Full Assignment BQ - Grade: A PDF

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Summary

1 IntroductionBuilding construction estimating is the determination of problem construction costs at given project. The items and material used contribute to the cost of project. The estimation is prepared before the actual construction. The estimator who can visualize the project and accurately det...

Description

1.0 Introduction Building construction estimating is the determination of problem construction costs at given project. The items and material used contribute to the cost of project. The estimation is prepared before the actual construction. The estimator who can visualize the project and accurately determine its cost will become one of the most important persons in any construction company. Furthermore, the Bill of Quantities is prepared by a quantity surveyor. The preparation is divided into taking off and preparation of the bill. Document that provided in the taking off list act as a reference on the quantification of building works for the purpose of preparing cost estimates and cost plans. Next, Bill of Quantities is the preparation of the bill. It is categorize into three part which is volumes, area and length, entering the description and squared dimension on an abstract and lastly is collecting items together and presenting in a recognised bill order. In estimating the construction costs of project, taking off project is very helpful. Accuracy and correct pricing is important as a part of the bill in taking off process. The priced bill then becomes part of the contract documents, providing the basis for the valuation of the work. Not only that, the taking off process is a source of information in the tendering process. It also used in the operational work of a construction project. In construction site, when the site team can understand what actually the taking off process tell about, it can lead to more efficient management of the project. The items listed and quantities in the bill will give the contractor a detailed of Work Breakdown Structure (WBS) of the project. The information is useful in preparing plan of work, programme and project planning.The taking off process can be used in many administration stages of a proposed development or construction project. Because the Bill of Quantities is a contract document, it is also useful for the legal side of a project. However, the bill is not necessarily useful in every type of procurement method

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2.0 Project Delivery System “Name project” are applying the ‘traditional’ procurement route for the project delivery system. This type of project delivery system is separating design phase and construction phase. It is the most commonly used method pf procuring building works. Here is the summary of the sequence on traditional contract system: -

The client (owner) will appoints consultant to design the project in detail and prepare the tender documentation includes drawing, work breakdown structure (WBS) and Bill of Quantities.

Contractor are then were invited to submit tender for the construction of the project.

The Main Contractor (MC) will be employed by the owner for construction via competitive bid or negotiable tender.

Traditional construction contract is most typically a lump sump contract which is it is a fixed construction contract. Fully developing the design before tender gives the client certainty about design quality and cost, but it can be slower as compared with turnkey contract. The mode also contains considerable contractual protection of the Owner.

It is a low risk method of contracting. The allocation of risk for construction performance rests almost completely on the contractor (MC) and sub-contractor (SC). This type of contacting will give the owner the lowest price available in the market place

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Type of Construction Contract – Bill of Quantities (BQ) Contract

The Bill of Quantities (BQ) is a documentation prepared by Quantity Surveyor (QS) or sometimes Engineer that gives information of detailed measurement of the project and the items of work identified in drawings and specifications as stated in tender documents. It is the most common type of fixed-price contract used in construction industry. Usually, contractor will quote the price unit price or rate for each item of work. The ‘contract price’ is the sum of prices of each item of work as mentioned in Bill of Quantities (BQ). Payments are generally made based on the actual measured quantity of work executed for each item in the BQ and the rate quoted.

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3.0 Work Breakdown Structure

Pandoresa 3 Storey Bungalow

Earthwork

Infrastructure    



Installing Drainage Manhole Sewerage System Water Resources

  

Structure

Soil Investigation Site Clearing Levelling Temporary

Pile Cap

Staircase Slab Beam A.  

Ground Floor Slab Lean Concrete Reinforcement

B.  

Floor Slab Sawn formwork Reinforcement

A.   

Ground Beam Lean Concrete Sawn Formwork Reinforcement

B.  

