1

2

Acknowledgement

In the past few weeks, we worked very hard to ensure the accomplishment of

this case study and learning as much as we can from this assignment. During

the process of accomplish this assignment, we are really blessed to have the

help and guideline of some respected individuals, who deserve our greatest

gratitude. The completion of this assignment gives us so much pleasure.

First and foremost, we would like to extend our gratitude to every single

member who has been participated and working hand-in-hand to complete

this assignment. With the valuable suggestions and open-minded personnel,

everything goes smoothly as how we wish to be. Without the cooperation

and effort of every member, this assignment will not be a success, and the

learning journey wouldn’t be so fun. We also like to thanks to our group

leader, Lee Pei Gie who always guided us along the assignment to make sure

that we are on track.

Besides, we would also like to expand our deepest appreciation to the

person in charge of PKNS Complex, Mr Mohd Khairul that giving us the

approval to visit the place and carry out our case study in the complex.

Last but not least, greatest gratitude to our lecturer, Dr Kam Kenn Jhun who

always advise and enlighten us when we seek for information, as well as

giving us the opportunity to extract knowledge through experience.

3

Abstract

Building services play important roles in every aspect of the building. Homes,

office buildings, industrial plants, schools, public and government facilities

and computer technology all rely on building services systems to create and

maintain safe, healthy and comfortable living and working environments.

Basically, the topics that are covered under this report is based on what we

had learnt during our lecture, which lays out different type of systems

adopted in PKNS Complex, analysis of the problem of systems as well as

suggestion and recommendation to further improvement of the system. The

case study about building services in PKNS Complex is based on four systems

which are fire protection system, mechanical and air-conditioning system,

vertical transportation system, and electrical supply system.

4

Table Content

1. Introduction of PKNS Complex

2. Discussion of Existing Systems

Fire Protection System

Electrical Supply System

Mechanical and Air-conditioning System

Vertical Transport System

3. Analysis on Problems

Fire Protection System

Mechanical and Air-Conditioning System

4. Recommendation of Solutions and Justification

Fire Protection System

Mechanical and Air-Conditioning System

5. Reference List

6. Appendix

5-6

7

8 – 18

19-21

22 – 31

32 – 39

40

41- 47

48 - 50

51

52 – 57

58 – 60

62 – 64

65 - 68

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PART 1

INTRODUCTION OF

PKNS COMPLEX

6

PKNS Complex PKNS Complex is one of the oldest commercial complexes that also houses

offices on the upper floors. It is a three-storied building with an open air,

sheltered food court on the rooftop.

As the first shopping center in Shah Alam, PKNS Complex is not a modern

shopping mall. There are hardly any high street shops. It's more of a bazaar

with small shops/stores/stalls. It's also definitely not a place for tourists. What it

is excellent for however, is during the month of Ramadhan, it'll be heaving

with stalls selling items for hari raya ( aidilfitri ). On the other hand, the

existence of the Selangor Immigration Office here also helps to cater the

crowd. It is the place to go for passport issues and Visas renewing.

Unfortunately, the newer malls such as SACC Mall, Alam Sentral and Plaza

Masalam are overtaking PKNS Complex in amount of patrons received.

Hence it indeed requires a lot of upgrading work to attract more patrons,

especially its building services which include mechanical and air-conditioning

system, vertical transportation ( escalator and elevator ), fire protection

system and electrical supply to buildings. This is why PKNS Complex is selected

as the subject of our case study as we see the potential area of improvement

in it.

7

PART 2

DISCUSSION ON

EXISTING SYSTEMS

8

Fire Protection System 1.0 Literature Review

The fire protection system plays a very important role to prevent the spread of

fire breakouts in buildings. The duty of the fire protection system is to

extinguish the fire and control the spread of fire. Besides, it also reduces the

impact of uncontrolled fire and to protect human life and state, public, and

private property from fire. There are two fire protection methods, which are

active fire protection method and passive fire protection method.

1.1 Active fire protection method

Active fire protection is the process of protecting a building or structure from

fire with methods that use the action of moving parts. (wisegeek, n.d.) These

systems can be automatic or manually such as fire alarm system, smoke &

heat detector, wet & dry risers, hose reels and CO2 fixed installation.

1.1.1 Fire extinguisher

Fire extinguisher is used to extinguish small or initial outbreak fires, often in

emergency situations. It is not intended for use on an out-of-control fire. It

should be located at conspicuous location. Typically, a fire extinguisher

consists of a hand-held cylindrical pressure vessel containing an agent which

can be discharged to extinguish a fire.

In PKNS Complex, the fire extinguisher can be found everywhere, within 20m

from a potential fire hazard. The type of fire extinguisher used in complex is

mostly ABC type dry powder fire extinguisher which is in blue colour. It is

effective on Class A, B and C fires.

Under UBBL 1984 Section 227 - Portable extinguisher shall be designed and

installed in accordance with MS 1539.

Figure 1.0 shows ABC type dry powder fire extinguisher which is in blue colour

9

1.1.2 External fire hydrant

A fire hydrant is a system of pipe work that allows water to flow from a water

main with the control of a valve in order to put out a fire. (wisegeek, n.d.) The

water is discharged into the fire engine from which it is then sprayed over the

fire.

The external fire hydrants found around the PKNS complex are two way fire

hydrants which are made up of cast iron. It is located not more than 10m

distance to the building, not more than 10m distance to high voltage

electrical mains and spaced not more than 90m apart along access road.

Under UBBL 1984 Section 225(2) - Every building shall be served by at least

one fire hydrant located not more than 45 meter from the fire brigade

access, designed and installed in accordance with MS 1489. In any case,

hydrants shall be located not more than 90 meters apart.

Under UBBL 1984 Section 225(3) - Depending on the size and location of the

building and the provision of access for fire appliances, additional fire

hydrant shall be provided as may be required by the D.G.F.R.

Figure1.1 shows external fire hydrant

10

1.1.3 Hose Reel

Hose reel systems intended for occupant to use during early stage of fire. It

consist of pumps, pipes, valves, hose reel tank and hose reels located

strategically in a building, ensuring proper coverage of water to combat a

fire.

In PKNS complex, the hose reel was sited in position where they can be used

without exposing user to danger from fire. The system is manually operated

and activated by opening a valve enabling the water to flow into the hose

that is typically 30 meters away.

Under UBBL 1984 Section 226A - Hose reel systems shall be designed and

installed in accordance with MS 1489.

