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Malta College of Arts, Science & Technology

BTEC National Diploma in Construction

Unit 09 Measuring, Estimating and Tendering Process in Construction and the Built

Environment

Assignment E

P9.5

Show how you would deal with each of the following in a Bill of Quantities

and in each of them, explain how the tender price may be affected.

a) Reinforcement to be supplied by a nominated supplier and fixed by a

main contractor.

b) Sanitary appliances to be supplied and fixed by a nominated sub-

contractor.

c) Joinery shelving is required but the designs have not yet been finalized

although the type of work can be identified.

REF DESCRIPTIONCONT

R.QTY

UNIT RATETOTALVALUE

9.5a Supply of Reinforcement

A52.1.1.1Supply only of high yield / mildsteel reinforcement bars, suppliedby NJM Limited

(i) T25, straight in 12m lengths

650.00

tns

800.00

12,500.0

0

(ii) T12, straight in 6m lengths

425.00

tns

700.00

75,300.0

0

(iii) R6, links, 400 by 400

164.00 tns

1,000.00

9,800.00

A52.1.2 Main contractors profit on EPLimited,

% 97,600.00

Nominated supplier, as above

Fixing of Reinforcement

Name: Kurt Spiteri19/05/2010NDBS2 1

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E30.1Fixing only of high yield / mildsteel reinforcement bars, suppliedby NJM Limited

E30.1.1.1T25, straight

650.00

tns

E30.1.1.1.3

T12, straight, vertical, 6.00 9.00m

425.00

tns

E30.1.1.4R6, links

164.00

tns

9.5b Supply and Install Sanitary Ware

A51.1.1.1

Supply and install in placecomplete bathroom sets from NJMLimited catalogue reference357.8c, beige, including allnecessary fixtures and fittings asbelow.

300.00

20,250.0

0

360.00

17,300.00

WC complete with flushing, HDseat, angle valve, flexible andtoilet connector.

125.00

Nr.

280.00

18,000.0

0

WHB complete with pedestal,fixing hooks, 2 angle valves, 2flexible and single lever mixer(cat. Ref. 974.5d).

125.00

Nr.

130.00

7,950.00

Bath tub complete with levelinglegs and single lever stainlesssteel mixer with shower (cat. Ref.638.7a)

125.00

Nr.


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63,500.0

0

Bathroom wall mountedaccessories including towel holder,towel ring, toilet paper holder,WHB soap holder and bath soapholder.

125.00

Nr.

80.00 10,000

A51.1.2Main contractors profit on NJMLimited, as above % 51,250

9.5c Supply and fix joinery shelving

A54.1.1

Supply and fix joinery shelving tobe fixed to limestone single wallscapable to take a minimum load of32kg, design and material yet tobe defined.

Approx. 2,500 linear meters2.00

PROV 7,164 14,328

The client would go to the main contractor, supplier or sub-contractor and selects

that person who he would like to do the works. After the selection these

person/people, they must stay in contact with the main contractor.

The only thing that the supplier could be affect is the cost of the material.

The last factor is the provisional sum.

The value of the provisional sum could change because of the changes occurring

during the work being done. This could result in material, overheads, labor and the

profit to increase.


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Environment

P9.6

Give examples of three different methods of tendering that can be used

for the main contract, sub-contract works or supply packages and explain

how these may affect pricing strategies.

The three methods of tendering are:

The Open Tendering,

This type is used where it could create or provide benefits for the potential

providers.

Benefits of open tenders are: Ensuring fairness to potential providers.

Improving decision making by considering a range of potential purchasing

options.

Identifying new potential providers.

Assisting to establish reasonable prices for services.

Using competition to improving the efficiency and quality of services for

clients.

If opting for an open tender the number of potential responses is larger and as so

the lead agency may use a multi-stage tender comprising requests to guaranteethat the responses is manageable and as big as possible so that the costs are kept

to a minimum.

The Selective Tendering,

A selective tender takes place when the client selects which company or companieswill be invited to tender for the business. An example of such could be that aparticular company could have left its contact details to this particular client in thepast and when that same client started a project he would choose them.

The Negotiating Tendering

The Negotiating tender method is a simple method of how to do the work. Here the

same people who do the tender decide on a contractor. After the contractor is

chosen, they would set up a meeting regarding the tender. By using the

negotiating tender one could distinguish the difference in prices that other

contractors would have given them for that tender. In such situations the


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Environment

client would know the people and companies selected and as so many times work

are carried out faster and better.


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Environment

M9.4

From the given sheet, prepare the relevant Bar Bending Schedules for the

required reinforcement. From such schedules prepare appropriate Tender

BOQs and explain how your chosen method of tendering matches the

different nature of each project listed below:

a) The supply only of all reinforcement and related accessories

b) Sub-contract works for all the cutting and bending of all the required

steel, and

c) The main-contract package including for the supply, cutting, bending

and fixing on site of all the required concrete, formworks and

reinforcement.

Project Name: File Ref:

QS Name: Kurt Spiteri Date:

____________________

Val Ref: ____________________ Sheet No: ____________________

Description / Ref: Description / Ref:

2/2.2

0

2/2.40

0.45

4.1

4

Formwork for

Footings

m


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2.40

2.20

0.45

2/1.6

5

2.1.4

5

4/0.1

5

2/6.8

1.05

14.

