# Some vital tips to find out the cost of one column

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In this exclusive civil engineering video tutorial, vital information is provided to determine the cost of one column. The cost of column is dependent on the size and height of the column.

The process explained in the video can be used for different types of columns with various sizes.

In column concrete and steel reinforcement are used. The concrete includes the quantities of cement, sand and aggregates and reinforcement comprises of steel. The cost of these materials should be calculated individually to find out the cost of column.

Suppose, the size of the column is 9” x 9” = 0.225 m x 0.225 m

The height of the column = 3.1 meter

The volume of concrete = Length x Breadth x Height = 0.225 x 0.225 x 3.1 = 0.157 m^{3}

When M20 concrete grade is used, its ratio is 1:1.5:3

For 1m^{3} concrete, the quantity of cement = 8 bags, sand = 15 cft, aggregates = 30 cft (the calculation is done after converting weight volume to dry volume).

The required quantities of all the materials in column will be as follow :-

Cement = 0.157 x 8 = 1.256 bags

Sand = 0.157 x 15 = 2.355 cft

Aggregates = 0.157 x 30 = 4.71 cft

The price of one cement bag = Rupees 300

The cost of cement = 1.256 x 300 = 376.80

### Also Read: How to measure loads on column

The cost of sand per cft = Rupees 40

The total cost of sand = 2.355 x 40 = 94.20

The cost of aggregate per cft = Rupees 60

The total cost of aggregate = 4.71 x 60 = 282.6

Now, the calculation of steel will be as follow :-

Main bar = 4 pieces T12

Total steel quantities = 3.1 x 4 = 12.4 meter (as height is 3.1 meter)

Ring will be provide as T8@150 c/c

So, total numbers of rings required = 3.1/0.150 m = 20 pieces

So, total quantities of steel required = 0.600 x 20 = 12 meter

The weight of steel with 12 mm dia (T12) = 0.89 kg/meter (calculation is done with D^{2} /162 formula)

So, total weight of steel = 0.89 x 12.4 = 11.036 kg

The weight of steel with 8 mm dia (T8) = 0.40 kg /meter

So, total weight of steel = 0.40 x 12 = 4.8 kg approx.

Therefore, total weight for 12 mm & 8 mm dia bars = 11.036 + 4.8 kg = 15.836 kg

Total cost of steel x 15.836 x 50 = Rupees 791.80

Video Source: Civil Engineer Deepak Kumar

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