to precast - building and construction authority · extol the virtues of precast construction, it...

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ADVISORS: Ang Lian Aik & Aw Pau Hwee, Technology Development Division (BCA); Goh Peng Thong, Alfred Wong Partnership Pte Ltd (SIA); Richard Lai, ADDP Architects (SIA); EDITOR: Punitha Govindasamy GRAPHIC DESIGNER: Sulaiman Latiff (Concrete Technology Today) PREFAB Architecture is published twice a year by the Building and Construction Authority (BCA), Singapore Institute of Architects (SIA) and Trade Link Media Pte Ltd (TLM). The editorial team is unable to accept any liability for errors or omissions that may occur, although every effort has been taken to ensure that all information is correct at the time of going to press. No portion of this publication may be reproduced in whole or part without the written permission of BCA. To contact the editorial team, please write to: [email protected] or call Tel: 63255024 EDITORIAL TEAM PREFAB architecture A BCA-SIA Publication 2004 • Issue No 2 One of the common reasons construction practitioners give for not going precast is that it can be restrictive and does not allow them to be as creative as one could be, as opposed to using cast in-situ. This assumption is not totally wrong. But the good news is there is an explanation and of course, a way around it. Prefabricated construction does not advocate fully precasting every element. Although the authorities extol the virtues of precast construction, it is undeniable, even to them that casting in-situ is an integral part of any job, making it just as buildable. The projects featured in this issue of Prefab Architec- ture are classic examples of just that. They demonstrate how the project team managed to use the best combi- nation of precast and cast in-situ concrete to overcome the challenges to achieve the desired design. And if that is not convincing enough, one of the most forward look- ing design and build contractors in Singapore, shares with Prefab Architecture the who, what, why, when and how of using precast construction. Balancing the use of precast and cast in-situ con- struction results in the developers, architects and engi- neers being happy at the end of the day, not to men- tion meeting the required buildability scores. By Punitha Govindasamy To precast or not to precast The archway of Amaranda Gardens

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Page 1: To precast - Building and Construction Authority · extol the virtues of precast construction, it is undeniable, even to them that casting in-situ is an integral part of any job,

ADVISORS: Ang Lian Aik &Aw Pau Hwee, TechnologyDevelopment Division(BCA); Goh Peng Thong,Alfred Wong PartnershipPte Ltd (SIA); Richard Lai,ADDP Architects (SIA);EDITOR: PunithaGovindasamy GRAPHICDESIGNER: Sulaiman Latiff(Concrete TechnologyToday)

PREFAB Architecture ispublished twice a year bythe Building andConstruction Authority(BCA), Singapore Instituteof Architects (SIA) andTrade Link Media Pte Ltd(TLM). The editorial team isunable to accept anyliability for errors oromissions that may occur,although every effort hasbeen taken to ensure thatall information is correct atthe time of going to press.No portion of thispublication may bereproduced in whole orpart without the writtenpermission of BCA. Tocontact the editorial team,please write to:[email protected] call Tel: 63255024

EDIT

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PREFABarchitectureA BCA-SIA Publication 2004 • Issue No 2

One of the common reasons construction practitionersgive for not going precast is that it can be restrictive anddoes not allow them to be as creative as one could be,as opposed to using cast in-situ.

This assumption is not totally wrong. But the goodnews is there is an explanation and of course, a wayaround it. Prefabricated construction does not advocatefully precasting every element. Although the authoritiesextol the virtues of precast construction, it is undeniable,even to them that casting in-situ is an integral part of anyjob, making it just as buildable.

The projects featured in this issue of Prefab Architec-

ture are classic examples of just that. They demonstratehow the project team managed to use the best combi-nation of precast and cast in-situ concrete to overcomethe challenges to achieve the desired design. And if thatis not convincing enough, one of the most forward look-ing design and build contractors in Singapore, shareswith Prefab Architecture the who, what, why, when andhow of using precast construction.

Balancing the use of precast and cast in-situ con-struction results in the developers, architects and engi-neers being happy at the end of the day, not to men-tion meeting the required buildability scores.

