.00 |
870.00 |
|
|
|
Materials |
Cement |
Bags |
1.08 |
700.00 |
756.00 |
|
|
Tools and plants account for 3% of unskilled workers. |
26.10 |
|
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|
Sub-Total |
2837.10 |
|
||||
|
Contractor overhead and profit at 15% |
425.56 |
|
||||
|
Total cost per 10 square meters of concrete flooring |
3262.66 |
|
||||
|
Total cost per unit square meter of concrete flooring |
326.26 |
|
||||
In words: Rs. three hundred twenty-six and twenty-six paisa only.
Others
The calculation steps and process are the same for other thicknesses of cement punning. You can calculate the rate analysis for other thicknesses of punning work accordingly.
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