ADAA_Concept Report (low res)

INDEX
A R C H I T E C T U R E

S T R U C T U R E
M E C H A N I C A L E L E C T R I C A L P L U M B I N G
S U S T A I N A B I L I T Y
I N T E R I O R D E S I G N
L A N D S C A P E

A R C H I T E C T U R E 1
INTRODUCTION
SITE ANALYSYS
LAND USE PLAN
BUILDING HEIGHT
CURRENT SITE IMAGES
ENVIRONMENTAL ANALYSIS
CONCEPT DESIGN
CULTURAL ASPECTS
DESIGN CHALLENGES
DESIGN OPTIONS
BUILDING MASSING / CIRCULATION STUDY
VEHICULAR CIRCULATION
NOISE & DESIGN RESPONSE
DESIGN SKETCHES
BUILDING CODES
AREA
SITE PLAN
FLOOR PLANS
ELEVATIONS
SECTIONS
RENDERINGS
A R C H I T E C T U R E

INTRODUCTION
The new Abu Dhabi Accountability headquarters will be located on a site that offers views of
downtown to the south and the surrounding governmental and business district in addition to the
limited opportunity of the site, the building restrictions, regional environmental conditions and
response to traditional presents are the primary factors informing the design.
The headquarters building is composed of two main building masses the first mass is oriented
perpendicular  to the main road and obtaining the ideal orientation (East‐West) while the other mass is
oriented parallel to the first one and forming a big scaled gate  to the project.
The court yard at the North is derived from the traditional Islamic and gulf type, provides a shaded and
protected center to the complex from here the view expands towards the external.
While maximizing views, the exterior facades are also designed to respond to climatic conditions. The
Western, Southern and Eastern exposures incorporate both horizontal screens and deep ribbon
windows to reduce glare and heat gain. Transoms above the screens have tinted glazing for additional
solar protection. The response to the solar condition, together with variation in curtain wall treatment
add a layer of detail and scale to the compact building mass.  Metal structures shade the roof and
provide a support to the photo voltage panels that will help using the facades.

STE ANALYSIS
As per Abu Dhabi plan 2030
The Abu Dhabi Accountability site location is planned to accommodate national and institutional use
and the maximum height allowed in this area is G+9 (40m) due to Al bateen airport being nearby.
Al Khaleej Alarabi and Sh. Saeed Al Maktom Roads are the main high ways leading to the area.
The site is located in the middle of the business district where some important and governmental
buildings are surrounding the site.
Al the required facilities and services for the project are available around the site.

LAND USE PLAN

BUILDING HEIGHT

CURRENT SITE IMAGES
Upper photos:  Showing important buildings
                                                                                                     around the site

                                                                                    Middle left: View to the site

                                                                                                    Bottom photo: Panoramatic View from the site

ENVIRONMENTAL ANALYSIS

OPTIMUM BUILDING ORIENTATION
Using Ecotect Environmental Design Software The Optimum Orientation For The Buildings In Abu Dhabi
Has Been Calculated To Be 97.5o
From North.
We have oriented the office mass to a close angle that is parallel to the plot boundary to achieve the
maximum utilization of the land.

SITE ORIENTATION / WIND STUDY
Overlaying the climatic data onto the site shows the seasonal sun path as well as prevailing wind
directions.
The high sun angles in summer can be efficiently blocked by horizontal shading devices, however lower
sun angles at the east/west facades have to be mitigated with deeper shades.
The alternating wind direction is beneficial in designing the openings the favorable cool wind in
summer, while blocking it in winter.
Simulating the movement of prevailing wind around the building’s mass, the court yard and the gate
void will be utilizing designing natural ventilation strategies, to cool the building during appropriate
summer months hence reducing the requirement for mechanical ventilation.

SOLAR SHADING
According to the studies done on the Building’s mass, Locations receiving the highest solar heat gain
where identified and accordingly shading devices where introduced to block solar rays during the peak
hours of summer,

SUN PATH STUDY

CONCEPT DESIGN
Because of the function of the project as an important authority one of few that handles the
monitoring of the accountability of other governmental authority and departments of Abu Dhabi, the
transparency, clarity and this transparency was reflected in the overall design of this project
Using strong straight lines, curtain walls and white cladded walls that reflect the transparency that the
function of the authority acts upon.
Culture
This building is considered as a new landmark which expresses the culture of UAE in general; The
concept of this project come to emphasize on the future and to record this moment of change through
the relationship between the old and the new, through the relationship between the traditional culture
and the new emerging culture through the relationship between the past and the emerging future of
Abu Dhabi.
The project is intended to be integrated within the local culture of UAE. Studying the different
elements of the Libyan culture, the project has been inspired by the following elements:

GATE
As a symbol of traditional architecture, UAE is considered as an organic city at the heart of the desert,
which has been developed through the years by its residents reflecting the unique gulf culture and
reacting to the external environment of the place.
The traditional Gate is one of the features that ‫تميز‬ the Arabic Culture in general and Gulf style in
particular. It has been used for the City Gates and palaces and even traditional houses and mosques.
Gypsum ART
This form of art, the “GRC” has been known in the Gulf culture since the times of the ‫ال‬‫فتوح‬ ‫االسالمية‬ With
its sophisticated details and natural colors, Gypsum pattern is considered as a symbol of the gulf art

CULTURAL ASPECTS
After a thorough study of the UAE culture; we chose these four illustrated patterns to be used in the
building somehow whereas it is either used inside the building, the building gate frame, the large glass
box located in the middle of the gate or on the boundary wall around the building.

Design Challenges:
One of the main challenges is the future surrounding buildings witch will negatively affect the present
of the building along the main street and in case they are built on the edge of the plot will hide most of
the ADAA Headquarters.
We have tried all possible shape configurations within the plot to exam the vision impact on the
building in the future we found out that To Form an Iconic monumental frame for the building which
has a strong present on the area will avoid 0000000 of the building within the site however parts of it
are hidden behind the new neighbors.
SETBACKS
We have recommended creating a courtyard facing the North versus having equal wider setbacks in
both sides allow having internal shaded area for social gathering for the building users as well as
welcoming the important visitor for the Authority.
And Further To The Setbacks Defined By The Site Boundaries. It Was Seen To Introduce a Setback
Spacing Between The building and the adjacent Buildings At three sides. This Insures That The l
Buildings Receive Sufficient Natural Sunlight, Natural Ventilation And Sky Access.
Accordingly a Distance of 4 m was allowed as a setback.
GRID OPTIONS
To Achieve the Highest Structural and Geometrical Efficiency, a Study has been Done to Optimize the
Column Locations, Parking Grids And Aisles. This Insures the Optimum Organization of The Floor Plans
Without Impacting On The Flexibility.

Views:
Studying The Site’s Context Reveals Recommended Views Towards the main Road to the west and
towards the sport city and Sh zayed grand mosque from the upper floors with Less Recommendable
Views towards neighbor sides.
The courtyard space became a considerable internal view which maximize the opportunity of good
views for most of the office spaces.
The two main masses are positioned in a way not to obstruct the view for each other and open the
view to outside towards the main road.
The last floor where the chairman office located enjoys the best views as two side views towards the
main road and to the internal courtyard is obtained.
Views Through Site
Views towards Site
Views from Site

DESIGN OPTIONS

BUILDING MASSING / CIRCULATION STUDY

VEHICULAR CIRCULATION

NOISE AND DESIGN RESPONSE

DESIGN SKETCHES
The initial thought was to create
a statement that presents the
governmental Importance.

Examining different type of
shapes that give this effect
meanwhile have the best site
utilization, constructability and
efficient and confortable office
spaces.

BUILDING CODE
Occupancy Load:
As per international Building Code which Abu Dhabi is implementing; 9.3 square meters are dedicated
for each person in business use buildings which means that the maximum capacity of the building could
reach up to 1236 occupants.
However as per the design brief; the building will accommodate 160 occupants while in future with
some modifications in internal partitions and furniture the capacity of the building will reach to its
maximum.

