14-CI-A7 - Version anglaise - Novembre 2014.pdf

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14-CI-A7 Building Construction Management – November 2014 Page 1 of 6

ORDRE DES INGÉNIEURS DU QUÉBECNOVEMBER 2014 SESSION

All documentation is permitted

Calculators: allowed models only

Exam duration: 3 hours

14-CI-A7 BUILDING CONSTRUCTION MANAGEMENT

Question 1 (4 points)

List and briefly describe the ways projects may be terminated.


What are the advantages of top-down budgeting and of bottom-up budgeting? What is the

most important task for top management to do in bottom-up budgeting?


When might a firm choose to reduce a project? What factors must be considered in making this

decision?


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Project crashingYour company is committed to deliver a project, whose schedule is shown below, in 41 days considered

as the normal duration of the project.

The contract do not contains any bonus-penalty clause. Fixed overhead costs are $ 500 (at the beginning

of the project). Variable overheads are $ 800 / day.

Table 1 shows for each activity, the normal and compressed durations and direct costs. Taking account of

these data:

Calculate the minimal duration of the project. (8 points)

Draw the "Direct Cost / Time" curve for this project. (3 points)

Draw the "Indirect Cost / Time" curve for this project. (4 points)

Taking into account the direct and the indirect costs, draw the "Total Cost / Time" curve. (3

points) Determine the optimum duration to complete this project and the relative cost of this duration.

(2 points)

Table 1

Normal Compressed

Activity Duration Cost Duration Cost

A 7 3 600$ 6 3 900$

B 5 5 500$ 3 6 500$

C 9 6 350$ 7 7 200$

D 19 4 700$ 18 4 900$E 10 2 050$ 9 2 200$

F 8 1 200$ 6 1 700$

G 5 7 200$ 5 7 200$

H 11 9 450$ 10 10 000$

I 7 4 500$ 6 4 700$

TOTAL 44 550$

21 21

4

29 29

5

34 34

9

41 41

10

31 34

7

33 34

8

22 23

6

12 12

3

0 0

1

7 7

2

A

7

B C

E H

D

F G I

5 9 8 5 7

19

10 11


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Using the data in Table 2, draw the AOA diagram (Activity-On-Arrow) and indicate the critical

path.

Indicate the Early Start (ES), the Early Finish (EF), the Late Start (LS), the Late Finish (LF), the

total Float (TF), and the Free Float (FF).

Table 2

ACTIVITYDURAT

IONPREDECESSOR

G 7 None

H 10 GI 4 G

J 5 G

K 4 H

L 5 H, I

M 8 J

N 3 I, M

O 12 K, L, N

P 4 L, N

R 7 L, N

S 8 R


In order to perform the earthworks of a highway construction project, the estimator must

adequately establish the dimensions of cuts and fills. The volumes to be calculated are often

irregular geometric shapes, forcing the estimator to use specific methods of calculation.

a. Describe why the method of cross sections is well suited for this type of work. (4 points)

b. Explain this method using the necessary illustrations (plan view, longitudinal and cross-

sections) and formulas. (6 points)


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Prepare a fixed price bid for the project described below; include the works performed by thegeneral contractor and the subcontractors.

Considering that:

a) Losses are 2 m³ for the concrete and 2% for the masonry blocks.

b) Choose the lowest bidder, if not, give a valid reason.

c) Use an analysis matrix in order to select the subcontractors.

d) The indirect costs of construction are $ 15000.

e) The company charges 15% for the administrative costs and profits.

f) Goods and Services Tax (GST) at the rate of 5% on the sale price.

g) The Quebec sales tax (QST) at the rate of 9.975% on the sale price excluding GST.

The work performed by the general contractor

Section / Activity Quantity Cost

3100 - Formwork (all inclusive)

Columns' Footings 70,00 m2 45,00 $/ m2

Foundation walls 240,00 m2 50,00 $/ m2

Columns 160,00 m2 65,00 $/ m2

Structural slabs 400,00 m2 55,00 $/ m2

3210 - Reinforcing steel supplying and preparing 1400,00 $/ t

3220 - Placing of Reinforcing steel (labor only)

Columns' Footings 0,6 tonne 15,00 $/ t

Foundation walls 1,6 tonne 20,00 $/ t

Columns 1,1 tonne 25,00 $/ t

Structural slabs 7,8 tonnes 20,00 $/ t

3310 - Concrete 30 MPA supplying 80,00 $/m3

3320 - Pouring concrete (labor only)

Columns' Footings 15,00 m3 10,00 $/ m3

Foundation walls 20,00 m3 15,00 $/ m3

Columns 10,00 m3 20,00 $/ m3

Structural slabs 65,00 m3 15,00 $/ m3

4000 - Masonry blocks 700,00 m2 40,00 $/ m2


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Submissions received by the subcontractors

Métallo For supplying all the metal frames and doors according to section "8100-a" for the amount of

$ 34 000.

Pierre Inc. To provide all materials, labor and necessary equipment’s’ to perform all the work of supplying

and installation of metals frames and doors in accordance to the sections "8100-a" and

"8100 b-. All for the amount of $ 60,000.

Poignées Inc. For supplying the doors hardware’s, according to section "8700" for the amount of $ 20 000.

Les Portes Inc. To provide all materials, labor and necessary equipment to perform all the work of installation

of metals frames and doors in accordance to the section "8100-b". All for the sum of $ 21 500.

Alpha métal. To provide all materials, labor and necessary equipment to perform all the work of supplying

and installation of wood doors in accordance to the sections "8300-a" and "8300-b. All for the

amount of $ 49 500.

Alumino Inc. To provide all materials, labor and necessary equipment to perform all the work of supplying

and installation of aluminium windows in accordance to the sections "8520-a" and "8520-b". All

for the amount of $ 40 000.

Candela Inc.To provide all materials, labor and necessary equipment to perform all the work of supplying

and installation of metals frames and doors in accordance to the section "8100-a" and "b-8100";

wood doors in accordance to the sections "8300-a" and "8300-b"; aluminium windows in

accordance to the section " 8520-a" and "8520-b"; doors hardware’s, in accordance to the

section "8700". All for the amount of $ 176 000.

At the last minute, you received the following information: Poignées Inc. increased its price by

$ 10 000. Do remedial work.

We ask you to:

1. Calculate the cost of work performed by the general contractor.


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2.

Calculate a combined cost for each of the following specialties:

- 3100 - Formwork

-

3210/3220 - Reinforcing steel supplying, preparing and placing -

3310/3320 - Supplying and pouring Concrete

3. Calculate a combined cost for each of the following elements:

- Columns' Footings

-

Foundation walls

-

Columns

-

Structural slabs

4. Calculate the cost of work to be performed by the subcontractors.

5. Calculate the total cost of your lump-sum submission including indirect costs,

administrative costs, profits and taxes.


A 5-storey hotel with a total area of 8400 m2 and a capacity of 120 rooms, cost

$ 12 552 000.00 $ in 2005.

a.

Determine the unit cost in 2005, using the method of floor area. (3 points)

b.

What will be the probable cost of construction if the total area was 6500 m2? (4 points)

c.

Determine the unit cost in 2005, using the method of the destination unit. (4 points)d.

Considering an annual inflation rate of 3%, calculate the probable cost of construction

for an 8-storey hotel with a capacity of 30 rooms per floor, which will be realized in

2015? (4 points)

Documents

14-CI-A7 - Version anglaise - Novembre 2014.pdf