Figure 1.2 shows fire hose reel

11

1.1.4 Water storage tank

In PKNS complex, water supplied from a designed water tank (16m3) located

at roof level. The tank is made up of pressed steel and the external surface is

painted with a red band of minimum 200mm. It has two compartments which

is compartment 1 and 2. Besides, level indicator is also provided.

Figure 1.3 shows water storage tank

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1.1.5 Wet riser

Wet Riser Systems are installed in buildings for fire fighting purposes which are

permanently charged with water from a pump source. (protec, n.d.) It

required when topmost floor of building is higher than 30.5m and lower than

70.5m above the fire appliance access level. Water supply shall be capable

of maintaining a running pressure of 410kPa at the highest landing valve and

give a flow rate of 2.3 I/s.

PKNS Complex is a three-storied building which is less than 70.5m. Therefore, it

uses wet riser as internal fire hydrant. It is installed completed with an inlet

breeching connector at ground floor or and with landing valves at specified

points on each floor. Besides, air release valve is automatically open to

release air and closes when the riser is full of water.

Under UBBL 1984 Section 231(1) - Wet rising systems shall be provided in every

building in which the top most occupied floor is more than 30 meters above

fire appliance access level.

Figure 1.4 shows wet riser

13

1.1.6 Sprinkle system

A sprinkler system is integrated system of piping work, connected to a water

supply, with listed sprinklers that automatically initiate water discharge over a

fire area. Where required, the sprinkler system also includes a control valve

and a device for activating an alarm when the system operates.

In PKNS complex, there are a lot of sprinkler heads. Every sprinkler head has a

small glass bulb with a glycerine-based liquid in it. This bulb normally blocks

the flow of water. In a fire, the liquid in the bulb will become hot. It will then

expand, and shatter the glass bulb, removing the obstacle and causing

water to spray from the sprinkler. (Understand building construction, n.d.)

Water will continue to flow until the main valve is shut off. The most common

temperature that is designed to break is approximately 68°C/155°F.

Under UBBL 1984 Section 228 - Sprinkler systems shall be designed and

installed in accordance with MS 1910.

Figure 1.5 shows sprinkle system

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1.1.7 Fireman’s switch

A fireman’s switch is an electrical isolation switch located beside the top

edge of the lift to permit the disconnection of electrical power supply to the

relevant floor or zone served. (Arsyad, 2011) Besides, it is to cut down the

supply of electrical services to the shop when the fire exists. This is to avoid the

electric current over flow to cause explosion. In PKNS complex, the fireman’s

switch is placed in a conspicuous and accessible location which not more

than 2.75m from the ground. Besides, it is painted in red colour and mounted

onto the wall.

Figure 1.6 shows fireman’s switch

1.1.8 Manual call point

Manual alarm call points are designed for the purpose of raising an alarm

manually once verification of a fire or emergency condition exists, by

operating the push button or break glass the alarm signal can be raised.

(Crouse-hinds, n.d.) In PKNS complex, it uses break glass call point. It is

installed at a height of 1.2m above floor level and sited where user can be

easily seen. Besides, it is fitted on the floor side of an access door to a

staircase so the floor of origin is indicated at the Control Panel. Moreover, the

greatest travel distance from any point in the building to the nearest call

point does not exceed 30m. (Fire safety advice centre, n.d.)

Figure 1.7 shows manual call point

15

1.1.9 Fire alarm bell

The primary function of a fire bell is to alarm people who are at risk to take

the necessary precautionary safety and evacuation measures. (Fest fire

security, n.d.) Fire bells are relatively loud and also designed to produce a

specific and unique sound pattern with the intention of eliminating confusion

to successfully warn for hazards. In PKNS complex, the fire bell is installed

throughout the building with an even distribution.

Under UBBL 1984 Section 237 - Fire detection and fire alarm systems shall be

designed and installed in accordance with MS 1745.

Figure 1.8 shows fire alarm bell

1.1.10 Smoke detector

A smoke detector's initial function is to detect that fire is present. There are

two types of detectors which are ionized smoke detector and light scattering

smoke detector. In PKNS complex, smoke detector is mounted on the ceiling.

When smokes enter the unit, it will reduce current which energies alarm relay

and obstruct the light passing through. Therefore, it will trigger the alarm bell

to give signal for the occupants to escape.

Figure 1.9 shows smoke detector

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1.1.11 Voice communication system

An emergency voice communication system allows the fire-fighting team to

communicate critical information and to notify the building occupants of the

need for action in connection with a fire or other emergency. In PKNS

complex, emergency telephone handsets are securely mounted on the wall

and coloured in red. It is used as two-way communication system. It is a

network of telephone handsets located at designated area of the building

and connected to the master handset at the Fire Command Centre. (Fire

safety and protection systems, n.d.)

Under UBBL 1984 Section 239(a) - There shall be two separate approved

continuously electrically supervised voice communications system, one a fire

brigade communications system and the other a public address system

between the central control station.

Figure 2.0 shows “Telefon Bomba Api”

17

1.2 Passive fire protection method

Passive fire protection method is an integrated component of the structural

fire protection and fire safety in a building. It attempts to contain fires or slow

the spread, through use of fire-resistant walls, floors, and doors. Besides,

passive system must comply with the associated listing and approval of use in

order to provide the effectiveness expected by building codes.

1.2.1 Fire door

In PKNS complex, the passive system that we found is fire door which allows

the flow of traffic around the building. Fire doors have two important

functions in the fire incident which are to act as a barrier to stop the spread

of fire when the door is closed and to provide an escape route for occupants

to escape when the door is opened. (Fire safety advice centre, n.d.)

Under UBBL 1984 Section 163 - Fire doors including frames shall be constructed

in accordance with MS 1073.

Figure 2.1 shows fire door

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1.2.2 Fire escape route

A fire escape is a type of emergency exit. It usually provides a directional exit

signs for occupants to leave for a safe place immediately. It is usually

mounted to the outside of a building or occasionally inside but separated

from the main areas of the building. In PKNS complex, the fire escape plan is

located beside the lift for showing these escape routes.

Figure 2.2 shows fire escape route

1.2.3 Staircase and compartment

In PKNS complex, the fire escape staircase is being properly designed to

meet the requirement of UBBL 168 part 8. This can be proved by the number

of riser per flight are not more than 16, tread & riser dimensions are

consistence, no winders in escape staircase and the length of the landing is

not less than width. Besides, the building is sub-divided into compartment by

using compartment walls and compartment floors. The period of insulation

should not less than 15 minutes.