Sanitary:
As per International plumbing Code table: 403.1 two groups of male and female toilets should be
provided contains 3 toilets and 2 wash basins for each.
Handicap toilets for M/F have been provided as per the accessibility chapter in international building
Code.
Parking:
As per (Car Parking Design Standard) issued be Department of transportation of Abu Dhabi a rate of 2.4
cars per 100 square meters of Gross floor area should be provided.
Having 3 underground levels for Car parking we obtained 183 parking slots with a shortage of 105
parking slots.
The shortage could be covered be having a forth basement as a solution.
Other option is to use Automated parking Garage that will provide extra parking and could reduce the
basement depth.

AREA
Parking Calculation

SITE PLAN

FLOOR PLANS

FRONT ELEVATION

LEFT SIDE ELEVATION

REAR ELEVATION

RIGHT SIDE ELEVATION

SECTION

RENDERING

1S T R U C T U R E
S T R U C T U R E

1 GENERAL

2 MATERIALS
2.1 Reinforced Concrete
2.2 Precast – Prestressed Concrete

3 DURABILITY

4 DESIGN PHILOSOPHY
4.1 FOUNDATIONS
4.2 SUPER STRUCTURE SYSTEM
DESCRIPTION
4.3 ADVANTAGES OF THE PROPOSED
SYSTEM

2S T R U C T U R E
1 GENERAL

This volume summarizes the construction methodology for the Abu Dhabi Accountability Authority
Head Quarters.

The parameters have been established as being the most appropriate for the Project, where the
proposed structural system accommodates the building functions, its architectural design and the
building service requirements.

2 MATERIALS

The choice of construction material in Abu Dhabi is affected by many factors specific to the region.
The following list identifies the most significant of these:

• High temperatures, which can exceed 45 Celsius at peak times.
• Airborne salt contamination due to the coastal location and high humilities.
• Large temperature ranges from day and night and seasonally, these can have significant
effect on the thermal movements of material such as concrete and hence the requirement
for regular spaced movement joints.
• High evaporation rates due to the high temperatures; this can cause in‐situ concrete to dry
quickly causing damaging thermal shrinkage.
• Availability of local sources of raw materials

The above mentioned factors are considered in the selection of construction material along the
structural advantages and disadvantages of different options, where in all cases great care must be
taken to ensure the structural integrity.

2.1 Reinforced Concrete

Reinforced concrete is the most common indigenous and locally available structural
construction material.

Concrete’s versatility, durability and economy have made it the world’s most used
construction material. It is used in buildings, high‐rise, dams, homes, floors and numerous
other applications.

Concrete is strong in compression, but weak in tension, thus adding reinforcement increases
the strength in tension. In addition, the failure strain of concrete in tension is so low that the
reinforcement has to hold the cracked sections together.

For a strong, ductile and durable construction the reinforcement shall have the following
properties:

• High strength
• High tensile strain
• Good bond to the concrete
• Thermal compatibility
• Durability in the concrete environment



Reinforced concrete can encompass many types of structures and components, including
slabs, walls, beams, columns, foundations, frames and more.
Much of the focus on reinforcing concrete is placed on floor systems. Designing and
implementing the most efficient floor system is key to creating optimal building structures.
Small changes in the design of a floor system can have significant impact on material costs,
construction schedule, and ultimate strength, operating costs, occupancy levels and end use
of a building.

Figure 2.1 Reinforced Concrete Constructions.

3S T R U C T U R E
The advantages of using reinforced concrete are:

• Local contractors and their tradesmen are experienced in reinforced concrete
construction;
• The reinforced concrete trade is well established in the Emirates;
• The building materials used are available locally;
• Total flexibility in space planning;
• Better resistance to environment attack from salt‐laden water;
• Concrete has increased resistance to explosion and/or impact;
• Concrete resists very high temperatures from fire for a long time without loss of
structural integrity;
• Concrete inherent mass and strength provides resistance to lateral forces;
• Concrete seeks the form – any shape can be achieved;
• Concrete has flexibility to accommodate design changes later in the progress;
• The inherent mass of concrete provides benefits in terms of acoustics and
vibration criteria of the building.

High yield deformed steel bars with a characteristic strength not less than 460 MPa
proposed to be used.
Reinforcement used for the concrete piles can be epoxy coated and/or special admixtures to
the concrete can be used to control corrosion.

                                        Fig. 2.2 Epoxy Coated Rebar                        Fig. 2.3 High Yield Rebar

2.2 Precast – Prestressed Concrete
Precast Concrete is a construction product produced by casting concrete in a reusable mold
or "form" which is then cured in a controlled environment, transported to the construction
site and lifted into place. In contrast, standard concrete is poured into site‐specific forms
and cured on site. Precast stone is distinguished from precast concrete by using a fine
aggregate in the mixture so the final product approaches the appearance of naturally
occurring rock or stone.

By producing precast concrete in a controlled environment (typically referred to as a precast
plant), the precast concrete is afforded the opportunity to properly cure and be closely
monitored by plant employees. Utilizing a Precast Concrete system offers many potential
advantages over site casting of concrete. The production process for Precast Concrete is
performed on ground level which helps with safety throughout a project. There is a greater
control of the quality of materials and workmanship in a precast plant rather than on a
construction site. Financially, the forms used in a precast plant may be reused hundreds to
thousands of times before they have to be replaced which allow cost of formwork per unit
to be lower than for site‐cast production.

There are many different types of precast concrete forming systems for architectural
applications, differing in size, function and cost. Precast architectural panels are also used to
clad all or part of a building facade free‐standing walls used for landscaping, soundproofing
and security walls and some can be Prestressed concrete structural elements.

Prestressed concrete is a technique that greatly increases loadbearing strength of concrete
beams, slabs and walls. The reinforcing steel in the bottom part of the beam, which will be
subjected to tensile forces when in service, is placed in tension prior to the concrete being
poured around it. Once the concrete has hardened, the tension on the reinforcing steel is
released, placing a built in compressive force on the concrete. When loads are applied, the
reinforcing steel takes on more stress and the compressive force in the concrete is reduced,
but does not become a tensile force. Since the concrete is always under compression, it is
less subject to cracking and failure.

4S T R U C T U R E

Figure 2.4 Precast construction

3 DURABILITY
Concrete structures shall be designed to resist attack from the following environmental
conditions:

1. Sulphates and chlorides in the subsoil.
2. Sulphates and chlorides in ground water.
3. Wind‐blown salts including aerosols.
4. The aggressive climate, including marine conditions.
5. Availability of suitable water for mixing and curing concrete.
6. Possible contamination by Sulphates and chlorides in aggregates.

4 DESIGN PHILOSOPHY

Generally, the design philosophy for the structure is as follows:

• Gravity loads will be transferred from the floor plates to vertical elements like columns and
walls, lateral loads will be transferred through floor diaphragm to the lateral loads resisting
system of shear walls and / or rigid columns. Scheme framing diagrams is shown in figure
2.5.

• Efficient transfer of loads from floors to foundation will be adopted consistent with the
architectural requirements.

• Maximization of materials and content of local origin will be a priority and will be taken into
account in the design decision process relating to the structural media and form.

• Incorporation of local construction practices and methods and use of local materials, which
may give rise to savings, will be considered during the design process.

• High strength materials for concrete, reinforcing steel and structural steel will be used
where possible within the constraints set by serviceability requirements. This results in
greater efficiency of construction materials and a lower cost of construction.

Figure 2.5 Framing and Load Transfer Schematic Diagram.

