accomodation - new
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ACCOMODATION OF
SERVICES
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INTRODUCTIONINTRODUCTION
Accommodation of services is very important during designstage.
A proper planning is needed in order to ensure the safety and
location of the services are strategic and easy to be foreseen bythe people in the building.
Each building will not provided adequate functionality if theservices is not accommodated in the right way.
Accommodation of services is very important to ensure the safetyof the services.
Method of installation also plays an important role to ensure
adequate functionality
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ProvisionofServices
Above the structural slab
- electrical conduit laid on top of slab after it is cast
- top screeding must be thick enough to bring finish
floor level above that of the conduit
- fibre or metal under floor ducting for electrical
especially telephone wiring may be used
- to reduce weight use lightweight concrete or
foamed mortar
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ProvisionofServices
Below the slab or below it supporting beam
- ribs or secondary beams on the underside
of the floor pipes may be suspended fromthe slab or rib soffit
- concealed with suspended ceiling at the
level of the rib or beam soffit
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Service Ducts
Ducts for service pipes and cables must run
both vertically and horizontally through the
building.
The horizontal ducts usually follow route of
corridors to allow ease of access, and may
be between false ceiling and the structural
floor.
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ELECTRICALELECTRICAL
AIRAIR--CONDITIONINGCONDITIONING
FIRE PROTECTIONFIRE PROTECTIONSYSTEMSYSTEM
TELECOMMUNICATIONTELECOMMUNICATION
TYPES OF
SERVICES
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TYPES OF SERVICESTYPES OF SERVICES
ELECTRICALELECTRICAL
Electrical ProtectionElectrical Protection
BusbarBusbar TrunkingTrunking
AIRAIR--CONDITIONINGCONDITIONING
DuctingDucting
Concealed InstallationConcealed Installation
FIRE PROTECTION SYSTEMFIRE PROTECTION SYSTEM
Method of InstallationMethod of Installation
TELECOMMUNICATIONTELECOMMUNICATION
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ELECTRICALELECTRICAL
AA wiringwiring systemsystem isis aa methodmethod ofof installinginstalling thethe electricalelectrical
conductorsconductors inin thethe buildingbuilding..
ItIt mustmust provideprovide supplysupply ofof electricityelectricity wherewhere requiredrequired withwithcompletecomplete safety,safety, reliability,reliability, protectingprotecting thethe buildingbuilding andand itsits
contentscontents fromfrom thethe riskrisk ofof damagedamage byby firefire andand protectprotect thethe
occupantsoccupants fromfrom injuryinjury formform shockshock..
AllAll wiringwiring systemssystems mustmust bebe providedprovided withwith electricalelectrical
protectionprotection..
ElectricalElectrical protectionprotection cancan bebe providedprovided inin twotwo waysways..
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ELECTRICAL PROTECTIONELECTRICAL PROTECTION
By providing continuous channels in or on the walls andfloors of the building, formed during construction. They
may be formed by:
i. In parts of the building structure, in the form of ducts,channels and chases.
ii. By shallow metal or fibre ducts and later covered with
concrete screed of plaster.
iii. Running special trunking.
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ELECTRICAL PROTECTIONELECTRICAL PROTECTION
By providing the cables themselves with
sufficiently strong protection sheath of
suitable material. Types of sheating are:
Tough rubber sheath
Polychloroprene sheating
Plastic sheating Lead alloy sheating
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BUSBAR TRUNKING SYSTEM
Busbar trunking system is a totally enclosedelectrical distribution system comprising solidconductors separated by insulating materials.
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BUSBAR TRUNKING
Distribution Trunking
i. Usually applied to distribute power over apredetermined area.
ii.
The busbar trunking can be run vertically orhorizontally or a combination of both.
iii. Power is taken from the busbar trunking by the use oftap off units which connect at defined positions alongthe busbar trunking and allow power to be taken form
the system usually via a suitable protective device.
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Feeder Trunking
For interconnect between switchboards or between
switchboard & transformer
More economical to use
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BUSBAR TRUNKING SYSTEMBUSBAR TRUNKING SYSTEM
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Electrical conduits are installed under the mechanical room slab floor.
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Underground electrical duct is installed.
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Fiber optic cable installation
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AIR CONDITIONINGAIR CONDITIONING
Air conditioning is the control of temperature and humidity in a
building as well as the cleaning of particles from the air.
The type of air-conditioning system that is being studied is
Split Unit System.