Under UBBL 1984 Section 168(4) - The required width of a staircase shall be

maintained throughout its length including at landings.

Figure 2.3 shows staircase and compartment.

19

Electrical supply system 2.0 Literature Review

Generator output at 25kV is stepped up by transformer to 400kV, 275kV and

132kV for transmission. In PKNS complex, transmission main intake is the

interconnection point of 132kV to the distribution network.

Figure 2.0 shows Tenaga Nasional Berhad

2.1 Main Switch Board

Switchboards consist of various electronic apparatus that are used to

operate electric circuits. The function of a switchboard is to transmit

electricity from one source to another. (Stein, n.d.) In PKNS complex, the main

switch board is located at the ground floor. It is totally enclosed and sheet

steel fabricated.

Figure 2.1 shows Main Switch Board

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2.2 Service entrance

Service entrance is a service that allows the electric to flow to the building.

Before the electric is transmitted to the building, electric will pass through the

meter equipment and a device for overcurrent protection and electrical

current control to avoid the occurrence of overcurrent.

Figure 2.2 shows service entrance

2.3 Branch circuit

Branch circuit is a metal box that filled with switches and mounted on the

wall. The purpose of the branch circuit is to supply the power to the electrical

devices in the shops. Besides, it can also cut off the power when it is switched

off. The device can cut off the power without affecting the power supply of

the whole building. This is useful when there is any fire occurrence or the

performance of maintenance in the building.

Figure 2.3 shows branch circuit

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2.4 Miniature Circuit Breaker (MCCB)

Miniature circuit breakers (MCB) are designed to protect cables and lines

against overload and short-circuit. They thus used for protecting the electrical

equipment against excessive temperature rise and destruction in the event of

short-circuit. (Edvard, 2012)

Figure 2.4 shows miniature circuit breaker

2.5 Conduit

An electrical conduit is a tube that used to protect the cables from physical

damage and heat. Besides, it also provides continuous support. PVC

electrical conduit is very light weight, high strength, low cost and resistance

to more chemicals. In PKNS complex, we have found some electrical conduit

elbow mounted on the wall.

Figure 2.5 shows electrical conduit elbow

22

Mechanical and Air Conditioning

System

3.0 Literature Review

Ventilation is the process of exchanging or replacing air in any space to

provide high indoor air quality, which involves temperature control, oxygen

replenishment, and removal of moisture, odors, smoke, heat, dust, airborne

bacteria, and carbon dioxide. Ventilation removes unpleasant smells and

excessive moisture, introduces outside air, keeps interior building air

circulating, and prevents stagnation of the interior air.

Ventilation includes both the exchange of air to the outside as well as

circulation of air within the building. It is one of the most important factors for

maintaining acceptable indoor air quality in buildings. Methods for ventilating

a building may be divided into mechanical or forced and natural types.

The case study building that we have chosen which is PKNS Complex. There is

one type of ventilation occurring in this building, which is mechanical

ventilation by use of fan and air conditioning system. In this section, this type

of ventilation will be analyzed and scrutinized.

3.1 Mechanical Ventilation

Mechanical ventilation is a building ventilation system that uses powered fans

or blowers to provide fresh air to rooms when the natural forces of air pressure

and gravity are not enough to circulate air through a building. Mechanical

ventilation is used to control indoor air quality, excess humidity, odors, and

contaminants that can often be controlled via dilution or replacement with

outside air. However, in humid climates specialized ventilation systems can

remove excess moisture from the air.

3.1.1 Mechanical Fan

We observed that PKNS building utilizes ceiling fans as well as wall mounting

fans to circulate air within the space. These air-circulating fans are commonly

seen as ventilation systems as they are usually the most visible mechanical

23

system in a building. However ceiling fans do not provide real ventilation, as

there is no introduction of fresh air. Ceiling fans only circulate air within a

space for the purpose of reducing the perceived temperature by method of

evaporation of perspiration on the skin of the occupants.

Figure 3.1. 1(a): Ceiling Fan Figure 3.1.1(b): Wall Mounting Fan

3.1.2 Ventilation Ducting System

At every floor of this building, there is exposed ceiling with ductworks. These

ductworks are called flexible ductworks, which are lightweight and fairly

quick and easy to install. This type of ductwork often cost less than the rigid

ductwork. The presence of ducting indicates that PKNS Complex utilizes

centralize system as major part of their air conditioning system. The chilled air

is passed through the ducting system to various parts of the building.

The ductworks in PKNS building are insulated with fiberglass in order to avoid

losing valuable conditioned air. The fiberglass surface faces in toward the

duct, while the foil face protects the outside of the wrap, preventing

conductive heat loss and protecting the fiberglass within. Insulation is applied

to ductwork to enhance thermal performance and prevent condensation

and dripping.

In this building, duct thermal performance needs enhancement since air

transported through a supply duct is at a temperature different than that of

the surroundings. Insulation reduces the rate of thermal loss to those

surroundings. Without insulation, the air would need extra heating or cooling

in order to arrive at the design supply air temperature.

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Figure 3.1.2 (a): Ducting system in the building

3.1. 3 Cooling Tower

PKNS Complex utilizes centralized system as the air conditioning system,

hence there is a cooling tower, which is a specialized heat exchanger in

which air and water are brought into direct contact with each other in order

to reduce the water's temperature. As this occurs, a small volume of water is

evaporated, reducing the temperature of the water being circulated

through the tower.

Cooling towers is located on the roof of PKNS building because of the noise

and vibration they generate, the tower should be isolated acoustically from

the frame of the building and noise sensitive areas such as auditorium and

meeting room should not be located directly below them.

25

Figure 3.1.2.3(a): Cooling tower

Figure 3.1.2.3(b): Details of cooling tower

Source: http://cset.mnsu.edu/engagethermo/components_coolingtower.html

3.1.4 AHU Room

The Air Handling Unit is an integrated piece of equipment consisting of fans,

heating and cooling coils, air-control dampers, filters and silencers. Air

Handling Units are often called AHU. The purpose of this equipment is to

collect and mix outdoor air with that returning from the building space. The

air mixture is then cooled or heated, after which it is discharged into the

building space through a duct system made up of five-feet diameter pipes.