5S T R U C T U R E
4.1 FOUNDATIONS

Abu Dhabi is situated towards the eastern extremity of the geologically stable Arabian Plate
and is separated from the unstable Iranian Fold Belt to the north by the Arabian Gulf.  It is
believed that a tilting of the entire Arabian Plate occurred during the early Permian period,
resulting in uplift in southern Yemen and depression to the north east. Tectonic movement’s
peripheral to folding of the Iranian Zagros Range during the Pilo‐Pleistocene epoch probably
contributed to the formation of both the Arabian Gulf depression and the mountainous
regions in the north east of the UAE and Oman.

Of particular interest geologically and geotechnically is the presence of weakly cemented
calcareous deposits, deposits of evaporates, mainly gypsum and potential cavities/vast
features.

The foundation design will be based on the subsurface soil investigation interpretive report
and recommendations of the geotechnical specialist. Foundation type will be further
discussed during the Schematic Design phase upon soil investigation completion.

A combination of high performance concrete and an external membrane system to achieve
the necessary water proofing and durability will be used for the foundation. The use of a
high performance concrete in the foundations and basement external envelope is essential
to the design.  The concrete mix needs to be dense and impermeable, to prevent the ingress
of water, chlorides and sulphates into the concrete matrix to achieve the required level of
durability. The concrete must also display low shrinkage and coefficient of expansion
characteristics to achieve the joint‐less construction required by the design.

4.2 SUPER STRUCTURE SYSTEM DESCRIPTION

Abu Dhabi Accountability Authority Head Quarter comprises of 7 story plus two basement
level structure with span requirements of approx. maximum of 9 meters and with
approximate height clearance of 4 meters.
Building’s lateral stability is provided by the conrete shear walls. Slabs are acting as
diaphragms in order to transfer horizontal forces to the vertical bracing elements (columns
and shear walls). The diaphragm action is obtained by a system capable of transferring the
horizontal forces by arching or bending. The system is capable to obtain all forces due to in‐
plan action like bending, shear and tension and shall be continuous both in longitudinal and
transverse direction.

The utilization of Precast Concrete Hollow Core Slab framing system is introduced for this
building which has an approximate uniform spanning of 8.5 meters. 265mm thick hollow
core slab with 65mm cast in situ concrete topping with minimum reinforcement area is
capable to support the transfer loading forces as composite section to the transversal
nipped beams resting on the vertical structural elements “columns and walls”. See figure
2.6 for Hollow Core Slab photo.

Hollow core slab is supported on beams, refer to figure 2.7 for the typical detail of hollow
core slab resting on beams. Beams are supported by 800x800mm columns that are placed
typically in a grid system. In addition to the reinforced concrete columns, 300mm thick
reinforced concrete walls are introduced as lateral forces resisting system. Refer to figure
2.8 for the Proposed Building Frame and figure 2.9 for the proposed Typical Framing Layout.

    Figure 2.6   Hollow Core Slab.

Figure 2.7 Proposed Typical Detail of Hollow Core Slab.

6S T R U C T U R E





                 Figure 2.8 Proposed Building Frame with Shear Wall Cast In‐Situ.






                 Figure 2.9 Proposed Typical Framing Layout.

7S T R U C T U R E
4.3 ADVANTAGES OF THE PROPOSED SYSTEM

The proposed system presented part traditional construction and part Off‐site construction.
Advantages of traditional construction are discussed on section 2.1. This section will focused on
the Off‐site Construction advantages, as follows:

• Speed of design (typically 30‐60% quicker design time)
• Flexibility of design (ability to “plug & play”)
• Concurrent production, whist enabling works are under way
• Minimized site disruption, due to far less time on site compared to traditional
construction methods
• Improved quality: controlled conditions not weather dependant
• Flexibility,  through future expansion & relocation
• Far greater control over MEP, installation and design most of which is pre‐commissioned
under factory controlled conditions
• Construction schedule, reduced construction time by up to 50%
• Risk, increased predictability of project outcomes in terms of quality, cost and time
• Quality, factory production methodology allows for the improvement of building
quantity
• Procurement, increased ability for collaboration and single‐point of responsibility
• Factory Time Efficiency, methods of production reduce construction tast time
• Disturbance minimizes, disruptions to adjacent buildings and occupants and increase
cleanliness of building process
• Technology, greater ability to manufacture components with high degree of technical
complexibility
• Site, eliminates various site constraints such as staging, weather, transportation, etc.
• Security, factory environment improves conditions for constructioin workers
• Sustainability & Waste, improved project sustainability and viability of LEED ESTIMADA
rating
• Relocability, possibility to move structure to new location
• Economies of Scale, typical benefits of economy of scale are amplified for large projects

For Abu Dhabi Accountability Head Quarters two types of superstructure system can be adapted,

1. Hollow core slabs with Reinforced Concrete Framing.

This system is a Hybrid Style Construction that comprises of traditional beams,columns and
shear walls cast in‐situ construction and precast slabs construction.

Hollow core slabs are introduced for the floor
system. Pre‐cast pre‐stressed concrete
elements with continuous voids to reduce self‐
weight and achieve structural efficiency are
very popular and economic across a wide
range of spans and loadings.

The slabs are part of a full frame system and
are capable to provide rigid floor diagphram in
precast construction. Figure 2.10 Hollow Core
Slab supported on Concrete Beams.

The continuous slab voids can be used as
heating or cooling ducts and as raceways for electrical wiring while reducing sound transmission
and vibrations between floors.

Hollow Core floor planks are usually designed as simple, one‐way‐spanning slabs. Floors are
often subject to non‐uniform loads such as line loads, concentrated loads or loads at openings.

Figure 2.10

8S T R U C T U R E
2. Precast slabs, beams, columns and cast in‐situ shear walls.

This system is a Precast Construction throughout with cast in‐situ shear walls only. It is best
recommended to use reinforced concrete for shear walls to resist lateral forces applied to the
building.

Precast Construction is one of the most versatile and sustainable building materials available
for today's fast‐paced, environmentally conscious construction. Combining the strength and
durability of concrete with the flexibility and aesthetics of precast elements, it is considered on
the most economical and attractive construction solution available. As discussed, several
advantages using precast or Off‐site construction.

Figure 2.11 Precast Construction.

MECHANICAL, ELECTRICAL & PLUMBING 1
MECHANICAL, ELECTRICAL & PLUMBING
1.0 INTRODUCTION
2.0 REGULATIONS, STANDARDS AND REFERENCES
3.0 SCOPE OF WORK
4.0 AIR CONDITIONING AND VENTILATION SYSTEMS
5.0 DOMESTIC WATER SERVICES
6.0 DRAINAGE SERVICES
7.0 FIRE DETECTION AND PROTECTION SERVICES
8.0 ELECTRICAL SYSTEMS
9.0 TELEPHONE AND DATA COMMUNICATION SYSTEM
10.0 CENTRAL ANTENNA TELEVISION AND SATELLITE SYSTEM
11.0 PUBLIC ADDRESS AND MUSIC SYSTEM
12.0 FIRE DETECTION AND ALARM SYSTEM
13.0 SECURITY SYSTEM
14.0 TIME AND ATTENDANCE SYSTEM
15.0 ENERGY SAVING SYSTEMS & SUSTAINABLE MEASUREMENT
16.0 STANDARD AND CODES

1.0 INTRODUCTION
1.1 Purpose

The purpose of this MEP proposal is to establish key design criteria, methods of servicing, primary
distribution routes and locate major items of the electrical and mechanical systems.

2.0 REGULATIONS, STANDARDS AND REFERENCES
2.1 Publications, Standards and References

All work shall be carried out in accordance with the requirements of the local authorities and the
standards and codes included hereinafter.