As the name suggests, a split system is an air conditionerwhich has been 'split' into two sections - an indoor 'evaporator'
unit and an outdoor 'condenser' section.
There are several accommodation method adopted for air-
conditioning :
i. Ducting
ii. Concealed installation
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DUCTING
Air conditioning ducts are the most cost effective and
efficient method of conveying cold air from point to
point, and distributing it where its needed.
Air conditioning ducts are manufactured from
lightweight polythene, and are compatible with most
air conditioners, evaporative cooler and fans.
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DUCTINGDUCTING
Air conditioning ducting (silver) installed in the ceiling
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CONCEALED INSTALLATIONCONCEALED INSTALLATION
ConcealedConcealed underunder thethe surfacesurface ofof walls,walls, floors,floors,beamsbeams oror aboveabove thethe ceilingceiling etcetc..
InstalledInstalled toto wallswalls beforebefore plasteringplastering workworkcommencecommence..
AlsoAlso cancan bebe mountedmounted toto wall,wall, ceilingceiling andand floorfloor..
ForFor thethe externalexternal 'condenser''condenser' unitunit hashas oneone or or twotwofansfans itit maymay bebe locatedlocated onon thethe roof,roof, onon aa wallwallbracketbracket oror inin anyany of of aa numbernumber ofof otherother location,location,
completelycompletely concealedconcealed..
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CENTRAL AIR CONDITIONER -
SINGLE UNIT
This installation has a connecting duct throughthe outside wall of the house into one end ofof
thethe airair conditioner,conditioner, withwith thethe existingexisting ductworkductworkofof thethe househouse connectedconnected toto thethe otherother sideside..
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CENTRAL AIR CONDITIONERCENTRAL AIR CONDITIONER --
SINGLE UNITSINGLE UNIT
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FIRE PROTECTION SYSTEMFIRE PROTECTION SYSTEM
There are several types of fire protection systeminstalled in the building such as :
i. Fire alarm system
ii. Hose reel
iii. Portable fire extinguisher
The accommodation for fire protection system
includes :i. Surface installation
ii. Concealed installation
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METHOD OF INSTALLATIONMETHOD OF INSTALLATION
i)i) Surface InstallationSurface Installation
Installed on the surface of walls and soffit ofInstalled on the surface of walls and soffit of
ceilings.U
sually used for wiring using conduits.ceilings.U
sually used for wiring using conduits.
Example fixed to walls, ceilings, beams, etc.Example fixed to walls, ceilings, beams, etc.
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METHOD OF INSTALLATIONMETHOD OF INSTALLATION
ii) Concealed Installationii) Concealed Installation
Concealed under the surface of walls,Concealed under the surface of walls,
floors, beams or above the ceiling etc.floors, beams or above the ceiling etc.
Installed to walls before plastering workInstalled to walls before plastering workcommence.commence.
Also can be mounted to wall, ceiling andAlso can be mounted to wall, ceiling andfloor.floor.
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FIRE SAFETY SYSTEM
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PREVIOUS EXAM QUESTIONSPREVIOUS EXAM QUESTIONS
The large number of services and extensive equipment requiredThe large number of services and extensive equipment requiredin many types of building necessitates early consideration ofin many types of building necessitates early consideration ofmeans of housing them both vertically and horizontally. Explainmeans of housing them both vertically and horizontally. Explainand illustrate the FOUR (4) methods of accommodating servicesand illustrate the FOUR (4) methods of accommodating servicesas described.as described.
Services can be accommodated in THREE (3) ways i.e. aboveServices can be accommodated in THREE (3) ways i.e. abovethe structural slab; within its actual thickness and below the slabthe structural slab; within its actual thickness and below the slabor below its supporting beam. Explain briefly the circumstancesor below its supporting beam. Explain briefly the circumstancesand method for each of the above provisions of services in floors.and method for each of the above provisions of services in floors.
The methods of accommodating electrical services across theThe methods of accommodating electrical services across thefloor will depend to some extent on the type of floor. Suggest, byfloor will depend to some extent on the type of floor. Suggest, byjustifying its suitability, and explain with the aid of sketches TWOjustifying its suitability, and explain with the aid of sketches TWO(2) alternative methods of accommodating such services across(2) alternative methods of accommodating such services acrossthe floor.the floor.
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YOUR TASK
Please update the notes withthe required sketches/
drawings or photographs....
TQ!
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