By Punitha Govindasamy

To precastor not to precast

The archway ofAmaranda Gardens

Page 2: To precast - Building and Construction Authority · extol the virtues of precast construction, it is undeniable, even to them that casting in-situ is an integral part of any job,

2 2004 • Issue No 2

AMARANDA GARDENS

Amaranda Gardens nestled withinserene Serangoon, features a ‘gar-den living’ theme with a vast areaof lush landscape. The develop-

ment comprises three 17-storey tower blocks with 189apartment units, with a single storey basement carparkand a wide range of facilities for the family at the 1ststorey. These facilities range from tennis courts and jog-ging paths to an adventure park complete with a tree-house and rope pyramid platform.

The elongated site that stretches from the east to thewest forms a reference in the layout of the towers’ foot-print and floor plans. The three tower blocks are adjoinedto form a linear building with two high level voids fromthe 1st to 5th storey. The high level voids serve as a relieffor the basement carpark and also frame the picturesqueview of the free form swimming pool from the joggingtrack.

The layering of planes with bay windows and planterboxes form transitions of space between the residentialunits and the landscape. The layering of façade also re-duces the solidity of the building form. All the bay win-dows and planters are prefabricated and the modularcomponents improve the buildability of the development.The bay windows are located at all bedrooms and somebathrooms, while the planter boxes are located at allliving rooms and bedrooms.

Excellent quality control is ensured through prefabri-cated construction as precise alignment and smooth sur-face finishes are achieved with little or no touching upwork required. The bay windows feature precise and con-sistent openings while maintaining straightness for thecoping and canopies. In addition, though less time is spenton the construction of planter boxes, the high quality fin-ish on the straight and square nature of the boxes facili-tate installation of the glass parapet.

By Juliana Lai Siu LingDesign Link Architects

Living amidstLiving amidstLiving amidstLiving amidstLiving amidstlush landscapelush landscapelush landscapelush landscapelush landscape

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32004 • Issue No 2

AMARANDA GARDENS

The aluminium cladding and glass envelop of the clubhouse

Page 4: To precast - Building and Construction Authority · extol the virtues of precast construction, it is undeniable, even to them that casting in-situ is an integral part of any job,

4 2004 • Issue No 2

AMARANDA GARDENS

Project TeamProject TeamProject TeamProject TeamProject TeamClient : Sherwood Development Pte Ltd

Design Consultant : Smallwood, Reynolds, Stewart,Stewart & Associates Pte Ltd

Architect : Design Link Architects

Structural Engineer : KTP Consultants Pte Ltd

M&E Engineer : Alpha Engineering Consultant

Landscape Designer : PDAA Design Pte Ltd

Interior Designer : Index Design

Quantity Surveyor : KPK Quantity Surveyors

Main Contractor : Poh Lian Construction Pte Ltd

Precast Consultant : WP Brown Pte Ltd

Precaster : Hong Leong Asia Ltd

The archways at the North and South elevation are aunique expression of the building as they form a relief tothe adjoining buildings while creating scenic views of thelandscape. Even though the archways do not have thenumber of repetition and economy, they are still prefabri-cated as the installation process is simpler and easier.The 5th storey column is cast first in order to receive thearchway, which is then hoisted and secured into position.Next the planter is hoisted and tied to the archwayafterwhich prefabricated beams and planks are installed.Then topping is cast to form the floor slab.

Using prefabricated construction techniques, no sup-port system is required below the archway when toppingis done on the floor because the prefabricated archway,beams and planks are self-supporting. Therefore the spacebelow the archway is freed up and is very neat and cleanas construction materials and products are manufacturedoff-site and brought together on-site for assembly. The re-duction in wet trades and number of unskilled workersalso improves overall quality. The in-situ technique wasnot used as extensive scaffolding would have had to beerected from the ground to the 6th storey and this in-volved time consuming installation of formwork, rebar andconcreting work. Furthermore, the quality of finishing maybe affected.