ARI   American Refrigeration Institute
ASHRAE   American Society of Heating, Refrigerating and Air Conditioning Engineers Inc.
ASTM   American Society of Testing Materials
SMACNA Sheet Metal and Air Conditioning Contractors National Association
NFPA National Fire Protection Association
UL Under writers Laboratory
IEE Institution of Electrical Engineers
IEC International Electro‐technical Commission
IOS International Organization of Standardization
ADDC Abu Dhabi Distribution Company
ADSSC Abu Dhabi Sewerage Service Company
ADCD Abu Dhabi Civil Defense Authority
ETISALAT Local Telecom Authority

CIBSE Chartered Institution of Building Services Engineers

BSI    British Standards Institution
2.2 Materials

All materials used on the project shall be brand new and of high quality.

“New” is defined as newly manufactured, “state of the arts,” tested and proven item of equipment.
Items which have been held in stock for any extended period of time by either the manufacturer or
the supplier shall be rejected.

All materials used on this project shall bear the third party quality assurance stamp like British
Standard kitemark, UL, FM, LPC and/or other quality assurance authority as stated herein.

3.0 SCOPE OF WORK
3.1 Mechanical Services

The following services shall be provided for the project:

3.1.1 Air Conditioning

‐ Central air‐conditioning and ventilation.

3.1.2 Plumbing & Drainage

‐ Cold and hot water services network.
‐ Filtration of cold water services.
‐ Gravity drains connected to the city drainage network.

3.1.3 Fire Protection

‐ Automatic hose reels for use by occupants.
‐ Dry riser and landing valves for use by the fire department.
- Sprinkler system.
- Fire extinguishers

3.1.4 Building Management system

4.0 AIR CONDITIONING AND VENTILATION SYSTEMS
4.1 Design Parameters

Design in general shall be based on ASHRAE 62‐2007 recommendations in addition to the
following practical requirements.

4.1.1 Design Conditions

External  : 46 ºC DB, 29.4 ºC WB
(Summer)

Internal  : 23ºC DB, RH 50% + 5% (No specific humidity controls and resultant relative
humidity will be function of set point temperature).

: No winter heating shall be provided.

4.1.2 Ventilation, Occupancy and Heat Dissipation Requirements

Area Ventilation Occupancy
Heat Dissipation
due to Lighting
and Power
Offices   8.5 L/s/person 20 m²/person 40 w/m²
Meeting
room
3.1 L/s/person 2 m²/person 40 w/m²
Coffee
shop
Retail 7.8 L/s/person 6.7 m²/person 70 w/m²
Circulati
on/Corri
dor
0.3 L/s/m2
‐‐ 20 w/m²
Area Ventilation Occupancy
Heat Dissipation
due to Lighting
and Power
Storage
rooms
0.12 L/s/m2
‐‐ 10 w/m²
Recepti
on areas
3.5  L/s/person 3.3 m²/person 40 w/m²
Main
entry
lobbies
Prayer
rooms
2.8 L/s/person
0.83
m²/person
20 w/m²
Galleries
/show
rooms
4.6 L/s/person 2.5 m²/person 70 w/m²

For other areas refer to ASHRAE Standard 62‐2007.

Extract Air System
Area Extract Air
Public Toilet

25 L/s

4.1.3 Noise Levels

‐ Offices/Meeting Rooms NC 35
‐ Corridors & Public Areas  NC 40
‐ Toilets NC 40
‐ Plant rooms    NC 50


4.1.4 Air Filtration

a) Air filtration shall be based on ASHRAE 52‐76.

b) Fresh Air handling units shall have two banks of filters. Panel filter at 25% ‐ 30%
efficiency and bag filter at 85% ‐ 90% efficiency.

c) Fan coil units shall have 25mm thick cleanable panel filter at 25% efficiency.
4.2 System Description

4.2.1      Air Conditioning

Option – 1

Air cooled chillers on the roof of the building to serve FCUs/AHUs through chilled water network.

Although this option is simple and common, the following disadvantages are obvious:

a) Bulky installation on building roof.
b) Standby chiller shall be considered, i.e. dead capacity.
c) Major source of noise

Option – 2

Variable Refrigerant Volume System (VRV). The system comprises of modular outdoor unit
connected with multi indoor units via refrigerant piping network.
The system offers a considerable reduction of refrigerant flow as per the cooling load  demand
which will lead to a considerable energy reduction.

All indoor spaces shall be served with ducted indoor units.

a) Advantages

1) Limited/compacted space required on roof for outdoor units installation.
2) When integrated with control systems, the performance can be optimized to
achieve low energy consumption.

b) Disadvantages

1) System spare parts including pipe fittings and manifolds are limited to the
equipment supplier.
2) System cost is higher than option‐1.
3) Cooling capacity of the system is limited.
4) Fresh air handling unit shall be provided with separate conventional Direct
Expansion (DX) – condensing unit due to the limitation of cooling capacity for
VRV‐system.

Recommendation:

It is recommended to use Option‐2.

4.2.2   Ventilation

a) Central fresh air handling unit shall be provided. Fresh air shall be delivered to all indoor
units via insulated duct riser.

b)   FAHU shall have heat recovery section for energy saving.

c) Extract air shall be taken from toilets and pantries and ducted to the heat recovery
section of FAHU via duct risers.

4.2.3 Heat Recovery System

Thermal wheel shall be provided in the FAHUs in order to recover energy from the extract air
and pre‐cool the intake air to FAHUs, thus reducing the cooling load of FAHU coil for energy
saving.
5.0 DOMESTIC WATER SERVICES
5.1 Design Parameters
The design shall be based on the recommendation of the Chartered Institution of Building Services
Engineers and the Regulations of the Local Water Utilities Company. The following general
guidelines shall be followed:
a) Water velocity shall be limited to about 2.5m/s. to avoid water flow noise.
b) The temperature of the stored hot water shall not exceed 65o
C.
c) Dead legs to hot water draw off points shall be kept as short as possible.
d) Thermal and protective insulation of pipework shall be provided as specified.
e) Water storage tank shall be provided for domestic water consumption along with the
minimum fire reserve as stipulated by the local Civil Defence Authority.
f) Over head water storage tank shall be provided for domestic water consumption.
g) The booster pump shall be sized to supply water to al outlets while maintaining a water
pressure in the range of 2.0 to 3.5 bar at the outlets.
h) Pressure regulation valves shall be provided as necessary to limit the pressure within the
maximum permissible limits.
i) Water meters location shall be accessible to ADDC personnel.

5.2.1   Cold Water System

a) From the water mains, an incoming water line shall be connected to the main
underground concrete (RCC) water storage tank (1.5 daily demand capacity.

b)   Water from underground water tank shall be transferred via lifting pumpset to the
overhead tanks, which has to be located above the floors served by these respective
tanks.

c)   The overhead tanks shall have 1 daily demand as a domestic reserve for the floors
served by the respective tank.

d) Water supply to shall be toilets/pantries through booster pump set to maintain
minimum 1.5 bar pressure at the draw‐off points.

e) Water meter shall be provided on the incoming water line to the U/G main water tank.

5.2.2   Hot Water System

Hot water to the public toilets/pantries shall be provided through individual electric water
heater installed within the ceiling void of the wet areas.

6.0 DRAINAGE SERVICES

6.1 System Design

This will be a gravity drainage system designed in accordance with the recommendation of the
Charted Institution of Building Services Engineers (CIBSE) to the requirements of the Abu Dhabi
Municipality – Town Drainage Department.


All work shall be installed and tested in accordance with BS5572 Code of Practice for sanitary work
and to the satisfaction of the local Drainage Department. The internal drainage system shall
comprise of two stacks (soil and waste) with a separate vent pipe.  All drainage shall be discharged
into the city sewer main through a series of gully traps and manholes, as required.

A separate rain water system shall be installed to collect rainwater from the roof and discharge at
agreed locations on to pavement or to discharge into the city storm water main through a series of
catch basins and storm water manholes, as required.

7.0 FIRE DETECTION AND PROTECTION SERVICES
7.1 System Design

All systems shall be designed in accordance with the requirements as set out in the relevant British
Standards, NFPA and to the requirements of the Local Civil Defence Authority.

