DCE003: ESTIMATION AND COSTING Assignment, Singapore You are the quantity surveyor of your company and recently your company is taking part in the tender to build a single story house
The purpose of this assignment is to:
L01: Understand the types of estimation used in the construction industry.
L02: Understand analysis of rates used in the construction industry.
L03: Understanding various excavation types.
L04: Understand different methods of taking out estimates.
L05: Understanding different methods of valuations.
Questions
1. You are the quantity surveyor of your company and recently your company is taking part in the tender to build a single story house. Based on the following tender drawing and table you calculate the following using center line method:
| S. No | Description of work | Unit | No | Measurements | Volume | ||
| L | B | H | |||||
| 1 | Excavation for foundation | M3 | |||||
| 2 | Concrete in foundation | M3 | |||||
| 3 | Brick work in cement mortar
1st step 2nd step 3rd step 4th step 5th step |
M3 | |||||
| 5 | Interior-Plastering works ( deduct at doors and windows) | M3 | |||||
| 6 | Brick works volume from ground floor level to ceiling level | M3 | |||||
a. Earth work for foundation volume
b. Lime concrete volume in foundation
c. Brick work with cement mortar volume
d. Interior-Plastering works ( deduct at doors and windows)
e. Brick works volume from ground floor level to ceiling level (25 marks)
2. Calculate the number of cement bags, sand & aggregate for M 20 (1:1.5:3) & M15 (1:2:4) concrete having a volume of 19 m3 & 35 m3 respectively.
Calculate the sand & cement requirements for 2 m3 of CM 1:6 & CM 1:4
Estimate the quantity of earthwork for a portion from the following data:
| Road length | 0m | 30m | 60m | 90m | 120m | 150m |
| FORMATION RL | 210 | 209 | 208 | 207 | 206 | 205 |
| EXISTING RL | 206.80 | 205.20 | 203.00 | 204.50 | 202.00 | 201.50 |
3. Prepare a lead statement for the following items: –
| S. No | Material | Rate at source | Lead in KM | Conveyance charges $ per KM | Cess charges $ | ||
| MT | CT | ST | |||||
| 1 | Cement | $2500/ 1 TONS | 5 | 5 | 3 | 6 | 25 |
| 2 | Bricks | $95/1000 Nos | 2 | 5 | 6 | 7 | 20 |
| 3 | Sand | $25/m3 | 7 | 8 | 9 | 10 | 35 |
| 4 | 40mm HBG metal | $300/m3 | 8 | 6 | 7 | 9 | 15 |
The formation level starts at RL 210.000 and the chainage length assumes 30m. The proposed road shall be at the falling gradient of 1 in 30. The side slope shall be 2:1 and the width of the road shall be 10m. Use the Mid-section rule, Trapezoidal rule & Prismoidal rule.
4. Estimate the quantity of earthwork for a portion from the following data:
| Road length | 0m | 30m | 60m | 90m | 120m | 150m |
| FORMATION RL | 210 | 209 | 208 | 207 | 206 | 205 |
| EXISTING RL | 206.80 | 205.20 | 203.00 | 204.50 | 202.00 | 201.50 |
5. Prepare an estimate for a proposed commercial complex for a private owner and following are the given data:-
a. Plinth area-1500 m2/floor
b. Height of each floor- 4m
c. No of storeys-G+5
d. Cubical content rate- S$32/m3
Provided the below are the percentage of the structured cost
a. Water supply & Sanitary- 4.5% for each of them
b. Electrical-7%
c. Fluctuation rates- 5%
d. Contractor profit-12%
e. Petty supervision- 4%
6. What are the various methods of valuation and briefly explain
7. Briefly explain various types of excavation works with pictures
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