With prefabrication, construction time is reduced withproper planning thereby increasing productivity with goodwastage control. Neighbours also benefit as prefabrica-tion causes fewer disturbances such air and noise pollu-tion while improving safety as well. Most importantly,homeowners benefit with the high quality of finishing whichminimises the need for defects rectification.

Installation sequence of the precast archway

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52004 • Issue No 2

D esigned to enthrall a sense ofprivate retreat, Nuovo Execu-tive Condominium, located offthe junction of Ang Mo Kio Ave

6 and 9, represents sophistication that caters to the de-mand for increasing standards of contemporary living.

The site area is approximately 14,489 square metresand is relatively linear in profile. The three blocks of18-storey residential units are strategically placed totake leverage of the site and the extended views be-yond. In addition, the building blocks define a linearrecreation space that takes full advantage of the lengthof the site, whereby, the hard and soft landscape car-ries a streamlined organisation to visually lengthen thespace.

The communal-recreation area is designed with cleanand simple forms, patterns and rhythms. With a huge areafor water and intimate-resting spaces, the lush landscape

for retreat and renewal grants visual calmness and sen-sory pleasure.

The design concepts extend from environmental sen-sibility to the fundamental building block of the familyunit. Floor areas of the units for the 2-, 3- and 4-bedroomtypes, range from 104 square metres to 244 square metres.The unit types are planned with pragmatic simplicity yetthey exude elegance. Moreover, the implementation ofmodular-designs in all unit types meets the high expecta-tion of efficiency, buildability and economic feasibility.

In the interior spaces, a streamlined uncluttered aes-thetic look is adopted to create rooms that are light andgenerously spacious. In the living room, floor-to-ceilingwindows highlight all 297 units. All bedrooms have pro-jected bay windows that allow daylight to stream into theinterior extending the spatial boundary visually. The lightthat brightens each room plays a huge role in communi-cating a sense of life and comfort.

SophisticatedBy Kim Loh Fong/Jimmy NeoArchitects Vista Pte Ltd

living

NUOVO EXECUTIVE CONDOMINIUMNUOVO EXECUTIVE CONDOMINIUMNUOVO EXECUTIVE CONDOMINIUMNUOVO EXECUTIVE CONDOMINIUMNUOVO EXECUTIVE CONDOMINIUM

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6 2004 • Issue No 2

NUOVO EXECUTIVE CONDOMINIUMNUOVO EXECUTIVE CONDOMINIUMNUOVO EXECUTIVE CONDOMINIUMNUOVO EXECUTIVE CONDOMINIUMNUOVO EXECUTIVE CONDOMINIUM

The unit layout is designed in a way that allows ei-ther interaction or privacy. The living room, the heart offamily interaction is designed to have maximum view ofthe external surroundings. Bedrooms are designed as mod-ules that can be combined into larger suites. The masterbedrooms offer the conveniences of lavish attached bath-rooms. Service yards and bathroom windows are pur-posely concealed, yet sufficiently ventilated within deepcleavages in the blocks.

Thorough and sensitive planning was also imple-mented before the construction commenced. Various con-struction methods and techniques were studied to addressissues on buildability and quality. A combination of pre-cast and cast-in-situ construction techniques was adoptedas a result of the careful studies. With a combination ofprecast components, such as precast beams, slabs, baywindows, facades, household-shelter door frames, refuse

Close-up of precast curved facadeCreating variations using curved facade

Propping of precast facade

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72004 • Issue No 2

NUOVO EXECUTIVE CONDOMINIUMNUOVO EXECUTIVE CONDOMINIUMNUOVO EXECUTIVE CONDOMINIUMNUOVO EXECUTIVE CONDOMINIUMNUOVO EXECUTIVE CONDOMINIUM

Project TeamProject TeamProject TeamProject TeamProject TeamClient : City Developments Ltd

Architect : Architects VistaPte Ltd

Structural Engineer : KTP ConsultantsPte Ltd

M&E Engineer : Squire Mech Pte Ltd

Landscape : Cicada Pte LtdDesigner

Interior Designer : Index Design

Quantity Surveyor : Davis Langdon &Seah SingaporePte Ltd

Main Contractor : Poh Lian ConstructionPte Ltd

Precast Consultant : WP Brown Pte Ltd

Precaster : Hong Leong Asia Ltd

chutes, air-con ledges, etc., 48.5 percent of to-tal concrete found in the apartment blocks wasconstructed using precast methods. Strict andconstant monitoring of workmanship was alsoimplemented to raise quality control.