The various systems to be provided for this project are:

a) Automatic fire hose reels.
b) Dry riser with landing valves for use by the fire service personnel.
c) Automatic sprinkler system.
d) Fire extinguishers.


7.2.1 Automatic fire hose reels

This system shall primarily be for use by the occupants and used as a first aid means of
fighting a fire whilst awaiting the arrival of the Local Fire Brigade.

The fire hose reel pipework shall be connected to the fire mains through a pressure reducing valve
so as to maintain the system under pressure and to automatically release a jet of water when any
hose is uncoiled.

Fire hose reels shall be located such that these are readily accessible and that these can cover all
areas of the building with no part being more than 6 meters from the hose reel nozzle when the
hose is uncoiled.

7.2.2 Dry Riser with Landing Valves

This system shall be provided solely for use by the fire service personnel and shall consist basically
of one or more pipes rising vertically up the building with hydrant valve outlets on each floor and at
roof level. Landing valves shall be located within the same cabinet to be used for fire hose reels.

7.2.3 Automatic Sprinkler System

The project shall be provided with an automatic sprinkler installation, classified and designed in
accordance to NFPA 13 rules for automatic sprinkler installation.

    The sprinkler system shall be continuously maintained under pressure by fire pumps installed within
the pump room and serving sprinkler and automatic fire hose reels. The sprinkler system shall
consists of a network of piping with water always maintain the system under pressure. Fusible
sprinkler heads shall be screwed into the piping at interval as recommended by NFPA regulations.

In the event of a fire, the heat generated shall cause the fusible element in the adjacent sprinkler
head to disintegrate and thus allow water to be discharged onto the fire in the form of a fire spray.

At the same time as water is discharged onto the fire, water shall also be allowed to flow to a water
turbine which in turn shall operate an alarm gong thus giving an audible alarm that the system has
operated.  The system shall also be interfaced with the fire alarm panel in order to actuate fire
alarm bells in a fire situation.

7.2.4 Fire Extinguishers

Shall be dry powder and/or carbon dioxide as required by the local authorities

8.0 ELECTRICAL SYSTEMS
8.1 General

The following systems shall be provided for the project:

a) High Voltage System
b) Low Voltage Electrical Distribution
c) Emergency Power Supply through Standby Generator
d) Lighting and Small Power Distribution  System
e) Lighting control System
f) Central Battery Emergency Lighting System
g) Earthing System
h) Lightning Protection System
i) Security and CCTV System
j) Fire Alarm System
k) Public Address and Background Music System
l) Voice and Data Systems
m) Central Antenna and Satellite System
n) Building management system

8.2 Codes & Standard:

The electrical installation shall in general be designed to meet the following codes, standard and
requirement of:

a) NEC           National Electrical Code
b) NFPA         National Fire Protection Association
c) UL               Underwriters Laboratories
d) IEEE          Institute of Electrical and Electronic Engineer
e) IES              illuminating Engineering society
f) IEC            International Electro‐technical Committee
g) TIA             Telecommunications Industry Association
h) ADDC          Abu Dhabi Distribution Company
i) RSB Regulation and Supervision Bureau
j) ETISALAT    Local Telecom Company
k) ADCD            Abu Dhabi Civil Defense
l) BSI                  British Standards Institution
m) CIBSE             Charter Institute of Building Services Engineers

The installation shall also be designed to protect persons, property and livestock against hazard of
electric shock, fire burns and injury from mechanical movement of electrically actuated equipment.

Integration of mechanical and electrical discipline with the architectural design and adequate space
for electro mechanical services shall be provided to improve systems maintainability and reliability
and to integrate the same with the surrounding architectural appearance.

All electrical equipment shall be compensated to give the rated output at 35 °C for internal
installation and at 45 °C for the external installation.

8.3 Electrical Load Assessments:

The preliminary building load estimation shall be based on power density assumptions that apply to
the general space programs. As the utilization of spaces and other building systems are more
defined, the load estimation shall be provided accordingly.
.

8.4 High Voltage System

HV primary ring feeders shall be derived from the nearest primary substation in coordination with
Infrastructure Consultant.

The HV feeders shall power the ring main unit (TRM) rated to carry the total building load and
facilitate full redundancy in the event of one source or feeder failure.

The supply cables shall be routed from primary substation to the building via the underground
concrete encased electrical duct banks. In the buildings, the cables shall be terminated in the TRM
which in turns will provide HV feeder for the transformer within the transformer room. From the LV
side of the transformer LV cables shall be routed to the LV room to feed the main low voltage
switchgears, from which further distribution will be provided to the entire building via cables as
detailed hereafter:

The substation shall consist of high voltage room, transformer room, Generator room, etc. The
LV room will be located within the building at the edge near to the substation to optimize cable
runs. The exact arrangement of the sub station including the transformers and HV panels shall
be as agreed with ADDC.


8.5 Low Voltage System

The low voltage side of the transformers shall be connected to the low voltage panel located in the
LV room. The LV panel shall be constructed to the requirement of BSEN 60439‐1

The low voltage (LV) installation shall consist of 1600A main distribution boards (MDB) in
LV rooms located below the substations and motor control centers (MCC) for the chiller
plants, sub-main distribution boards (SMDB) and final distribution boards (DB).

Single core armoured cables from LV side of the transformers shall feed the MDB incomer circuit
breaker. Outgoing air / moulded case circuit breakers (ACB / MCCB) shall feed SMDBs and MCCs
through cables.

Low voltage system shall consist of the following:

8.5.1   Main Distribution Boards (MDB)

The construction of the main distribution boards shall comply with (form 2B, type 2 or Form 4B,
type 6) requirements of IEC‐439‐1 based on Client’s recommendation. The boards shall be
constructed to withstand a short circuit current of 50kA for 1 second, which is considered as a
safe short circuit protection level.  Ingress protection shall be to IP 41.

8.5.2   Main Distribution Boards construction details (MDB)

Option: 1

Form 2b, type 2 assemblies

Form 2b, type 2 covers overall assemblies which are so enclosed as to provide protection against
contact with some internal live parts and components but where there is internal separation of
the busbars from functional units.

i. Busbars are separated from functional units.

ii. Functional units are not separated from functional units.

iii. The busbar separation is achieved by metallic or non‐metallic rigid barriers, or partitions.

iv. Terminals are therefore separated from the busbars from functional units or each
other’s.

Option: 2

Form 4B, type 6 assemblies

Form 4B, type 6 covers overall assemblies which are so enclosed as to provide protection against
contact with internal live parts and components and in which there is internal separation of the
busbar system from functional units and separation of all functional units from one another.
Incoming and outgoing terminals are also separated from the busbars and from each other.

i. Busbars are separated from functional units.

ii. Functional units are separated from each other.

iii. Terminations to functional units are separated from each other.

iv. Incoming and outgoing terminals are separated from each other and from other
terminals.

v. The busbar separation is by metallic or non‐metallic rigid barriers, or partitions.
Terminals are separated by insulated coverings and glanded in common cabling
chambers.

The following LV panel forms construction to be advised by the client in terms of cost:

Option Form Yes   No
1 Form 2B Type 2
2 Form 4B Type 6

From the LV panel cables shall be routed to feed the power to the submain panels located in various
electrical rooms of each floor.

8.5.3 Sub Main Distribution Board

The construction of the sub‐main distribution boards shall comply with form 2, type 2
requirements of IEC‐439‐1. The boards shall be constructed to withstand a short circuit current
of 30kA. Ingress protection shall be to IP 41. The sub‐main distribution boards shall be located in
every floor of the building.

In general, SMDBs shall be provided to feed final distribution boards isolators in every floor.

