Detail estimate to find out the cost of the item how much is required
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| HOMETECHBD |
However, there are usually three things to consider in the estimation
1) Volume
2) Area
3) Length
1) Volume is usually calculated as follows
A. Excavation or filling of soil
b. Concrete
a) Cement Concrete,
b) R. C. C.
c. Brick work (except brick saling)
d. woodwork
2) Area which has to be calculated
A. White wash
b. Color work
c. Brick walling
d. Plastering
e. Damp proof course
3) Length
Usually the weight of the rod is calculated by determining the length of the rod. And. C. C. The rod is not straight. Rods are usually in some special positions like hook, crank, lap etc. So there are several things to know before determining the rod length, which is commonly used in rod estimation.
Length of hook = 12 X diameter of rod = 12d
Considering 450 crank, additional rod for crank = 0.42 x (effective depth) = 0.42d
Lapping length
a) In case of compression = 45d
b) In case of tension = 60d
We can use the table below to estimate rod length.
Diameter of Rod (mm) Weight/ Meter Cross Sectional Area (sq cm)
6 mm 0.222 0.283
8 mm 0.395 0.503
10 mm 0.616 0.785
12 mm 0.888 1.131
14mm 1.208 1.539
16 mm 1.579 2.011
18 mm 2.000 2.545
20 mm 2.466 3.142
22 mm 2.983 3.801
25 mm 2.854 3.909
28 mm 4.835 6.158
32 mm 6.313 8.042
A few examples
1:2:4 Ratio 100 cft R.C.C Casting Materials Required:
Materials quantity is unit
Cement 17 bags
Sand 43 CFT
Khoya 86 CFT
850 bricks
2.5 Masons
Labor 6 people
Rod tying mason and labor 2 people
Materials required for making 100 sft 1.5 inch thick damp proof course of 1:1:5:3 ratio:
Materials quantity is unit
Cement 3 bags
Sand 5.5 CFT
Khoya 11 CFT
Padlow 2.25 kg
Bitumen 15 kg
1 engineer
Labor 2 people
Plinth Area Rate (According to Brickwork)
[As per P.W.D Schedule, 1997]
Sequential Description *Rate (Rs.) Rate per sq. meter plinth area
A
Foundation rate of house
The rate of 1st floor building is 1510
Rate of 2 storey building is 1685
Rate of 3 storey building is 1870
4 storey building rate 2160
5 storey building rate 2430
b
Rate of superstructure portion of house
Rate of 1st floor building is 3880
2 storey building rate is 4740
3 storey building rate is 4860
4 storey building rate is 4980
Rate of 5 floor building is 5280
c
Watershed and
Parapet
360
Construction Work Rate (as per P.W.D Schedule November, 1997)
Sequential Description *Rate (Rs.) Rate per sq. meter plinth area
A
Foundation rate of house
The rate of 1st floor building is 1820
2 storey building rate 2020
3 storey building rate 2245
4 storey building rate 2490
Rate of 5 floor building is 2770
Sequential Description *Rate (Rs.) Rate per sq. meter plinth area
b
Rate of superstructure portion of house
The rate of 1st floor building is 6190
Rate of 2 storey building is 5690
3 storey building rate is 5830
4 storey building rate is 5930
5 storey building rate is 6130
Rate of 6 floor building is 6290
c. Additional cost for other works will be Rs. 950 to 1600. Additional cost will be added for advanced finishing work.
d. The cost of water supply and sanitary works inside the house should add up to 15% of the total cost of the house.
e. The cost of electrical work inside the house should add up to 15% of the total cost of the house.
f.
Boundary wall 5 inch wall 8 feet interval (10”x 10”) Brick pillar 5 feet brick wall construction cost Rs.1.92 running meter.
Boundary wall [in case of RCC (concrete) frame] RCC In case of 5” brick wall in frame the cost is approximately Rs.2.8 per running meter.
12 kg star barbed one (2 ply 4 points) on boundary wall at the rate of Tk 220 per meter
The cost of building a house is broken down into different parts as shown below. Here the cost is given as a percentage.
Serial No. Description of various parts of the building *Percentage of total cost
A Foundation cost (up to plinth) 20%
b Cost of superstructure
upper part of the foundation)
80%
100%
Various stages of house construction cost are given in detail.
Sample cost of house construction:
Serial No. Description of Work *Percentage Calculation of Cost Remarks
(a) Consultant Fee Design and Supervision Expenses)
03% of total cost
b Water Supply and Sanitary Expenditure 02% of Total Expenditure
c Electricity cost 02% of total cost
d Gas cost 03% of total cost
e Cost of construction materials 55% of total cost
f Labor cost 20% of total cost
(g) Contractor's Allowance 10% of total cost
Serial No. Description of Work *Percentage Calculation of Cost Remarks
h Miscellaneous 05% of Total Expenditure
100% of total cost
I think the total cost of building a house will be 50,00,000/-.
Example of construction cost of a complete house
Serial No. Description of Work Expenditure Share (%) *Rs
A consultant fee design
Supervision expenses
2.5%
0.5%
1,25,000/-
25,000/-
B Cost of construction materials 55% 2,75,000/-
c Labor cost 20% 10,00,000/-
d Water supply 02% 1,00,000/-
E Electricity cost 02% 1,00,000/-
f Gas cost 03% 15,00,000/-
G Contractor profit 10% 5,00,000/-
h Miscellaneous 05% 2,50,000/-
Total cost 100% 50,00,000/-
House Construction Labor Rate (Mason's Rate)
Serial No. Labor (Mistry) Unit Time *Rate/Rate (Rs.)
A Head Roadmaster
Head Carpenter
Head painter
Head Bitumen Mistry
Head plumber
200 per day
B. Roadmaster
Carpenter
Painter
Bitumen Mistry
the plumber
160 per day
c every day
Skilled Helper 120
Skilled labor 100
General labor 80
Skilled Technician 120
Foreman 200
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