One of the key concerns during construc-tion was the consideration of acceptable ac-cess/egress requirements for the constructionvehicles and the need to restrict impacts of theconstruction process on neighbouring uses andexisting functions. As such, the workflow on sitewas constantly monitored. In addition, adopt-ing precast construction also helped to addressthe issues of excessive site congestion.

With a multitude of considerations, NuovoExecutive Condominium has managed to pro-mote an active contemporary sensibility andlifestyle that embraces the much popular tropi-cal environment.

Page 8: To precast - Building and Construction Authority · extol the virtues of precast construction, it is undeniable, even to them that casting in-situ is an integral part of any job,

8 2004 • Issue No 2

GOLDENHILL PARK CONDOMINIUM

By Low Tian HinADDP Architects

Condo on a slope

minium comprises five 20-storey tower blocks with a totalof 390 dwelling units, offering a choice of 2-, 3- and4-bedrooms units as well as penthouse units.

Design Concept

The typical unit has a rectilinear layout with standardsized living/dining room, bedrooms, kitchen, study/familyarea and bathrooms. The large span vision panels at theliving/dining room and master bedroom maximised theviews beyond the mesmerising landscaped pool area,surrounding parks and buildings.

T he Goldenhill Park Condo-minium was conceptualised asa landmark in a predomi-nantly mature landed housing

estate. Nestled on a sloping hilly site, it offers a pan-oramic view beyond the surrounding landed houses, parksand high-rise buildings. Located along Mei Hwan Drive,bounded by Ang Mo Kio Ave 1 and Lorong Chuan, thedevelopment features a site area of approximately2.4 hectares while the terracing site contours slope about8.5 m from the highest to the lowest end. The condo-

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92004 • Issue No 2

GOLDENHILL PARK CONDOMINIUM

The rhythmic staggering windows on the buildingfaçade addressed the unique site condition and echoedthe terracing site contours. The design details and sizesof the various elements were standardised so that thefour tower blocks had similar design features. The remain-ing block was designed to look slightly different from theothers.

ConstructionThe contractor, Hyundai Engineering and Construction

Co Ltd, proposed precast and cast in-situ concrete con-struction on the external building envelope for better con-trol on the quality of finished work, consistency andbuildability.

Hyundai used a flat plate floor system with perimeterbeams supported by external shear walls and columnsfor the superstructure. Internal columns were not used soas to give homeowners greater flexibility for the interiorlayout.

The internal walls were constructed with lightweightconcrete blocks with skim coat finish to save manpowerand to reduce the loading on the floors. Curtain wallswith regular modules served as the vision panels for theliving, dining and master bedroom.

Types of precast components used

Integration of precast and cast in-situ construction

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10 2004 • Issue No 2

GOLDENHILL PARK CONDOMINIUM

In addition, concrete is a denser material than brickwalland this would reduce the likelihood of rainwater leakinginto the units.

Secondly, the lifting points for the precast componentswere carefully designed to avoid excessive stress duringthe lifting operations. Besides, the lifting system was alsostrategically located for effortless lifting process.

Thirdly, it is ideal for precast components producedon site to have bigger dimensions to reduce the numberof liftings. The precast components adopted in GoldenhillPark required only simple site production facilities. In do-ing so, the production of precast components and con-struction schedule were well-coordinated.

Fourthly, steel formwork was used to produce the pre-cast components and the in-situ walls to achieve smoothconcrete surfaces. Not only were there savings in plaster-ing, steel formwork happens to be an environment friendlyway of construction.