8.5.3.1 Form 2, type 2 assemblies

Form 2 covers overall assemblies which are enclosed as to provide protection against
contact with any internal live parts or components, and where there is internal separation of
the busbars from functional units and their terminations.

i. Busbars are separated from functional units and incoming and outgoing terminals.

ii. Functional units are not separated from other functional units.

iii. Functional units are not separated from any incoming or outgoing terminals.

iv. Busbar separation is achieved either by insulated covering (e.g. sleeving, wrapping or
coating) or by metallic or non–metallic rigid barriers or partitions.

The LV panel and the sub main distribution shall be arranged such that maximum flexibility is
available to respond to any extra power.

8.5.4 Final Distribution Boards

From the dedicated SMDB each electrical room armoured cables on heavy duty cable tray shall feed
the final distribution boards (DB) located within the electrical room and which shall feed final
lighting and power circuits.

The final distribution boards shall be split busbar type and shall be provided with isolator as incomer
and miniature circuit breakers (MCBs) as outgoings with common RCD protection for each section
of MCBs. The minimum short circuit rating for final DBs and circuit breakers shall be 10 KA.

The LV switchgear and the sub‐main distribution shall be arranged such that maximum flexibility is
available to respond to any extra power.

Cables within the building shall be routed through cable trays, but all external underground
installation shall be using concrete encased uPVC ducts and manholes.

All cable shall be sized such that the current carrying capacity at 50 deg. C is equal or higher to the
rating of the breaker protecting the cable, method of installation of the cable and the spacing
between adjacent cables shall be taken into consideration in determining the cable current
capacities.

The cables shall also be sized to limit the voltage drop between the main panel boards to the final
power consumption point to 4% of the nominal voltage.

8.5.5 Starter Panels

Local starter panels shall be provided for equipment not controlled from motor control centers.
These panels shall be constructed as per form 2, type 2 Standards.

8.5.6 Capacitor Banks

8.5.6.1 Reactive Power Compensation

Electrical networks which include major inductive loads (e.g. motors) shall operate under
poor overall lagging power factor conditions. Also, in case these inductive loads are
constantly being switched on and off (e.g. HVAC equipment motors), the power factor of the
overall system shall change with every switching operation. A poor power factor is a major
(and avoidable) cost factor. There are basically three methods which are commonly used to
compensate for the inductive power drawn by a load or an electrical installation, and
thereby improve its power factor.
Option‐1:

Individual Compensation

In the case of individual compensation, the capacitors are connected directly to the terminals of
the individual loads and are switched in and out of circuit by the same common switching device.
The chillers shall  be provided with its own PFC capacitors to improve the power factor to 0.95.

Option‐2:

Group Compensation

In this case, the power factor correction equipment provides a fixed value compensation for a
number of motors or e.g. fluorescent lamps which are switched as a group by means of a
common contactor or circuit – breaker.

Option‐3:

Centralized Compensation

In most cases power factor correction units, which automatically switch power capacitors into or
from the load circuit, are used for centralized power factor correction.  They are usually directly
associated with, and installed centrally at, a particular switchboard, distribution board or
incoming supply.


8.5.6.2            Selection of Type of Compensation

The most suitable type of compensation is arrived at based on a number of technical and
economical aspects. Generally, central power factor correction units have a higher price per
installed kVAR.  As a guideline, it has been found that the cost of the two methods is comparable
for a diversity factor (or load factor) as high as 0.7 to 0.8.  If the diversity factor is lower, the
centralized method of compensation becomes more attractive.

In general, the system proposed for the project is centralized compensation which also complies
with ADDC requirements. The chillers shall have its own PFC capacitors as part of the soft
starter.

Capacitor banks shall be provided to improve the system power factor to greater than 0.90
lagging and shall be installed across the MDB. An automatic power factor regulator shall
continuously sense the power factor condition across the MDB and shall switch on or off
capacitors to maintain the overall power factor greater than 0.90 lagging.

Special filters shall be provided for capacitors to withstand transient harmonic currents in the
system. The capacitor panel shall be located adjacent to the MDBs.
The capacitor banks shall be constructed to IEC‐831 standard and capacitor bank enclosures shall
comply with IEC‐439‐1.

8.5.8              Energy Metering

Energy meters shall be provided as follows:

Main meter as per ADDC requirement for LV Panels sub metering according to client
requirements. In addition to the above, energy monitoring units (EMU) shall be installed in
MDBs for remote monitoring of power consumption, voltage, current, frequency etc. of each
panel on the building management system.

8.5.8.1 Dedicated Motor Control Center (MCC) shall be provided at appropriate location near the chiller
plant to feed the HVAC system equipment.

8.6 Emergency Power Supply system

A low voltage (415 V, 3 Phase emergency generator and its dedicated distribution system shall be
provided to power primarily the life‐safety equipment and devices.
The fuel storage tank shall be sized to store enough fuel for 1 days of generator run time.

Limited amount of power shall be available to back up some of non safety equipment in the building
that required functioning during the power failure.

The generator shall be located in the service block to ensure proper ventilation and near the
substation to reduce cable runs.

A dedicated Emergency Sub Main distribution board shall be provided for the building with a feeder
from the sub station generator panel and shall be located in the LV room for feeding all the
essential services of the building  Further power  distribution from the emergency MSMDB shall be
similar to the normal power distribution using sub main distribution boards and final distribution
boards to be located at the various electrical rooms and fed by cables on cable tray: The essential
services shall also include the following:

a) 40% of the lighting in the corridors and 25 to 30% of the general public area lighting.
b) 100% of the fire escape lighting
c) Elevator(s)
d) Service elevator
e) Domestic water pumps
f) Sump pumps
g) Control, security and main telecom room.
h) Smoke extract fans, staircase fans, etc

i) Life and safety equipment such as fire alarm system, public address, CCTV system, security
system, BMS, etc...
j) UPS

Emergency power generators can be provided 100 % back up subject to client request.

8.7 Un-Interruptible Power Supply (UPS)

An Un‐interruptible Power Supply (UPS) unit with battery backup will be provided in order to
maintain continuous power supply be provide to the main server and various IDTs. Autonomy time
will be 30 minutes.
8.8 Lighting

The illumination levels for the various areas of the project shall be generally in accordance with the
recommendation of CIBSE code.

i. Illuminance.

The design service illuminance for specific areas shall  be as follows:

SN Space Illumination
(Lux)
Control Lamp Type
1. Offices 500 • Presence sensors
• Override at space entrance
T5
Fluorescent
2. Meeting and
conference
rooms
500 • DALI ballasts
• Presence sensors
• Dimmer override at space
entrance
T5
Fluorescent
3. Corridors and
circulation
250 • Timer for working hours
• Presence sensors for after
working hours and holidays
• Override at reception desk
Compact
Fluorescent
4. Plant rooms 300 • Conventional switches T5
Fluorescent
5. Stairs 150 • Timer for working hours
• Presence sensors for after
working hours and holidays
• Override at reception desk
Compact
Fluorescent
6. Toilets /
washrooms
150 • Presence sensors Compact
Fluorescent
7. Kitchen / pantry 300 • Presence sensors
• Override at space entrance.
T5
Fluorescent
8.