Floor Beam Sawn Formwork Reinforcement

Stump / Column  

 

Reinforcement Sawn formwork

Masonry

4

Excavation Piling

4.1 Taking Off Sheet

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4.2 Taking Off Data

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5.0 Bill of Quantities

Item

Description

Unit

Quantity

Rate

Amount(RM)

1

PAD FOOTING

A

Excavation i) Top Soil 150mm

m2

20.46

2.25

46.04

ii) exceeding 0.15m but not exceeding 1.5m

m3

31.77

3.38

35.15

iii) exceeding 1.5m

m3

4.10

0.45

1.85

B

Concrete Grade 30

m3

7.60

199.00

1,512.40

C

50mm thick G15 lean Concrete

m3

2.40

170.00

408.00

D

Formwork 6mm thk Plywood

m2

29.16

10.01

291.89

Steel Bar High Steel (T) i) Diameter 20mm

kg

82.86

2.10

174.01

ii) Diameter 16mm

kg

121.78

2.10

255.74

iii) Diameter 12mm

kg

218.90

2.25

492.53

iv) Diameter 6mm

kg

35.20

2.25

79.20

TOTAL

3,296.79

E

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Item

Description

Unit

Quantity

Rate

Amount(RM) 3,296.79

2

COLUMN STUMP

F

Concrete Grade 30

m3

G

Formwork 6mm thk Plywood

m2

E

3.64

199.00

724.36

30.88

10.01

309.11

Steel Bar High Steel (T) i) Diameter 32mm

kg

667.00

2.15

1,424.05

ii) Diameter 25mm

kg

370.04

2.10

777.08

iii) Diameter 20mm

kg

178.62

2.10

375.10

iv) Diameter 16mm

kg

57.23

v) Diameter 12mm

kg

40.79

2.25

91.78

Mild Steel (R) i) Diameter 12mm

kg

85.63

2.15

184.11

ii) Diameter 10mm

kg

146.74

2.15

315.49

iii) Diameter 6mm

kg

27.17

2.20

59.74

TOTAL

7677.8

2.10

120.18

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5.1 Rate of Material and Structural Work No. 1.

2.

Description

Unit

Rate(RM)

Concrete Grade 15

m3

170.00

Concrete Grade 20

m3

180.00

Concrete Grade 25

m3

195.00

Concrete Grade 30

m3

199.00

Concrete Grade 35

m3

210.00

Concrete Grade 40

3

m

223.00

kg

2.25

kg

2.10

kg

2.15

Diameter not exceeding 12mm

kg

2.20

Diameter 12mm

kg

2.15

Diameter 16mm,20mm

kg

2.25

Diameter 25mm

kg

2.10

3mm thick Plywood (4’x8’)

m2

6.05

6mm thick Plywood (4’x8’)

m2

10.01

9mm thick Plywood (4’x8’)

m2

11.40

12mm thick Plywood (4’x8’)

m2

17.15

Top soil depth 150mm

m2

2.25

Trench 15m

m3

0.45

Concrete

Steel Bar High steel Diameter not exceeding 12mm Diameter exceeding 12mm but not exceeding 32mm Diameter exceeding 32mm to 40mm

Mild steel

3.

4.

Timber & Plywood

Excavation

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6.0 Conclusion The site that has been chosen was Ponderosa Bungalow which consist 3 storey building that located at Johor Bahru. The aim of this project is to estimate the cost by using Unit Rate method. It is a standard method of measurement that usually use to measure total cost of material used. Bill of Quantities was done by measuring the quantities of the material in taking off in order to measure the total cost of the project. The structural part that has been calculated for this project is pad footing and stump. Basically, this building consist of 16 and 28 different size of pad footing and stump respectively. Bill of Quantities shows the cost and the total cost to construct pad footing is RM 3,296.79 and Stump is RM 7,677.80. The total cost for both structural part is RM 10,974.59. From Bill of Quantities, the total quantities of material such as reinforcement bar, concrete and formwork needed to construct the building can be known. This will ease the contractor to supply all the material efficiently and reduce the construction waste.

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7.0 References 1) Albino, J. (2019, April 28). Eu Vitória Emanuelly de Oliveira Alves https://veja-abril-com-br.cdn.ampproject.org/v/s/veja.abril.c. Retrieved May 2, 2019, from https://www.youtube.com/watch?v=QrgJGizu-nw 2) The use of Bills of Quantities in building contractor organizations. (n.d.). Retrieved

May

2,

2019,

from

https://www.tandfonline.com/doi/abs/10.1080/01446199300000026 3) Traditional/Conventional.

(n.d.).

Retrieved

May

2,

2019,

from

https://corporate.jctltd.co.uk/products/procurement/traditionalconventional/ 4) DOE G 430.1-1X, (April 2004).”Cost Estimating Guide for Program and Project Management”, US Department of Energy, Office of Management, Budget and Evaluation.

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8.0 Appendix

Figure 1 shows pad footing

Figure 2 show an excavation of pad footing.

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