Practical, buildable and environment friendly – thesesum up the effective design and construction work in-volved for the development of the Goldenhill Park Con-dominium.

The structural components for this project were de-signed to facilitate ease of construction and to achievehigher quality finished products. The facades were formedusing a series of precast bay windows, planter boxes, air-con ledges, trellises and cast in-situ flat walls. The hori-zontal joints between the precast components were le-veraged on to produce aesthetically pleasing elevationsgiving the buildings a unique architecture.

The architectural design with a well-coordinated engi-neering and construction method resulted in better qual-ity, higher buildability and cost efficiency. A number ofvaluable experiences were also gained during the de-sign and construction of Goldenhill Park.

Firstly, precast components were used in combinationwith cast in-situ slab and wall to offer a complete inte-grated structure. As the facades at the lower floor wereformed before construction progressed to the next higherfloor, other interior trades could proceed quickly withoutbeing interrupted by bad weather. This would not havebeen possible if the facades had been constructed usingconventional cast in-situ concrete frames with in-fill plas-tered brickwalls.

Simple and elegant elevations created using precast bay window,precast trellis and glass facade

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112004 • Issue No 2

GOLDENHILL PARK CONDOMINIUM

Project TeamClient : City Developments Limited

Architect : ADDP Architects

Structural Engineer : LSW Consulting Engineers

M&E Engineer : Meinhardt (Singapore)Pte Ltd

Landscape Designer : Site Concepts International

Interior Designer : WhyteBy Design Pte Ltd

Quantity Surveyor : Davis Langdon & SeahSingapore Pte Ltd

Main Contractor : Hyundai Engineering andConstruction Co Ltd

Precaster : Asiastar TechnologiesPte Ltd / Poh CheongConcrete Products Pte Ltd

Precast trellis - from production to installation

Extensive glass facade offering panoramic views

Page 12: To precast - Building and Construction Authority · extol the virtues of precast construction, it is undeniable, even to them that casting in-situ is an integral part of any job,

12 2004 • Issue No 2

DRAGAGES SINGAPORE PTE LTD

D ragages Singapore Pte Ltd’ssuccess in using precast con-crete lies in its ability to engi-neer the development from the

earliest stage of the project, and exploit its full potentialto offer clients, architects and consulting engineers inno-vative solutions. As one of the pioneers in precast con-struction in Singapore’s private sector projects, Dragagesrecognises the benefits of precast construction. These canbe briefly summarised as Buildability, Cost Effectiveness,Construction Speed and Durability.

In terms of buildability, a good precast system simpli-fies the construction sequence without compromising thestructural integrity of the building. Precast construction issafer and guarantees better temporary stability as work

By Audrey Perez, Dragages Singapore Pte Ltd

The Singapore branch of global construction company

Bouygues Construction, Dragages Singapore Pte Ltd,

has earned a reputation as a reliable and innovative

contractor. Set up in 1984, it is responsible for a number

of high profile projects in Singapore, such as the historic

Fullerton Hotel, the Ritz-Carlton Millenia Hotel, the

Millenia and Centennial Tower office buildings, and a

number of condominium projects. Currently it is engaged

on The Belmond Green condominium and The Savannah

CondoPark. It has won numerous awards over the years

for achieving construction quality, productivity and

buildability and shares with Prefab Architecture the

benefits of precast construction.

Why precast...

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132004 • Issue No 2

DRAGAGES SINGAPORE PTE LTD

progresses. Building up a pool of in-house skilled precastworkers further facilitates smooth execution of construc-tion works.

It is a common misconception that precast construc-tion is more costly. Based on Dragages’ experience, theoverall construction cost has been moderate whenprecasting is carried out on site while keeping connec-tion details simple. Time is a crucial element in everyproject. By producing precast components on site in afactory-like setting, a project can be completed quicklywithout compromising quality. In addition, savings on trans-portation time and costs can also be achieved. And byaligning precast production with the progress of construc-tion works, storage space is minimised while overall con-struction sequence continues uninterrupted.

