Let us consider a column of size 230mm.× 300mm. having 3m. height as shown in the drawing.
Given data:
Column size = 230mm. × 300mm.= 0.23m. × 0.30m.
Height of the column = 3m.
Grade of concrete = M20.
A. Material cost
1. Concrete:
The volume of concrete in the column
= [ L × B × H]
= [0.23m. × 0.30m. × 3m.]
= 0.207 CUM.
Before proceeding further, Go through the article👇
The material cost of M20 grade concrete = INR 6065.42/ CUM.
( M20 cost is taken from the above-mentioned article.)
The material cost of column concrete
= [vol. of concrete in CUM × rate/ CUM]
= [0.207 × 6065.42/-]
= INR 1255.54/-
2. Steel:
Let us consider the reinforcement in the column as shown in the below-given drawing.
Here, we are calculating the cost of steel for the 3m. (3000mm.) height of the column. i.e. from the plinth level to the bottom of the slab.
Given data:
Longitudinal bars 👉 16mm. ∅ - 4 nos.
Lateral ties 👉 8mm. ∅ - 250mm. c/c.
Clear cover 👉 40mm.
Total no. of lateral ties
=[ {length of the longitudinal bar ÷ stirrup spacing} + 1]
= [{3000mm ÷ 250mm.}+ 1]
= [12 + 1]
= 13 nos.
Before proceeding further, Go through the article👇
👀. Bar bending schedule ( BBS ) for columns.
Cutting length of a lateral tie = 0.852m.
( Cutting length is taken from the above-mentioned article.)
Now, let us prepare the BBS table for the column.
|
Sl. No. |
Bar |
Dia. In mm. |
Nos. |
Length In m. |
Total length In m. |
Weight Kg/m. |
Total bar wt. In kg. |
|
1. |
Longitudinal bar |
16 |
4 |
3.0 |
12.0 |
1.58 |
18.96 |
|
2. |
Lateral ties |
8 |
13 |
0.852 |
11.076 |
0.395 |
4.375 |
|
3. |
Total weight of bars = |
23.34 |
|||||
|
4. |
Add 2% wastage = |
0.47 |
|||||
|
5. |
The grand total wt. of rebar's = |
23.81 |
|||||
The material cost of steel
= [total wt. in kgs. × steel rate/kg.]
= [23.81 kg. × 50/-]
= INR 1190.50/-
B. Labor cost:
The total labor cost of column = INR 928.32/-
The labor cost is taken from my article 👇
👀. How to calculate the labor cost for RCC columns?
Now, let us calculate the total cost of a column in the table format.
|
Sl. no. |
Item. |
Description. |
Cost in INR. |
|
1. |
Material cost |
|
|
|
2. |
M20 concrete |
For 3m. column |
1255.54 |
|
3. |
Steel |
For 3m. column |
1190.50 |
|
4. |
Curing |
Lump-sum |
50.00 |
|
5. |
Miscellaneous |
Lump-sum |
100.00 |
|
6. |
The material cost = |
2596.04 |
|
|
7. |
The Labour cost= |
928.32 |
|
|
8. |
The cost of column= |
3524.36 |
|
|
9. |
Add 10% contractors profit = |
352.44 |
|
|
10. |
The total cost of 3m. height column= |
3876.80 |
|
Note:
1. To get accurate results, insert the ongoing market rate of labor & materials in your country.
2. This article is to understand the column cost calculation procedure. In no way, the cost will be similar to the column of all sizes.
3. The cost of the column varies depending upon their size, location, concrete grade, %ge of reinforcement, etc.
To go through rate analysis & cost-related articles, click here.
Thank you for going through this article❤. Have a good day 😄.
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