Air Handler is normally associated with heating/cooling (HVAC) systems in

commercial buildings. These are normally very large systems moving 2000

CFM to 10,000 CFM and higher. They often have an economizer or inlet

damper that allows for a small amount of outside air or make-up air to be

pulled in through the air handler.

26

The AHU room in PKNS building is located in a large mechanical room. The

size of the mechanical room is usually proportional to the size of the building.

As PKNS is considered a large building, so its mechanical rooms can be of

considerable size, which requiring multiple rooms throughout the building.

In this building, the AHU connects to the ductwork that distributes the

conditioned air throughout the areas of the building and the warmed air is

returned to the AHU room to be cooled after going through the cooling coil

and filter. The chilled water from the cooling coil taken from the cooling

tower is supplied and returned in blue pipes.

Figure 3.1.4(a): AHU room of the building

Figure 3.1.4(b): Details of AHU room

Source: http://www.electrical-knowhow.com/2012/03/in-previous-air-conditioning-system.html

27

3.1.5 Air Door

PKNS Complex installed air doors at every entrance or customer entryways.

They can be intended to help keep flying insects out by creating forceful

turbulence, help keep out outside air and prevent loss of cool air, thus

reducing infiltration through the opening.

Air doors work best when the pressure differential between the inside and

outside of the building is as close to neutral as possible. The air door for

containing conditioned air inside this building with an open door will have a

high face velocity at the opening, generated by top-down flow, and air

recovery by a recirculating air plenum and duct return to the source fans.

In the operation section, the air door is most effective with low exterior wind

velocity. At higher wind velocities, the rate of air mixing increases and the

outside air portion of the total face flow increases. Under ideal conditions of

zero wind, the effectiveness of the air door is at its maximum. In windy

locations, air doors cannot create a perfect seal, but are often used to

reduce the amount of infiltration from an opening.

Figure 3.1 5(a) & 3.1.5(b): Air door located at the entrance

28

3.1.6 Air Supply Diffuser

A diffuser is the mechanical device that is designed to control the

characteristics of a fluid at the entrance to a thermodynamic open system.

Diffusers are used to slow the fluid's velocity and to enhance it’s mixing into

the surrounding fluid.

Diffusers are very common in heating, ventilating, and air-conditioning

systems. Diffusers are used on both all-air and air-water HVAC systems, as part

of room air distribution subsystems, and serve several purposes which are to

deliver both conditioning and ventilating air, evenly distribute the flow of air in

the desired directions and to enhance mixing of room air into the primary air

being discharged. In addition, they often to cause the air jets to attach to a

ceiling or other surface, to create low-velocity air movement in the occupied

portion of room and accomplish the above while producing the minimum

amount of noise.

Through observing the building, we found out there are two types of diffusers

that use in this building which are cone diffusers and 4-ways louver bladed

diffuser.

One of which is the cone diffuser, which is mounted on the ceiling especially

in installation when an adjustable pattern is required. Cones can be taken

out by pushing inward, turn around and pull down. This provides easy

installation, maintenance and access to the duct. Discharge pattern of this

cone can be adjusted for horizontal flow by extending the cones and for

vertical flow by retracting the cones, which can cool the space of various

parts of the building for users’ comfort.

Figure 3.1.6(a): Cone Diffuser

29

Flow Pattern of Cone Diffuser

Figure 3.1.2.5(b): Horizontal air pattern

Source: http://www.airmasteremirates.com/products_details.php?product-

id=47

Horizontal air pattern

• Pattern is obtained by extending the cones downwards. • This arrangement handles more capacity of air with increased induction

and uniform air distribution.

Figure 3.1.2.5(c): Vertical air pattern

Source: http://www.airmasteremirates.com/products_details.php?product-

id=47

Vertical air pattern

• Pattern is obtained by retracting the cones upwards. • Air is delivered vertically without much induction.

• Suitable for localized cooling in conditioned area and for higher altitudes.

30

Whereas, the 4-ways louver bladed diffusers are mounted on the ceiling as

well, which provide excellent diffusion performance and are suitable for

surface mounting in plasterboard ceilings or lay-in ceiling grids. The

removable core, via a positive center screw, makes them easy to install,

clean and access any dampers located behind the diffuser. This louver faced

ceiling diffuser is suitable for use in this building where cooling is required in

areas of high heat and high humidity, and also to suit heating and cooling

applications in cooler temperatures.

Figure 3.1.6(b): Flow pattern of diffuser

Source: http://www.airmasteremirates.com/products_details.php?type=diffusers&sub=20&product-

id=37

Figure 3.1.6(c): 4-ways louver bladed diffuser

3.1.7 Air Return Diffuser

Through observing the building, we found that PKNS Complex installs return air

diffusers attached to the wall as well as mounted on the ceiling. This return air

grille connects to ductwork that allows air to return to any cooling or heating

system. The openings that connect to ducts and other spaces for the

returning air are covered with grillwork.

31

Every cooling or heating system will have air being pushed through into

various parts of this building and spaces through a system of ducts. This

increases the air pressure in the conditioned area and at some time will act

to even prevent any further air from entering unless a circulating system is set

up to relieve the pressure. This is done normally through return ducts, which

allow the air to be recirculated or completely vented to the outside. This

return air grill covers such ducts, and can also act to regulate the flow of air.

They also act to close off the ducts from view. This return air grill also has a

filter mounted on it to trap particulate matter and thus ensure that the

recirculated air is more pure. This can also in the long run reduce the amount

of cleaning required for ducts.

Ducts for returning air are located at every floor level or in the walls. These

require to be covered by a grill that will ensure that duct is protected. It is

considered very necessary to use filters over such grills, which in turn can lead

to higher efficiency in cooling or heating. The filters in a way also help to

reduce airflow and thus help improve efficiency. Such filters can have

increased ratings, which in turn can reduce allergens and dust and thus

make the circulated air more healthy.

Figure 3.1.7(a) & 3.1.7(b): Return air diffusers in the building

32

Vertical Transportation System

4.0 Literature Review

Vertical transportation is a phrase used to describe the various means of

travelling between floors in a building. All buildings with more than one storey

of course have at least one set of stairs and the provision of stairs is a very

important consideration when designing buildings in order to ensure all the

occupants of the building can escape safely in the event of a fire.