With well-designed simple connection details, precastbuildings will be more durable and not susceptible todefects such as warpage and water seepage.

What to take note ofIt is important to note that precast structures are suit-

able for both repetitive building features as well as com-plicated architectural features. However, precast shouldnot be imposed on all projects. It should be adapted tothe needs of each project, in order to serve its true pur-pose, which is to ease the construction process. The typesand shapes of precast should not affect the design themeor the architectural language. It should serve to betterachieve creative architectural concepts.

Precast design is an interactive procedure, linking manyaspects of the architectural design, detailing, fabricationand erection.

There are a number of considerations to note namelystructural zones, temporary support and stability, sequenceof erection, integration with services, and above all, thedurability of the final structure.

Durability of precast structures is often a neglected

A combination of structural steel,cast in-situ and precast concrete was

used in the refurbishment of theFullerton Hotel and the construction of

the new One Fullerton

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14 2004 • Issue No 2

DRAGAGES SINGAPORE PTE LTD

issue. Steps must be taken to evaluate the performanceof different shapes and integrity of precast structure.Dragages’ philosophy is that ‘precast’ is a temporarystatus of building components during the constructionstage.

Once the construction of a building floor or section iscompleted, precast components cease to exist as indi-vidual elements and merge with the cast in situ compo-nents to form an overall building structure. The applica-tion of silicon at precast joints should be prohibited. Withproper detailing of the joints, precast panels can be sealedwith the in-situ structure so that common maintenanceproblems such as water seepage are then prevented.

Precast fabrication, transportation and installationshould be properly planned and accounted for duringscheduling. This way, productivity, cost effectiveness, quality,structural integrity, safety and construction speed will notbe compromised.

Precast beam, sunshade, parapet and A/C ledge are some of the precast components used at The LadyHill

Hazel Park - one of Singapore’s earliest precast condominiums

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152004 • Issue No 2

When to precastThe ultimate objective of using precast structures is to

make the construction process practical. Precast concreteis an alternative way to ease the complicated aspects ofconstruction. However, it must be acknowledged that pre-cast concrete is not the only way to enhance productivity,buildability and quality as it all depends on the feasibility.

One of Dragages’ strengths is its ability to concoct theright mix of precast and cast in-situ components to enhanceproductivity, buildability and quality. The prominent orangecolored modular metal formwork system, unique toDragages, is used both for precast and cast in-situ ele-ments. Getting the right construction method helps to over-come the main limitation of precast concrete - its weight.

What to precastCommon precast components found in Dragages’

projects are slabs, beams, staircases and complicated3-D or special features such as planter boxes, façadearches, curved beams and others. The use of these itemshas always been complemented with cast in-situ construc-tion to optimise their benefits.

Site precasting in afactory-like settingat the SavannahCondoPark

In this line, shear walls, household shelters and refusechutes are cast in-situ, and are often referred to as ‘pre-cast in-situ’ due to the excellent off-form quality compa-rable to that of their precast counterparts.

Why site precastingContrary to popular belief, precast can be a viable

and economical option when it is carried out on-sitewith your own workers. With site precasting, components’sizes are no longer an issue when it comes to transpor-tation. Strict quality control, supervision and better coor-dination with the construction schedule are also madepossible.

Over the years, Dragages has built highly skilled pre-cast teams. As such, Dragages is 50 percent more com-petitive in producing the precast components it needsthan if it involved other precasters.

However, this is only possible if the most competitivecombination of precast and cast in-situ components couldbe studied and decided during the early design stage.Again, this is possible with the use of modular metalformwork system.

DRAGAGES SINGAPORE PTE LTD

The distinctly coloured systemformwork used by Dragages

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16 2004 • Issue No 2

The beginning of prefabricationThe earliest prefabricated structures in France’s con-

struction history can be found during the industrialisationperiod and as early as 1889 (pre-assembled steel struc-tures for the erection of a bridge). Precast concrete’s his-tory in France started in the late 40s to early 50s duringthe re-construction period after WWII.

