buildable designs offer straighter walls and more consistent

NEWS RELEASE BEST BUILDABLE DESIGN AWARDS 2005

BUILDABLE DESIGNS OFFER STRAIGHTER WALLS AND MORE CONSISTENT QUALITY, SAYS CDL

1. City Developments Limited (CDL), one of Singapore’s leading property

developers, emerged as the biggest winner at this year’s Best Buildable Design

Awards (BBDA) – one of the industry’s most coveted awards conferred by the

Building and Construction Authority (BCA). CDL dominates in the Awards by

clinching 3 awards and 2 merits out of 13 winning projects. The CDL’s award

winning projects include Changi Rise, Goldenhill Park and Goldenhill Villas. The

Nuovo and Emery Point will receive the Certificates of Merit.

2. According to BCA’s Director for Technology Development, Mr Tan Tian

Chong, CDL’s sweeping win is not surprising, as it is known to be an industry

forerunner in embracing buildable design and reaping its many benefits. “In fact,

we have noticed that private residential developers are beginning to recognise

the labour and time saving benefits of prefabricated components, whereby 72%

of such projects now use some form of buildable systems as compared to only

14% five years ago.“

3. Mr Kwek Leng Joo, CDL’s Managing Director, said that it made sense to

apply buildable design in projects, especially with the rising expectation of

homebuyers. “As Singaporeans become more sophisticated and knowledgeable,

they expect better building quality. Buildable designs offer more consistent

quality, straighter walls, less re-work and fewer defects. Moreover, the sites

would be less messy, cleaner and greater productivity can be achieved.”

4. ITE College East, located along Simei Avenue, also won a Best Buildable

Design Award under the Institutional Buildings Category. The mega campus, with

a floor area of about 182, 000m2, was designed to meet the challenge of

developing ITE as a World-class Technical Education Institution for a knowledge-

based economy. The campus was successfully completed according to schedule

- 20 months, which was an extremely fast-track accomplishment in view of the

size and complexity of the project. This was made possible with buildable design

and the extensive use of prefabricated elements. The modern institution, with its

curvilinear geometry, is a distinctive and dynamic architectural statement that

stands out visually in prominence from the surrounding environment.

5. This year’s competition saw 17 submissions, of which 15 were shortlisted

for the awards. Besides the projects mentioned above, the other four award

winners are Kallang Whampoa RC 20A, Park Green Executive Condominium,

Redevelopment of Changi Prison Complex – Cluster A, and Ang Mo Kio Avenue

1 MUP 14. Another five projects were given certificates of merit.

6. The Best Buildable Design Award was inaugurated 14 years ago to

promote greater awareness and use of Buildable Design to improve quality,

productivity and a cleaner site. Only projects that have achieved outstanding

construction efficiency through the use of easy-to-build designs are eligible for

nomination.

Issued by the Building and Construction Authority on 11 May 2005.

FACT SHEET

BEST BUILDABLE AWARDS 2005 The Award The objective of the competition is to promote wider use of buildable designs and

to give recognition to the design teams for their involvement in buildings that are

not only aesthetically pleasing but also easy to construct. Nominations for the

BCA Best Buildable Design Awards 2005 competition were received in

September 2004.

The Recipients The designers (architects and structural engineers) are the principal recipients of

the Award. The developers, conceptual designers and main contractors who are

involved in the project will also be acknowledged.

Award Categories a. Residential Landed Buildings

b. Residential Non-landed Buildings (for projects with GFA < 25,000m2)

c. Residential Non-landed Buildings (for projects with GFA ≥ 25,000m2)

d. Commercial and Office Buildings

e. Institutional Buildings

f. Industrial Buildings

g. Mixed Development Buildings

h. Additions & Alterations / Upgrading Buildings Category

Assessment Criteria The entries were judged according to the following criteria:-

a. The buildability score of the project (50 points) b. Technical innovation (20 points) *New or improved design concept / approach

*Designing for effective mechanisation

*Use of innovative system, product or material

c. Simplicity for construction (10 points) *Simple and efficient connection detailing