In buildings with more than four storeys, a lift commonly known as an elevator

is desirable as there is a limit to how far people are willing to walk up stairs. In

addition to this, stairs are unsuitable for infirm and mobility impaired persons

so buildings with only two storeys are sometimes fitted with a lift. A third option

is the escalator which is ideally suited for high volume applications such as

shopping malls and airports but not practical for high rise buildings as they

take up a lot of space.

We observed that PKNS Complex consists of escalators and elevators as the

mean of vertical transportation. Both of these vertical transportations play a

vital role in this building to provide an accessible path, leading from one level

to another.

4.1 Escalator

An escalator is a moving staircase, which a conveyor transport device for

carrying people quickly and efficiently between floors of a building. The

device consists of a motor-driven chain of individual, linked steps that move

up or down on tracks, allowing the step treads to remain horizontal.

Escalators have the capacity to move large numbers of people, and they

can be placed in the same physical space as a staircase. They have no

waiting interval except during very heavy traffic, they can be used to guide

33

people toward main exits or special exhibits, and they may be weather-

proofed for outdoor use.

PKNS Complex utilizes the only one type of arrangement of escalator, which is

double bank in two travel direction. This arrangement is used in the objects in

which persons travel in two opposite direction and it normally use in major

department stores where transportation time between several levels should

be kept to a minimum. The escalator in this building is located at the center

of ground floor and second floor, which can be easily seen by the users.

The speed of the escalator in PKNS Complex is between 0.45m/s to 0.60m/s.

The step width of escalator is about 1000mm, which allow for two people to

stand side by side and to step on the escalator.

Figure 4.1(a): Step width of escalator

Figure 4.1(b): Escalators in double bank in two travel direction

Width

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Figure 4.1(c): Arrangement of escalators in double bank in two travel

direction

Source: http://www.gmv.pl/eng/moving-walks.html

Figure 4.1(d): Components of escalator

Source: http://www.electrical-knowhow.com/2012/04/escalators-basic-components-part-two.html

4.2 Elevator

An elevator is a type of vertical transportation that moves people or goods

between floors, levels and decks of a building, vessel, or other structure.

Elevators are generally powered by electric motors that either drive traction

35

cables or counterweight systems like a hoist, or pump hydraulic fluid to raise a

cylindrical piston like a jack.

In PKNS building, there are three fire fighter lift and three electric lifts. The fire

fighter lift is a lift within the firefighting shaft with dual power supply and is

capable of being commandeered by the Fire Service. On the other hand,

the electric lift uses cable to lift the car and movement is depending on the

electrical power. The major components of an electric car are, motor or

machine room, hoistway and pit, lift car and landing.

The elevators can support up to 800kg, which is 11 people or users can go in

at one time. The speed of these elevators is between 100-150 feet per minute,

which is suitable for normal speed of elevator. If the speed of elevator is too

fast, it will result in a nervous breakdown to the users. If too slow will cause

lack of function of the elevator.

Figure 4.2(a): Fire escape plan that showed the location of fire fighter lifts

and electric lifts

Fire Lift and

Electirc Lift

Fire Lift and

Electirc Lift

36

Figure 4.2(b): Electric lift

The UBBL requirements:

1. Under UBBL 1984 Section 123-128, lifts:

124 - For all non-residential buildings exceeding 4 stories above or

below the main access level at least once lift shall be provided

2. Under UBBL 1984 Section 152-155, Ventilation to lift shafts:

152(1) - Every opening in a lift shafts or lift entrance shall open into a

protected lobby unless other suitable means of protection to the

opening to the satisfaction of the local authority is provided. These

requirements shall not apply to open type industrial and other special

buildings as may be approved by the D.G.F.S

37

4.2.1 Elevator Lobby

In the PKNS building, elevator lobby controls and indicators shows the two

items required in an elevator lobby, which are the call buttons and the hall

lanterns or position indicator.

Figure 4.2.1(a): Elevator lobby located at ground floor

Call Buttons are used to request an elevator. They are mounted above the

finished floor and consist of an up button and a down button that illuminates

to indicate the request has been received and an elevator is on the way.

Whereas, hall lanterns or position indicators are used to indicate the arriving

elevator and the direction it will travel. In addition to the illuminated

directional indicators, the hall lanterns have an audible tone to indicate

direction. Audible signals sound once for elevators going up and sound twice

for elevators going down. Alternatively, vocal indicators may say, "going up"

or "going down" in lieu of tones.

Hall Lantern

Hall Lantern

Call

Button

38

Figure 4.2.1(a) & 4.2.1(b): Exterior & interior view of elevator on the third floor.

Figure 4.2.1(c): Single speed centre-opening and the movement of door is

quite and fast

4.2.2 Inside the Electric Lift

The electric lift in this building is equipped with lighting and ventilation fan,

which provide a bright and comfort condition for the users in the elevator.

In the elevator, there are information display and indicator. The controls

inside the elevator cab vary widely based on the types of services the owner

wants to place on the control panel. However, the elevators in this building

consist of floor selection buttons and operation and emergency buttons.

Floor Selection Buttons are used to select floors that the elevator will stop at.

Operation and Emergency Buttons are offset below the floor selection

39

buttons. These buttons include door open, door close, emergency stop and

emergency alarm. All these button panels are clear and easily reached at

appropriate level.

Figure 4.2.2(a): Lighting and ventilation fan in the elevator

Figure 4.2.2(b) & 4.2.2(c): The controls inside the elevator cab

40

PART 3

ANALYSIS ON

PROBLEMS

41

Problems of Fire Protection

System 1.0 Active Fire Protection

1.1 Fire Alarm System

Although fire alarm trigger system can be seen all over the building but

whether it is in functioning condition is another question. For example,

majority of the manual call point devices are not in operating condition.

There are writings on most of the manual call points indicating that the

device is not working. Besides that, even the ones without writings seem to be

very old and warn out which put many in doubt whether is it working or not.

One more thing that the alarm system lacking is a visible indicator alarm

signal which one of the requirement stated in UBBL 241. The system will be

able to notify deaf occupants when a fire arises in the building.

Old and worn out.

Only a few of the old

alarms were replaced by

new ones.

42

1.2 Voice Communication System

The voice communication system is the last thing to rely on if a fire really arises

in the building as the whole system is not functioning at all. The command

and control centre is closed and looked abandoned when we were there.