In 1952, Dragages’ parent company embarked on itsfirst precast project and went full-force in 1959 when itformed its subsidiary EPI, specialising in prefabricationas well as special methods of concrete processing.

Precast structures and prefabrication are thus part ofDragages’ construction culture and the company will nothesitate to incorporate extensively precast when it is nec-essary and beneficial to do so. In Singapore, Dragages’list of precast projects include residential developmentssuch as Savannah CondoPark, Belmond Green, TheLadyhill, The Equatorial, The Sterling, Floravale and HazelPark; and commercial developments such as The Fuller-ton, Ritz-Carlton, Centennial Tower, Millenia Walk andMillenia Tower.

The Savannah CondoPark -construction in progress

A 3-D precast bay window

DRAGAGES SINGAPORE PTE LTD

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172004 • Issue No 2

Poh Lian Construction Pte Ltd

Poh Lian Construction Pte Ltd • Tel : 6487 3201•Fax : 6284 1353 •Email : [email protected] •Website : www.ufs.com.sg

Forging

172004 • Issue No 2

ahead...Poh Lian Construction Pte Ltd (PLC),

a wholly owned subsidiary oflisted company United Fiber SystemLimited has been established inSingapore since 1975.

Registered as an A1 contractor withBCA, PLC’s core business is in the con-struction of a wide range of residential,commercial, industrial and institutionalprojects. With more than 20 years ofmileage, it has built up its capability toundertake the more challenging design-and-build as well as major upgradingprojects for public and private sectorclients. PLC prides itself on its significantcontribution to the building and construc-tion industry and its competitive pricing.

AwardsOver the years, PLC has earned nu-

merous accolades from the nationaland international institutions. These in-clude the then CIDB Construction Ex-cellence Award, HDB ConstructionQuality Award, ISO 9001, 14001 andOHSAS Certifications. The most recentaward was the 2004 BCA ConstructionExcellence Merit Award for the East Meadows Condominiumproject. PLC’s notable innovative design contribution for thisproject was the introduction of the external cladding sys-tem using Masterclad to construct the external facade fea-tures, complex roof features and box-up for M&E servicesenclosure. PLC also made a conscious effort to convert thestaircases, refuse chutes, manholes and linkway footings toprecast.

Condominium projectsWith its impressive track records of successfully com-

pleted HDB projects, PLC has amassed vast knowledgeand experience in precast construction. This expertise wasput into good use for the construction of two recently com-pleted private condominium projects, the Amaranda Gar-dens and Nuovo Executive Condominium. Precast compo-nents were used extensively for the facades, bay windowsand planter boxes for both projects. In addition, the Nuovoproject also used a precast beam-and-slab system.

Being a forward-looking contractor, PLC is constantlykeeping abreast with the latest in prefabrication techniquesand construction technology to persevere in its objective todeliver high quality projects.

Amaranda Gardens Nuovo Executive Condominium

East Meadows Condominium

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18 2004 • Issue No 2

C ivil and structural consulting engineers, KTP Consultants PteLtd’s motto is “To instil inspiration and innovation to meet our

customers’ needs”. From the preliminary design stage to detaileddesign and detailing stage, KTP has been providing practicaland reliable solutions to both developers and contractors.

With an impressive list of successful projects from The Bayshore,winner of 1997 BCA Best Buildable Design Award to E-Center@redhill, winner of 2004 BCA Best Buildable Design Award,this local-grown consulting firm’s substantial experience and know-how has contributed to the success of the building industry’s pushtowards more prefabrication and pre-cast construction.

At the Savannah CondoPark that iscurrently under construction, DragagesSingapore (Pte) Ltd has been workingclosely with KTP to use customised pre-cast half-slabs that act as both tempo-rary working platforms and part of thefinal product. This design representeda great leap beyond the conventionalprecast planks and hollow core slabswhich often do not provide the dexter-ity and high finishing standards re-quired of residential buildings.

