In this post, we will learn to do the rate analysis of M20 Concrete. Besides rate estimation, we will also calculate the total amount of material i.e. the number of Cement bags, the quantity of Sand, and the quantity of Coarse Aggregate required to prepare the 1 cum of M 20 Concrete.
Rate analysis is the process of working out the total cost involved in any work, cost of material, labour cost, contractor’s profit, overhead charges, etc. Another aspect of Rate analysis is to calculate the amount of material that will be consumed in doing a particular amount of work.
For instance, the total number of cement bags, total quantity of sand and coarse aggregate required, etc. Once you calculate the amount of concrete (1:1.5:3) to be used in construction work. The next step is to determine the total cost per unit of concrete so as to work out the total cost of any project.
Steps in Rate Analysis of M20 Concrete
The following steps are involved in Rate Analysis of M20 Concrete.
Rate of Material
The rate Analysis of M20 Concrete involves working out the rate of material. The rate of material required to make concrete should be known beforehand. The material includes Cement, Sand, and Coarse Aggregates.
Amount of Material
After the rate of material, the next step is to determine the total quantity of sand, cement, and coarse aggregate required for making 1 cum of the concrete of any given grade. How many bags of cement sand and gravel are in 1 cubic meter? Around 8 bags of cement is required for preparing 1 cum of concrete. Total 0.425 cum of sand and 0.85 cum of coarse aggregate is required for 1 cum of M20 grade of Concrete.
Carriage of Material
Once you have determined the amount of material required then the next step is to calculate the rate of carriage. Material like cement, sand, and coarse aggregate will have to purchase from some place. The total expenditure of carrying these materials from that place to place of construction is called carriage of material.
The next step in the Rate Analysis of M20 Concrete is to calculate the amount of labour required. Labour is required for mixing the concrete and placing it in the required place. For this, you will give daily salary to the labours. This salary for the labour accounts for labour cost.
Cost of Equipments
For making concrete of the required grade you will have to use some equipment like concrete mixer and needle vibrators etc. In this step, we will calculate the hire charges of equipment to be used in the process of making the M20 grade concrete.
Example of Rate Analysis of M20 Concrete
|Providing and laying in position specified grade of reinforced cement concrete, excluding the cost of centering, shuttering, finishing and reinforcement – All work up to plinth level||Unit||Qty.||Rate||Amount|
|1:1.5:3 (1 cement : 1.5 coarse sand): 3 graded stone aggregate 20 mm nominal size)|
|Details of cost for 1 cum|
|Stone Aggregate (Single size) : 20 mm nominal size||Cum||0.57||1400.00||798.00|
|Stone Aggregate (Single size) : 10 mm nominal size||Cum||0.28||1350.00||378.00|
|Carriage of Stone aggregate below 40 mm nominal size||Cum||0.85||163.93||139.34|
|Carriage of Coarse sand||Cum||0.425||163.93||69.67|
|Portland Cement (0.2833 cum)||Ton||0.40||5000.00||2000.00|
|Carriage of Cement||Ton||0.40||145.72||58.29|
|Hire charges of Concrete Mixer 0.25 to 0.40 cum with hooper||Day||0.07||800.00||56.00|
|Vibrator (Needle type 40mm)||Day||0.07||350.00||24.50|
|Add 1 % Water charges||62.52|
|Add GST (multiplying factor 0.1405)||887.13|
|Add 15 % Contractor’s profit and overheads||1080.18|
|Add Cess @ 1%||82.81|
|Cost of 1 cum.||8364.20|
Quantity, cost, and carriage of Coarse Aggregates
From the above example, you can see that for 1 cum of M20 concrete, the quantity of Stone Aggregate (Single size): 20 mm nominal size, required is 0.57 Cum. The rate of the stone aggregate of 20 mm size is ₹1400 per cum thus the total cost of 20 mm aggregate will be 0.57 x 1350 = ₹ 798.
The quantity of 10 mm aggregates required will be 0.28 cum. The rate of 10 mm aggregate is 1350 per cum thus the total cost will be 0.28 x 1350= ₹ 378.
Now that, you have calculated the rate of coarse aggregate, the next step is to calculate the rate of carriage of stone aggregate. The rate of carriage will be the same for aggregate size less than 40 mm. Thus we have total aggregates 0.57 (20 mm aggregate) + 0.28 (10 mm aggregate) = 0.85 cum.
The carriage rate will depend on the distance from which these materials are carried. In the example, I have kept the 5 Km of distance mechanical carriage. For5 Km distance the carriage rate is 163.93 thus total carriage amount will be 0.85 x 163.93 = ₹ 139.34.
Quantity, cost, and carriage of Sand
For 1 cum of Cement Concrete of M20 grade (1:1.5:3), the total sand required will be 0.425 Cum. The rate of sand per cum is 1500 thus total amount will be 1500 x 0.425 = ₹ 637.50. For a 5Km distance, the rate for carrying one cum sand is 163.93 thus total cost will be 0.425 x 163.93 = ₹ 69.67.
Quantity, cost, and carriage of Cement
For 1 cum of M20 concrete total cement will be 0.40 tons (8 bags). The cost of 1-ton cement is 5000 thus total amount will be 5000 x 0.40 = ₹2000.00. The rate of carriage of 1 ton of cement for 5Km is 145.72. Thus total carriage amount will be 0.40 x 145.72 = ₹ 58.29.
0.17 mason will be required to complete the 1 cum of the concrete work. 0.17 means 0.17 x day. A day is usually of 8 hours with a 30-minute break. The rate of mason is 749.00 thus total amount will be 0.17 x 749.00 = ₹ 127.33.
Similarly, 2 Beldars per day are required to complete 1 cum of concrete work. The rate of beldar is 645 thus amount will be 645 x 2 = ₹ 1290. The amount for Bhushti will be 0.90 x 714 = ₹ 642.60
Cost of Machinery/equipment
Hire charges of Concrete Mixer 0.25 to 0.40 cum with hooper is 800 per day and quantity of concrete mixer required is 0.07 per day. Thus 0.07 x 800 = ₹ 56 will incur on-hire charges of concrete mixer. Similarly, the hire charges of the needle vibrator is 350, and the quantity of the needle vibrator is 0.07 (0.07 means for 1 cum of concrete needle is required for 0.07 times of the day i.e. 8×0.07 = 0.56 hours. The needle will be required only for 0.56 hours). Thus rate will be 0.07×350 = ₹ 24.50.
The total including sundries works out to be ₹ 6251.55
0.5-1% of water charge is applied at places where the municipality charges for the water to be used in the construction. Thus 1% water charge is applied over ₹ 6251.55 , which is equal to ₹ 6251.55 x1% of ₹ 6251.55 = 6314.07.
12% GST on service is applied if the work is awarded to the contractor. Thus total will be 6314.07. x 0.1405(multiplying factor for 12% GST)+ 6314.07. = ₹ 7201.20.
Contractor’s profit and overhead charges
10 % Contractor profit and 5% overhead charges are applied over the total. Thus ₹ 7201.20 + 15% of ₹ 7201.20 = ₹ 8281.38.
1 % Labour cess is applied over the total amount. Thus total amount will be ₹ ₹ 8281.38. + 1% of ₹ ₹ 8281.38. = ₹ 8364.19
Rate for 1 cum of M 20 Concrete = 8364.19 Say ₹ 8364.20
This is how my friends, we do rate analysis of M20 Concrete.
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