Hence, we assume that they do not rely on this protection system during a

fire. However, even if the communication system is still functioning, the

telephone for users to contact the control centre looks very dirty and faulty

from the outside. The box containing the phone is also locked and

inaccessible. Hence, the occupants in the building will have a hard time

notifying the authorities when a fire really occurs.

With the building not operating the voice communication, it violates the

requirement of UBBL 239 part 3 where it states that voice communication

system is required in every office area exceeding 92.9 square metres in area.

Besides it also violates the requirement of UBBL 238 for not having a

command and control system in such a big building.

Telephone for users to contact

the control centre looks very

dirty and faulty

There is no key to access the

telephone in it.

The command and control centre which is closed

and looked abandoned

43

1.3 Fire Extinguisher

Fire extinguishers can be found at almost every corner of the building. For

instance near corridors, room exits, stairways, and near fire hazard areas such

as restaurant. The service of the extinguishers are also always up to date.

However, there are some fire extinguishers that are not kept properly but

instead it is just left unsecured and some even just on the ground. This could

be dangerous as children can easily have access to it.

Besides that, some of the boxes containing the fire extinguishers are lock and

the access key which is supposed to be within the glass is nowhere to be

found. Thus, occupants will struggle to put out fire near them and could

cause fatal injuries to the victim involved.

Glass is

broken

No access key.

44

1.4 Sprinkler System

The Sprinkler system of PKNS Complex is very poorly maintained. Almost

every visible sprinkler is covered with a thick layer of dust. The

accumulation of dust and other contaminates can result in a false alarm

to occur. This result in fire trucks coming for no reason and it might also

disturb the operation within the building.

Moreover, there are even some sprinkles then are badly corroded. Corrosion

of fire system pipes will impact the functionality of the system and also result

in leakage. Therefore, annual inspection of fire sprinkler system should carried

out.

Corroded Sprinklers

Sprinklers covered with dust

45

2.0 Passive Fire Protection

2.1 Fireman Lift

A fireman lift is required in a building if the top most occupied floor is over

18.5m. The PKNS Complex has 5 floors and assuming each floor is 4 meters

high, there should be a fireman lift included in the elevator system. According

to the building floor plan there are three firemen lift located at each floor but

the size of the firemen lift is just as big as the normal electric lifts. There is also

no signs indicating that which lift in particular is a firemen lift. Not just that, the

normal lift for occupants are also very small in size, if firemen were to use that

lift during a fire, it will be very inconvenient.

No signs indicating which is the firemen lift. Lift with small capacity

Fire Lift and

Electirc Lift

Fire Lift and

Electirc Lift

Fire escape plan that showed the location of fire fighter lifts and electric lifts.

46

2.2 Escape Route

The diffusers of the staircase pressurization system are covered with a very

layer of dust. As time passes if nothing is done to clean the diffusers, dust will

eventually clot the diffusers and the staircase will not be pressurized.

In addition the fire doors handle lockset at the staircase are in poor condition.

We struggled to open a few of the fire doors leading to the emergency

staircase as the lockset were faulty. This would be crucial if occupants of the

building were to escape the building during a fire.

Diffusers covered with a lot of dust

Fire door with broken lockset

47

3.0 Conclusion

Overall the fire protection system of PKNS Complex is actually well

equipped but at the same time very poorly maintained. For example, escape

routes can be easily spotted at all corners of the building, hose reels and fire

extinguishers are very visible, water sprinklers are everywhere as well, there

are also fire alarms and voice communication system to notify others in case

of fire but whether all these systems are in working condition or properly

maintained is the main problem. The amount of problems mentioned above

could cause many lives.

Therefore, the service management of the building really have to put in

a lot of effort in maintaining the fire protection system as it might come in

handy one day.

48

PROBLEMS OF MECHANICAL AND

AIR-CONDITIONING

1.0 COOLING TOWER

Cooling tower is one of the main components that help to extract heat from

the cold air through lowering the temperature of water stream. The main

problem as shown in this cooling tower is leaking.

If the leakage from the cooling

tower is not properly maintain, it will

affect the distribution of the cool air

through the ventilation system in the

PKNS complex. Besides that, the

water from the cooling tower flow to

nearby electrical cabling that can

cause short circuited and causing

danger to passer-by or

maintenance workers who walk by

this area.

WATER LEAKAGE WATER LEAKAGE

49

On the other hand, for the second

cooling tower which is located at the

middle of the PKNS complex, the louvre

of the cooling tower is already corroded

and does not function well. This is one of

the ventilation problem happening at

ground floor level.

2.0 FAN

Due to the air-conditioning in ground

floor is malfunction, they have install fan

as the main ventilation. The odor of this

place is badly maintained due to poor

ventilation making less customers less

inclined to pass through the area. The

place is also humid making the

customers or people working there

feeling hot and sweating.

Big fans are attach at the edge of floor

slabs between ground floor and first floor.

Some of the big fans have dust

accumulated on its fan blades. This will

make the customers to sneeze continuously

due to allergies to the dust particles. The

management team will have to

continuously maintain the fan since fan is

the only available mechanical system. It

can be costly to keep the atmosphere dust

free.

50

3.0 AHU DOOR UNABLE TO CLOSE PROPERLY

The Air handling unit door cannot be close fully and if there is any fire

occurring in this building the fire can easily spread through the ahu room due

to an uneven gap shown in the picture above. This can lead to undesirable

explosion happening when fire occurs when affected by pressurized tank in

the AHU room.

The ducting on the ceiling is not

properly replaced. As a result, it allows

the ducting to be exposed. It might

cause the failure of performance in

ducting systems to supply ventilation.

Gaps between the doors

51

PART 4

RECOMMENDATION

OF SOLUTIONS AND

JUSTIFICATIONS

52

RECOMMENDATION AND

JUSTIFICATION ON IMPROVING

FIRE PROTECTION SYSTEM 1.0 Active Fire Protection

1.1 Fire Alarm System

A fire alarm system is number of devices working together to detect and

warn people through visual and audio appliances which may be activate

when smoke, fire, carbon monoxide or other emergencies are present.

Hence, it is necessary to improve the system for safety purpose.

First and foremost, the employees of the complex have to stay alert if there is

any broken system immediately to prevent it from not functioning during an

event of fire which will cause loss of lives within the complex. The volume of

the siren may be increased when the fire alarm system is activated due to

the reason that many fire alarm systems have a mute or hush button to

silence the sounding alarm or lower the volume of alarm which could cause

further alerts to be missed by the people in the complex. They cannot even

determine where is the sound of the alarm comes from. Hence, if the volume

of siren is increased, the occupants can clearly hear the directions that are

being given.