At the Grandeur 8 site KTP is work-ing with Chip Eng Seng Contractors PteLtd on a customised precast load-bear-

ing wall system. This eliminates the need for cumbersome tra-ditional in-situ formwork and avoid the tedious, messy andlabour-intensive plastering work.

At another partial design-and-build project, the new ChangiPrison Cluster ‘A’, the original cast-in-situ structure was rede-signed into a predominantly precast structure. This included aninnovative volumetric precast prison cell proposed by Eng LimConstruction and L&M Precast Pte Ltd. These, together withother innovative and often tailor-made design and construc-tion methods, have enabled KTP to work with a number of

contractors to market the speed andeconomics of precast constructionto forward looking developers.

With the increasing trend of de-sign-and-build projects, KTP’strained staff work closely with de-velopers and architects from thepreliminary design stage to tenderstage to improve the buildability ofthe project while maintainingeconomy.

KTP also has an establishedtrack record of excellent partner-ships with contractors to introduceinnovative and speedy constructionmethods without compromising thehigh product precision and quality.

KTP Consultants Pte Ltd • Tel: 6273 5622 • Fax: 6273 8454 •Email: [email protected]

Consultants Pte Ltd

&InspireInspireInspireInspireInspire InnovateInnovateInnovateInnovateInnovate(Clockwise from bottom left) The Savannah CondoPark, E-Centre@Redhill, The Bayshore and Grandeur 8

18 2004 • Issue No 2

Casablanca under construction by ChiuTeng Enterprises Pte Ltd

Page 19: To precast - Building and Construction Authority · extol the virtues of precast construction, it is undeniable, even to them that casting in-situ is an integral part of any job,

192004 • Issue No 2

Boral Impact Panel is the latestinnovation in plasterboard lining

designed to satisfy stringent regulatoryrequirements for severe duty applicationsin commercial, industrial, institutional andresidential projects.

In the latest Buildable Design Codeof Practice issued in January 2004 inSingapore, one of the key changes is theincrease in the weightage of wall sys-tems from 30 to 40 points. The Boral Im-pact Panel System, a highly buildable dry-wall system that enjoys a high LabourSaving Index of 1.0, is tailored to meetsuch requirements.

The Boral Impact Panel System, com-prising 19 mm thick Boral Plasterboardsheets mounted on steel framing, is suit-able for use as an internal drywall sys-tem. The lightweight and slender drywallpartition offers significant reduction indead loads and is economical in termsof floor area savings. Performance-wise,the system is suitable for severe duty us-

Boral Impact Panel

Boral Plasterboard (M) Sdn Bhd , Singapore Branch • Tel : 65 6272 9272 • Fax : 65 6278 5310Email : [email protected] • Website : www.plasterboard.boral.com.au

age, having passed the strength and ro-bustness tests, such as Stiffness, DoorSlam, Impact, Heavyweight Anchoragestests in accordance to SS492:2001 withflying colours. In addition, the Boral Im-pact Panel System also offers a widerange of fire resistance and acoustic rat-ings to meet design requirements.

One main advantage that Boral Im-pact Panel System has over most wall sys-tems is the flexibility it can offer in termsof size and layout. The lightweight panelscan be easily sawn on site and quicklyreplaced and relocated according to therespective projects’ needs. The use of thissystem also facilitates dry construction asits smooth and even surfaces are readyto receive paint finishes directly.

Boral Impact Panel System has beensuccessfully used and proven in projectssuch as the Mandai Camp, Red Swas-tika Primary School, Singapore SportsSchool, Keat Hong Camp, SavannahCondoPark and The Pier.

System

Singapore Sports School

192004 • Issue No 2

The Pier at Robertson

Installation of the Boral ImpactPanel system at the SavannahCondoPark

Savannah CondoPark

DRY TRADE

CONSTRUCTION!

LIGHTWEIGHT

INTERNAL

WALL!

Page 20: To precast - Building and Construction Authority · extol the virtues of precast construction, it is undeniable, even to them that casting in-situ is an integral part of any job,

20 2004 • Issue No 2