28

2.3

76

1.0

71

Formwork for

Walls

m

Concrete Footings

cm

Concrete Walls

cm

REF DESCRIPTIONCONTR.

QTYUNIT

RATE

TOTVALUE


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9.4a Supply Only

A52.1.1.

1 Supply only of high yield / mild steelreinforcement bars, supplied by SLLimited

(Nominated Supplier)

Bent

(i) R6 0.01 tns

(ii) R10 0.03 tns

(iii) R12 0.04 tns

(iv) Y20 0.16 tns

Straight

(i) R6 0.02 tns

(ii) R10 0.05 tns

A52.1.2 Main contractor s profit on SL Limited, %

Nominated supplier, as above

9.4b Cutting and Bending of reinforcement

A51.1.1.1

Cutting and bending of reinforcementfrom YC

Limited (Nominated Sub-contractor)

Bent

(i) R6 0.01 tns

(ii) R10 0.03 tns

(iii) R12 0.04 tns

(iv) Y20 0.16 tns

Straight(i) R6 0.02 tns

(ii) R10 0.05 tns

A51.1.2 Main contractors profit on YC Limited, %

Nominated sub-contractor, as above.


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9.4cSupply, Cut, Bend, Fix of concrete,formworks and reinforcement

E05.1.0.0.1

In situ concrete, foundations,reinforced

2 m3

E05.7.1.0.1

In situ concrete, walls, thickness 150mm,

1 m3

reinforced

E20.1.1.3 Formwork for in situ concrete, sides of

4 m2

Foundations, plain vertical, height 250

500mm

E20.12.0.1

Formwork for in situ concrete, walls,vertical

14 m2


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Bar Bending Schedule;

Member

BarMark

Type&Size

No. ofmember

No. ineach

Totalnumber

Length Shape

TotalLength

TotalWeight

Bartype 1 01 Y20 1 12 12 2800 33600 82.86

02 R12 1 8 8 2800 22400 19.89

03 Y20 1 11 11 3000 33000 81.38

04 R12 1 7 7 3000 21000 18.65

Bartype 2 05 R10 2 8 16 1690 27040 16.66

06 R10 2 16 32 1625 52000 32.03

08 R6 2 8 16 790 12640 46.7709 R6 2 8 16 1410 22560 83.47

Bartype 3 05 R10 1 5 5 1690 8450 52.05

06 R10 1 10 10 1625 16250 10.01

08 R6 1 8 8 790 6320 23.38

10 R6 1 8 8 1610 12880 47.66

Bartype 4 05 R10 1 5 5 1690 8450 52.05

06 R10 1 4 4 1625 6500 40.04

07 R10 1 6 6 1130 6780 41.7708 R6 1 8 8 790 6320 23.39

10 R6 1 8 8 1610 12880 47.66


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D9.3

Examine and evaluate the advantages and disadvantages of Microsoft

Excel and AutoCAD for facilitating the estimating, tendering and on-site

progress measurements and bills.

There are quite a few advantages and disadvantages in using Microsoft Excel. The

advantages are;

If you have the Microsoft Office in your PC, you don't need anything else to be

installed in your computer. You are good to go and can start with your

programming straight away.

If you are a beginner, you can easily learn the Excel VBA Programming

because you are half familiar with the programming platform that you are

going to use, which is Excel.

you can start with small Excel application and as the need grows especially

on records that are getting huge, you can still use the same Excel

application and upgrade your database platform from Excel to other high-

end like Access, SQL Server, Oracle, MySQL, etc.

Excel is capable of connecting directly to OLAP databases and can beintegrated in Pivot Tables.

Excel is portable. You can send it to someone through email.

Excel application also has its disadvantages. But these disadvantages are

sometimes having some workaround that can be done to fix or sometimes there are

little effect that you can just live with them;

When you develop your application into one file it can be huge and will make

your program execution very slow

When you separate functions to multiple files, Excel files are prone to get lost

in your hard drive especially when you break your application to too many

files. You should practice a good folders/sub-directories management.


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Excel worksheet as a database has a limited number of rows or records that

you can store. But when you reach the 65k lines limit, you can convert it

easily to Access and the rest of the application is can still be used.

If you can send Excel via email, you can accidentally send your file to

someone who should not have it or not authorized to have it.

If you compare 2D CAD, against old-school design / draughting using drawing

boards, you'll already know, the advantages outweigh the disadvantages.

A few advantages of 2D CAD:

Reduced design timescales.

Reuse of designs. Drawing errors can be corrected easily.

Drawings can be sent/received via email in seconds.

Disadvantages:

Time & cost of implementing the CAD system.

Time & cost of training people to use the CAD.

Time & cost of migrating legacy drawings into CAD format.

If you compare the use of 3D CAD against drawing board draughting. The list of

disadvantages pretty much stays the same, whilst the list of advantages growsfurther.

Advantages of 3D CAD:

More stylish /complex products can be designed using 3D surfacing.

Parametric modeling allows many design iterations to be generated &

evaluated quickly.

Designs can be analyzed and optimized virtually using finite element

analysis.

Clearance/interference checks can be made easily

3D CAD data can be imported directly in to CAM software, further reducingtimescales and mistakes from interpretation of 2D drawings.


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