Some frequent maintenance should also be carried out such as battery

changing and cleaning it to make it free from dust. It is important that the

employees of the complex should never leave the alarm unusable as they

are often the first alert to a fire. Besides decreasing the distance between

alarms, the quantity of fire alarm system within the complex may also be

increased. If there is an event of fire, it would take a long time for the

occupants to hear the fire alarm which the valuable escape time would be

lost because of this. Hence, the distance between alarms should be reduced

so that occupant can hear the alarm whenever they are within the complex.

Lastly, the quantity of fire alarm should be increased as if some fire alarms are

broken down, at least there are a few more still can carry out its function in

the case of emergency.

53

1.2 Voice Communication System

A fire voice communication system is designed to announce an emergency

message when there is fire to all the people within the complex in order for

them to escape immediately.

The voice communication system can be improved by frequent testing and

maintenance to ensure it can be functioned as a common problem in fire

safety is not the lack of equipment but the ignorance of maintaining them.

Hence, be strict when it comes to maintaining and servicing to prevent it out

of service during an event of fire.. The employees from control centre can

prepare more spare keys which can access the telephones for users to

contact the control centre as the size of key is usually small which could be

lost easily.

The telephone should also be cleaned frequently so that it would not be

covered with dust or unwanted rubbish which may hiding them away or

mixing them with other items and lead to the confusion for people in the

complex in the case of emergency. The employees have to ensure that the

connection line of control centre is still working because it could assist to

contact fire fighters during emergencies in the complex where radio

communication cannot be guaranteed to work due to interference from the

fire corona.. Lastly, the command and control centre should be reopened so

that they can receive information from the occupants when there is an event

of fire for them to contact the fire fighters immediately without delaying the

time.

54

1.3 Fire Extinguisher

A fire extinguisher is an active fire protection device which used to extinguish

or control small fires in emergency situations.

The ways to improve the fire extinguisher included asking the employees of

the complex to test the extinguisher during annual fire protection inspections

to ensure that it can be functioned because the extinguisher would have

easily been knocked and damaged. All the employees should have training

lesson on how to use the fire extinguisher correctly so they can use it to

prevent the spread of fire in the case of emergency so that a fire can be

tackled without delay. In addition, the employees have to ensure that the fire

extinguishers are always in place with accessible keys beside as recorded in

the fire safety log book. Although it may only take a few seconds to remove

the blockage on the extinguisher, but every second is vital in the event of a

fire. Hence, the access to fire extinguishers must never be restricted and they

should be sited in highly visible locations not hidden in a corner.

Unfortunately, all fire extinguishers will expire after a few years no matter if

they have been used or not. Due to this reason, the date of issue in their label

of the extinguisher should be checked frequently. If they are out of date, they

are useless and the employees need to replace them. Lastly, It is also highly

recommended to check fire extinguishers’ hose. If there are any signs of

breakage, holes or cracks, the extinguisher must be replaced. Hence, the old

model of fire extinguisher should be upgraded to the latest model.

55

1.4 Sprinkler System

A sprinkler system is a water supply system which provides adequate pressure

and flow rate to a water distribution piping system.

The system can be improved by increasing the water volume that can be

spread out from the sprinkler. The pumps that bring water into the building

should be modified to ensure that the volume of water increases and it

should have access to an adequate water supply and ready access to a fuel

supply, whether diesel or electric. The sprinklers should be cleaned frequently

as when the maintenance and building work is being carried, the dust and

trigger or clog the sprinkler head and these should be removed immediately

when the work is finished because they may block the sprinkler head.

The old rusted sprinkler should be replaced to a new one as they cannot be

repaired or cleaned either and must be replaced completely. Due to the

reason of sprinkler heads have valves inside them that break when they

reach a certain temperature so when the sprinkler is rusted, this can interfere

with the valves or even stop them breaking altogether. some frequent

checking of the condition of the piping system of sprinkler should also be

carried out as closed sprinkler valve is the most common cause of failure in a

sprinkler system. The valve gets turned off for maintenance and it is not turned

back on, or a building worker twists it for some reason, not knowing whether it

is open or closed.

Lastly, the sensitivity of sprinkler should be tested and maintenance is required

for broken sprinkler. Hence, the valves, including those that supply water to

the building, should be checked weekly to ensure they are open, and a full

flow test should be conducted at least yearly.

56

2.0 Passive Fire Protection

2.1 Fireman Lift

A fireman lift is a type of elevator which enables fire fighters to use in order to

rescue people who may be trapped on upper floors during an event of fire in

the complex.

A fireman lift should be identified by placing a sign stated ‘FIREMAN LIFT’

because the obfuscating signage in any way will make this more difficult for

people who are not familiar with the layout of the building which will cause

the misuse of lift in the case of emergency. The size of the fireman lift should

be enlarged to ensure more fire fighters can be sent to upper floor to control

the fire spread the save the occupants who are trapped in the fire.

Moreover, the velocity of the lift should be slightly increased to reduce the

time taken for fire fighters to stop the spread of fire on the upper floor.

As with all fire safety equipment, it is important to make sure installation and

maintenance are carried out properly and thus, the maintenance of fireman

life should be done frequently to prevent it from not functioning during an

event of fire which will cause the delay in time for fire fighter to save lives. A

fire resistance coating can also be applied for internal and external wall

surface of the lift which can form a barrier to stop the spread of fire in order

to send the fire fighter to upper floor should also be done to prevent the

ingress of smoke around the lift edges.

57

2.2 Escape Route

Escape route is a path to exit the complex when there is an event of fire.

The escape route can be improved by providing the diagrams to show the

route to escape at the announce board in the complex as fire exit signs

should be clearly visible and located at each point of the escape route

where the direction changes. In the event of a fire, well displayed signs can

quickly guide everyone to safety. The diffusers should be cleaned weekly by

the cleaner because the build of residues inside diffuser such as grease and

dust which combined with heat can cause serious life-threatening fires. Other

than this, if the diffuser could not function well, it may provide more oxygen to

keep a fire burning for longer period.

Employees have to change the fire door lockset if it is broken because if the

fire door cannot be opened, it could lead to very dangerous situation if

people are trying to the fire door in a panic, especially if there is also smoke.