Multipurpose
hall
300 • Dimmable DALI ballasts
• Handheld touch screen
controller
• Intelligent override switch
Compact
fluorescent +
track light
provision
9. Press
conference
300 • Dimmable DALI ballasts
• Handheld touch screen
controller
• Intelligent override switch
Compact
fluorescent +
stage
lighting
provision
10 External lighting ‐ • Timers and photocells Metal halide
/ fluorescent
/ LED

ii. Illuminance Ratios

a. The ratio of the minimum illuminance to the average illuminance over the
task area shall  not be less than 0.8.
b. In an interior with general lighting, the ratio of the average illuminance on the ceiling to
the average illuminance on the horizontal working plane shall be within the range 0.3 to
0.9.
c. In an interior with general lighting, the ratio of the average illuminance of any wall to the
average illuminance on the horizontal working plane shall be within the range 0.5 to 0.8.
d. In an interior with localized or local lighting, the ratio of the illuminance on the task area
to the illuminance around the task area shall not be more than 3:1.

iii. The Lighting layout shall be coordinated with false ceiling layout and all other services,and the
design service illuminance for specific areas shall  be as follows:

iv. Surface Reflectance

Surface reflectance as detailed below shall  generally be considered:

a. The ceiling cavity reflectance shall  be as high as practicable and generally at least 0.6.
This shall  usually mean that the reflectance of the paint or other surface finish must be
at least 0.8.

b. The effective reflectance of the principal walls shall be between 0.3 and 0.7. This
usually means that the walls surface finish shall have to have an actual reflectance
greater than 0.5.  The reflectance of window wall surfaces shall  be at least 0.6 to reduce
contract with the bright scene outdoors during day time.

c. Where practical, floor cavity reflectance shall be within the range 0.2 to 0.3. This
usually means that the relevant surfaces shall  have to have a reflectance greater than
0.3.

d. It is desirable for equipment and furnishings in working interiors, and in particular desk
tops, to have finishes with a reflectance of not less than 0.2.

v. Colour

Where accurate colour judgments are to be made, care shall  be taken to select proper colour
rendering group.

vi. Glare

a. Luminous ceilings utilizing large diffusing panels are not recommended for lighting
interiors.  In any case, the average luminance of such luminous ceiling should not be
greater than 500cd/m2
.

b. For indirect lighting, the average luminance of the ceiling should not be more than
500cd/m2
.

8.7.1 Light Sources

High efficiency light source shall be utilized wherever possible such as:

a) Fluorescent lamps (T5).
b) Compact Fluorescent lamps.
c) LED lamps.
d) Metal halide

8.7.2 Light Fittings

The light fittings shall be constructed to BS 4533.  Light fittings shall be specified according to the
type of protection against electric shock, the degree of protection against ingress of dust or
moisture and according to the material of the supporting surface for which the light fitting is
designed.

8.7.2.1 Information which shall be marked on light fittings shall be as follows:
a) Mark of origin.
b) Rated voltages(s) in volts.
c) Rated maximum ambient temperature.
d) Symbol of class II or class III light fitting.
e) Ingress Protection (IP) number.
f) Maker’s model number or type reference.
g) Rated wattage of the lamp(s) in watts.
h) Symbol for light fittings with built‐in ballast or transformers suitable for direct mounting
on normally flammable surfaces.
i) Information concerning special lamps.
j) Terminations to be clearly marked to identify which termination should be connected to
the live side of the supply, where necessary for safety or to ensure satisfactory
operation.  Earthing terminators shall be clearly indicated.
k) Symbols for the minimum distance from lighted objects, for spotlights and the like,
where applicable.

8.7.3 Proposed light fitting for various areas of the project:


S. N Location Description   Picture
1. Cove Light LED strip cove light, with LED lamps
spaces 50mm apart.  Power consumption
is around 7W per linear meter, which is
less than 25% of the equivalent
fluorescent cove power consumption.
2. Spot Light LED spot light made of zinc alloy body,
with 3 Nos. LED lamps and 3.6 W power
consumption which is 10% of it equivalent
halogen spot light power consumption

3. Offices   Recessed luminaire equipped with T5
tubular fluorescent lamps with colour
rendering 85, 4000 K colour appearance,
aluminium louvers with glare control to
luminance <1000 cd/m² at >65º C.

4. Corridors &
Circulation
Recessed, down lighter having wide beam
distribution, aluminium reflector, cast
aluminium mounting ring with outer
frosted floating glass.
Lamp: 2x18W compact fluorescent

5. Plant Rooms 2x54/2x28 T5 lamp, surface mounted
luminaire, having GRP housing, impact
resistant prismatic diffuser with stainless
steel clips, all to IP65


6.
Façade
Lighting
Powerful LED façade lighting with 3W LED
lamps. With colour changing feature.
Body made of aluminium alloy,
toughened glass to IP 65.

7.

External
Lighting
(Building
Perimeter at
ground
floor)
Wall luminaire with optical system
allowing light from one lamp to merge in
two directions with narrow upward beam
and wide down ward beam. 70W metal
halide lamp, aluminium alloy body
anodized aluminium reflector, IP65.

8. Roof Robust luminaire made of die‐cast
aluminium and thick walled crystal glass
with optical texture, 1x26W compact
flourescent lamp, IP55.

9. Toilet Recessed luminaire equipped with
compact fluorescent lamp with colour
rendering 85, 3000 K colour appearance,
glass diffuser, IP44.

10. Server
Rooms,
Control
Rooms
Recessed luminaire equipped with T5
lamps and glare control to luminance
<1000 cd/m² at >65º.
Colour rendering 85 and colour
temperature 4000 K.

11. Lobbies
Entrances
Decorative recessed circular down lighter
with two lamps (T5 Lamps)


8.8 Wiring Accessories

8.8.1 General Purpose Socket Outlet

General purpose 13A switched socket outlets shall be provided throughout the proposed
development.

All areas including plant rooms, roofs, stores, mechanical equipment rooms, corridors, lobbies
etc. shall be considered.

The switched socket outlets shall be in accordance with BS 1363 and BS 546 as
appropriate. Minimum number of outlets provided in each area shall be as follows:

Entrances and Lobbies   : 1 Outlet / 15m2
Corridors and Circulation Areas   : 1 Outlet / 15m2
Pantry / Kitchen :
To suit equipment
layout
Receptions     : One twin 13 ASSO for
each work station.

Workstations                              : One Twin 13A SSO per
workstation

8.8.2 Local Switches

Switches shall be grid type of the quick start make, slow break type specially designed for AC
circuit to BS 3676.  Switches shall be 20A grid type.

8.8.3 Finish of Wiring Accessories

All accessories in wet and damp areas shall be of the splash proof type to IP 55 protection
standard.

All accessories in plant rooms shall  be with metal clad finish.

All accessories above False Ceiling shall be white plastic finish.

The wiring accessories finishes in the public areas such as main entrance, lift lobbies, etc… shall
be either one of the following based on Client’s instruction:

SN Location
Wiring accessories finish
Remarks
Slim
crewless
metallic
finish
Slim screwless
white
polycarbonate
Slim screwless
coloured
polycarbonate
1. Offices /
workstations

2. Circulation areas
3. Multipurpose
hall

4. Press
conference &
auditorium

5. Reception
6. Leasable spaces

8.9 Lighting Control System

Programmable lighting control based on distributed intelligence system shall be provided for
controlling the lighting at the various areas.


The system shall automatically switch the lights on and off in pattern as programmed and with
features of changing the timing and type of lights controlled within a group.

All internal area lighting shall be controlled through timers and presence sensors. All external
lighting including those of building facial, landscaping, road/pathway, parking etc shall be controlled
through timer and photocells. As detailed in the lighting section

The system shall receive a signal through the fire alarm panel to switch all the lights ON during
fire and the lights connected to emergency power supply during power failure

8.10 Emergency Lighting system

8.10.1 Emergency and Fire Exit Lights

The task of emergency lighting is to provide safety lighting meant to evacuate a building
without risk. Emergency lighting systems are generally of two options:
a) Self Contained type, wherein the battery pack is contained in the light fitting itself.
b) Central Battery system, wherein the battery pack is centralized for a group of light
fittings and is remotely located.
The system proposed for the project is central battery system as it has the following
advantages over self contained type light fittings:

a) High safety level due to decentralized configuration.
b) Fully automatic periodic testing facility, whereby any faulty light fitting can be
immediately detected.
c) Fully automatic monitoring facility.
d) Freely programmable control module.
e) Continuous battery charge monitoring.
f) Very low operating costs.
g) No power loss from ballasts since ballasts are electronic and hence energy
saving.
h) Easy maintenance.
i) Periodic function test on all lamps, ballasts etc.
j) Yearly tests.
k) Display of current consumption and status information.
l) Print – out facility.
m) Extended lamp life.
n) Environment friendly maintenance – free lead accumulator battery with a
recycling rate of > 96%, over standard pollution prone nickel cadmium battery.
o) Interface with BMS for central control.
The Central Battery Emergency system will be based on DC system as per IEC 598-2-22
standard.