This could cost lives in an emergency. In addition, the employees have to do

monthly check up of the condition of the fire door. If there is a hole or crack

on the fire resistant door, the door is considered as useless because smoke will

be able to come through the cracks and the fire will continue to spread to

other places within the complex. Lastly, employees have to ensure that the

fire door is accessible so that when people are trying to escape from the

complex, they do not need to interfere with any equipment, tools or objects

that could cause them further harm.

In conclusion, the majority of losses are preventable. Hence, the fire

protection system has to be improved because it is always easier to prevent

loss than to recover from the aftermath.

58

*For illustration purpose only

RECOMMENDATION AND

JUSTIFICATION ON IMPROVING

FIRE PROTECTION SYSTEM Water leak from the cooling tower

The water leakage from the cooling tower maybe be caused by the tower itself or

the pipes. However, it is more likely caused by the pipes regardless of the material of

the pipes due to clog or blockage along the drain line.

Hence, periodic maintenance is required to remove the clog. For instance, remove

the cap of the access point of the pipe, pour in mixture of bleach and warm water

and the clog shall be removed as the mixture flows in the pipe.

It is important to keep the ventilation drain pipe unblock because leakage not only

may lead to electric shock when in touch with electrical cables nearby but it also

may affect the cooling system in the building due to insufficient cooling agent to

take away heat from the refrigerant.

59

*For illustration purpose only

Mechanical fan

Due to malfunction of ventilation at the ground floor, mechanical fan is installed to

replace air conditioning. However, it is less efficient because there is no adequate

distribution of ventilation and fresh air.

Hence, the centralize air conditioning should be repair and properly maintained. In

order to achieve optimum and adequate ventilation, round cone diffuser should be

installed because round cone diffuser distributes cool air evenly in an enclosed

space.

Moreover, round cone diffuser can be installed in such a way to replace the

mechanical fan attached to the side between ground floor and first floor to improve

the ventilation and remove odour in the building.

Round cone diffuser

60

AHU Door

The gap between the doors of the AHU room might be caused by termite attack

over the time as it is made of solid timber. Since AHU room must protected especially

from fire, the door may be replaced with fire rated steel door.

Fire resistant door made of steel are durable in such a way that is has fire resistant up

to 3 hours, termite resistant and low maintenance.

Exposed ducting

The ceiling should be covered with ceiling tiles in order to hide the ventilation

ducting from exposing. Ceiling tiles comes with plain and many other pattern for

aesthetic purposes.

Plain ceiling panel

Aesthetic ceiling panel

61

Conclusion In conclusion, building services play a central role in contributing to the

design of a building, not only in terms of overall strategies and standards to

be achieved, but also in facade engineering, the weights, sizes and location

of major plant and equipment, the position of vertical service risers, routes for

the distribution of horizontal services, drainage, energy sources, sustainability

and so on. This means that building services design must be well integrated

into the overall building design from a very early stage, particularly on

complex building projects.

Through observing the PKNS building, we found that the building services of

this complex do not meet the requirements of Uniform Building By-Laws 1984.

For instance, we found that this building do not operate the voice

communication, which violates the requirement of UBBL 239 part 3 where it

states that voice communication system is required in every office area

exceeding 92.9 square meters in area. Besides that, it also violates the

requirement of UBBL 238 for not having a command and control system in

such a big building. Not only that, we also found that most of the fire

protection system are poorly maintained and some of them are not

functioning. Especially with the sprinkler system, almost every visible sprinkler is

covered with a thick layer of dust and some of these are damaged.

We truly hope that the management team of the PKNS building would take

action to support the operation and maintenance of the mechanical,

electrical and plumbing building services to ensure all systems are fully

operational and compliant as well as supporting the building and services

manager to ensure full compliance of all operating systems particularly with

the fire protection system, identifying risk and supporting solutions to create

procedures which are clearly documented. With a good building service

system, it can provide an optimum level of occupants’ comfort and protect

the customers as well as workers within the PKNS building.

Through this assignment, we have developed the ability to identify and

explain the relevant information related to fire protection system, vertical

transportation system, mechanical air-conditioning system and electricity

generation and supply system. It has also advanced our skill to distinguish and

differentiate the installation of various types of services in a building as well as

increasing our capability to analyze and scrutinize on the problem of the

building service systems.

62

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65

Appendix

66

Report 1 Date of site visite : 6th Nov 2015 ( Friday )

Location : PKNS Complex, Shah Alam

Attendees : Lee Pei Gie, Davin, Yong Seen Yee, Thun Shao Xun, Khoo Xin Yee

Absentees : Shane Sim Ee Han, Tay Sy Min

Job Scope :

Lee Pei Gie

Prepare letters

Take photo during visit

Observer

Davin

Driver

Observer

Yong Seen Yee

Observer

Note taker

Thun Shao Xun

Liase with PKNS Complex management, get approval

Observer

Note taker

Khoo Xin Yee

Observer

Note taker

67

Report 2 Date of discussion : 7th Nov 2015

Job Delegation :

Lee Pei Gie

Purpose of the building

Preparation of report

Compilation of report and presentation slides

Khoo Xin Yee

Discussion on vertical transportation

Discussion on electricity supply to building

Conclusion

Yong Seen Yee

Discussion on fire protection system

Discussion on mechanical and air-conditioning system

Acknowledgement and abstract

Thun Shao Xun

Analysis on mechanical and air-conditioning system

Davin

Analysis on fire protection system

Shane

Recommendation on mechanical and air-conditioning system

Tay Sy Min

Recommendation on fire-protection system

68

Report 3 Date of discussion : 8th Nov 2015

Content :

Davin, Khoo Xin Yee, Yong Seen Yee, Lee Pei Gie and Thun Shao Xun

complete their parts before 12th Nov 2015 ( Thursday ) and post on

Facebook group.

Shane and Symin commence their parts at 12th Nov 2015 ( Thursday )

and complete by 16th Nov 2015 ( Monday ).

Every member post the presentation slide on FB group before 20th Nov

2015 ( Friday ).

Sun Mon Tues Wed Thurs Fri Sat

1 2 3 4 5 6

Site Visit

7

8 9 10 11 12

Part 1, 2 and

3 completed

13 14

15 16

Part 4

completed

17

Report

compilation

completed

18 19

Powerpoint

completed

20

Powerpoint

compilation

completed

21

22 23 24 25 26

Presentation

27 28

29 30