Emergency lights in the public areas shall be part of the light fittings used in that area. Separate
slave emergency luminaries shall be used in other areas including offices, shops, plant rooms, sub
station, store, etc.

Slave emergency luminaires shall be recess mounted in the offices and shops and surface
mounted in service areas.

8.10.2 Aircraft Warning Light

Becon strobe light shall be provided for the project for aircraft warning to satisfy the requirements
of the Civil Aviation Authority.

8.11 Main Earthing System

The complete electrical installation shall be mechanically and electrically continuous throughout
and shall be bonded to the main earth.

An earth resistance value of 1ohm or less shall be achieved in the main earth pits.

Earth continuity conductor shall be provided from main panel up to each final circuit termination
point.

All conductive but non‐current carrying installations shall be equipotential bonded to the main
earthing system.  The conductive installations shall include the following (as per BS 7430, Clause
20.4):

a) Water pipes.
b) Sprinkler and fire fighting pipes.
c) HVAC ducting.
d) Pipe risers of HVAC systems.
e) Exposed metallic parts of the building.
f) Lightning conductors.

8.12 Lightning Protection System

8.12.1   Effects of Lightning Strike
8.12.1.1 Electrical Effects
As the current is discharged through the resistance of the earth electrode of the lightning
protection system, it produces a resistive voltage drop which may momentarily raise the
potential of the protection system to high value relative to true earth. It may also produce
around the earth electrode a high potential gradient dangerous to people and animals.
8.12.1.2 Side Flashing
The point of strike on the protection system may be raised to a high potential with respect to
adjacent metal. There is therefore a risk of flashover from the protection system to any
other metal on or in the structure. If such flashover occurs, part of the lightning current is
discharged through internal installations, such as pipes and wiring, and so this flashover
constitutes a risk to the occupants and fabric of the structure.
8.12.1.3 Thermal Effects
For the purposes of lightning protection, the thermal effect of a lightning discharge is
confined to the temperature rise of the conductor through which the current passes.
Although the current is high, its duration is short and the thermal effect on the protection
system is usually negligible.
In general, the cross-sectional area of a lightning conductor is chosen primarily to satisfy the
requirements of mechanical strength, which means that it is large enough to keep the rise in
temperature to 1°C.

8.12.1.4 Mechanical Effects

Where a high current is discharged along parallel conductors in close proximity or along a single
conductor with sharp bends, considerable mechanical forces are produced.
Similarly, with a side-flash inside the building, the shock wave can result in damage to the
building fabric.

8.12.1.5 Function of a Lightning Conductor

A lightning conductor is incapable of discharging a thunder cloud without a lighting flash.  Its
function is to divert to itself a lightning discharge which might otherwise strike a vulnerable part
of the structure to be protected and to convey the current safely to earth.  The range over which
a lightning conductor can attract a lightning flash is not constant but it is now believed to be a
function of the severity of the discharge.

The range of attraction is therefore a statistical quantity.

On the other hand, the range of attraction is little affected by the configuration of the
conductor, so that vertical and horizontal arrangements are equivalent.  The use of pointed air
terminations or vertical finals are therefore not regarded as essential, except where dictated by
practical considerations.

8.12.1.6 Need for Protection

The following situations are to be considered while ascertaining the need for protection:

a) Where large numbers of people congregate.
b) Where essential public services are concerned.
c) Where the area is one in which lightning is prevalent.
d) Where there are very tall or isolated structures.
e) Where there are structures of historic or cultural importance.
f) Where there are structures containing explosive or flammable contents.

8.12.1.7 Proposed System

Faraday cage lightning protection system shall be provided to minimize the damage to the
complete structure in the event of any lightning strike.

8.12.1.7.1 The lightning protection system shall consist of the following principal components:

a) Air terminations.
b) Down conductors.
c) Joints and bonds.
d) Test joints.
e) Earth terminations.
f) Earth Electrodes.

The proposed Faraday Cage System for this project shall consist of 25 x 3mm bare copper tape
cage on roof in each span of 10m x 10m span. The down conductors shall be 25x3 mm Tinned
copper tape within the structural columns. The tape shall be fixed to the columns by ‘U’ clamps.

9.0 TELEPHONE AND DATA COMMUNICATION SYSTEM

9.1 Structured Cabling System

Cat 6A based structured cabling system shall be provided for the Telephone / Data communication
network and shall include Main and Intermediate distribution Patch Panels (MDT and IDTs for voice
and data), backbone cabling and structured cabling network for voice and data outlets.

The system shall be designed as per the latest EIA/TIA standards and as per local telephone
authority requirements. The topology shall be in the form of a hierarchical star in all parts of the
cabling infrastructure (horizontal, intra‐building, and inter building).

Main Distribution Terminal (MDT) of the Network shall be provided in the computer server room.
Further distribution within the building shall be carried out by dividing each floor of the building into
a no. of zones with an area not less than 1000 sq. mtr and by providing a dedicated telecom room
for each zone.

Intermediate Distribution terminal (IDT) shall be provided in the floor telephone rooms and shall be
connected to the MDT through cable trays.

Incoming Telecom cables shall be terminated in Telecom provider room and shall be connected to
the router / call manager.

The voice and data horizontal cabling shall be 4 pair unshielded twisted pair Cat 6A and RJ45 outlets
shall be provided for both voice and data.

The network MDT shall be located in the computer server room.

The data backbone shall be 12 core multimode optical fiber indoor cable to be installed in a
redundant configuration using separate risers.  The cables shall be run from each floor IDT to the
MDT. The cable shall be of type ‘OM3’ to ISO11801.

19” standard network cabinet with fans and power sockets shall be provided for accommodating all
voice and data patch panels, active network equipments, etc in the IDT.

All software and hard ware for the data communication system shall be provided by the client upon
handing over the project.

Voice and data outlets shall be provided at the various areas as per the area of usage and function,
in coordination with furniture layout and in accordance with the end user requirements, including
but not limited to the following:

a) Offices/Workstations
b)   Conference rooms
c)         Meeting rooms
d)   Model Hall
e) Reception
f) Press Conference & Auditorium

Category 6, four pair UTP cables shall be used for horizontal cabling. All indoor cables shall be of
Low Smoke Zero Halogen (LSZH) type.

Twin RJ45 outlet shall be provided for each workstation in coordination with furniture layout.
9.2 Wireless Data Network (Wi-Fi)

Access points for wireless network (WLAN) shall be provided for wireless connectivity inside the
building to allow access to voice and data services for staff away from their desks, and also for the
public for mobile internet access using PDA, laptops, mobile phones, etc.

The system shall be in compliance with the IEEE 802.11g standard using 2.4 Ghz radio frequency.
This technology, called Wi‐Fi, can provide a data rate throughput upto 54 Mbps.

Wi‐Fi access points shall be installed at various areas in coordination with architectural and
structural layouts and to obtain maximum coverage of the areas.  These Wi‐Fi hotspot can be open
or secured. Secured hotspot use an encryption system called WEP(Wired Equivalent Privacy) for
transmitting data, and only the user having a WEP key can be connect to the wireless network.

                   All Wi‐Fi hotspots shall be connected to the structured cabling network all the required provisions
shall be provided for the same. Actual equipment shall be supplied by the client based on the latest
technology product available in the market at the time of installation, which shall be based on the
current IEE802.11 standard (Wi‐Fi) or the latest IEE802.16 standard (WiMax).

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