*Other areas of simplification in architectural, structural or M&E

design/detail

d. Aesthetics (10 points) *Overall appearance and quality

*Special features

*Contextual e. Consideration for site constraints (5 points) *Access and safety management

f. Design Co-ordination (5 points) *M&E, structural and architectural works

Assessment Committee

Chairman: Mr Tham Tuck Cheong

Partner

Consultants Incorporated Architects and Planners

Members: Mr Goh Peng Thong Alfred Wong Partnership Pte Ltd

Mr Koh Beng Thong Surbana Consultants Pte Ltd

Mr Lau Tse Kit LAUD Architects Private Limited

A/ Prof Joseph Lim Ee Man National University of Singapore

Mr Quek Sze Swee Parsons Brinckerhoff Pte Ltd

Mr Satoshi Inoue Shimizu Corporation

Mr Shum Chee Hoong Housing & Development Board

Dr Tan Guan T Y Lin International Pte Ltd

Mr Wong Peng Yan Far East Organization

Mr Tan Tai Soon Straits Developments Pte Ltd

Mr Tan Tian Chong Building and Construction Authority

Mr William Tan Yong Keh Building and Construction Authority

BEST BUILDABLE DESIGN AWARDS

AWARD WINNERS

BBDA (Award Winner) GOLDENHILL VILLAS

(Residential Landed Buildings Category) Goldenhill Villas is an 83-unit 3-storey terrace housing project occupying a land area of 22,569m2 and is located within a mature landed housing estate in Ang Mo Kio/Tai Hwan Crescent. This Design and Build project has a GFA of 19,920 m2.

Architectural Consultant: S. H. Lim Architects Pte Ltd Structural Consultant: Richard K C Lim & Partners Main Contractor: Tiong Seng Contractors (Pte) Ltd (Design & Build) Precast Specialist Consultant: W P Brown Pte Ltd Client: City Developments Ltd Construction Cost: S$31.9 million Construction Period: 22 months Gross Floor Area: 19,920 m2

Buildability Score: 78 points Buildable Features The project adopted a full precast concrete system over the conventional in-situ structural system. Elements that were precast included load bearing partition walls, beams, slabs, façade bay windows, staircases, household shelters, water tanks, meter chambers and exterior boundary walls.

To reduce the number of precast components to be handled, different building elements were combined and integrated into a single piece of precast component. This integration concept was not confined to structural elements only but also included structural and architectural elements as well as structural, architectural and M&E elements. As such, this had helped to reduce the number of construction joints, eliminate labour intensive wet trades at site such as tile laying and wall hacking work for the installation of M & E services. The following are examples of integration of disciplines adopted in this project:-

• Integration of facade wall, beam, canopy and bay window • Incorporation of external brick tiles into precast structural facade wall • Integration of structural, architectural and M & E elements for concealing M & E

services into the precast wall The unit cost of $1,130/m2 (of constructed area) for this project was lower than the industry average of $1,500 to $1,700/m2 for terrace houses. The construction period of 22 months was within the industry average of 21 to 25 months for a project of similar size. There was also a 41% saving in manpower compared to the industry average for Residential Landed Buildings category.

BBDA (Award Winner) KALLANG WHAMPOA RC 20A

(Residential Non-Landed Buildings Category) (for projects with GFA > 25,000m2)

The project, which has a GFA of 48,312 m2, is sited at the junction of McNair and Towner Road. The development consists of two 30-storey blocks nestled in the midst of nearby HDB developments as well as two-storey pre-war terrace houses.

Architectural Consultant: Housing & Development Board Structural Consultant: Housing & Development Board Collaborating Architectural Consultant: Surbana Consultants Pte Ltd Collaborating Structural Consultant: Surbana Consultants Pte Ltd Main Contractor: Teambuild Construction Pte Ltd Client: Housing & Development Board Construction Cost: S$21.4 million Construction Period: 34 months Gross Floor Area: 48,312 m2

Buildability Score: 89 points

Buildable Features The project adopted a high level of standardisation and repetition and as a result, most of the reinforced concrete elements could be prefabricated. The precast elements consisted of refuse chutes, staircase flights, pre-stressed planks, infill walls, stack ducts, gable end walls, façade walls, parapets, air-con ledges, canopies, partition walls and roof fascia. Through the use of these precast components, which were highly repetitive and could be found on all floors, there was very little plastering required as the off-form finish offered by precasting was relatively even. The use of these precast components also helped to minimise the variety of trades during construction as compared to solely cast-in-situ construction.

The facades were designed for visual interest with the optimisation of precast technology. The precast panels used resulted in a finished product that was of high quality with improved productivity.

The household shelter was designed as one single component with hollow cores. This design not only solved the problem of tonnage limitation of tower cranes, it also improved buildability, save on concreting labour and ensured better quality on surface finishes. The hollow cores were placed with prefabricated steel cages and concreted, increasing productivity.

The unit cost of $344/m2 (of constructed area) for this project was lower than the HDB’s average of $560/m2. There was also a 48% saving in manpower compared to HDB’s industry average.

BBDA (Award Winner) CHANGI RISE CONDOMINIUM


The resort-style residential development consists of 598 apartment units housed in 11 blocks of 9 or 10 storeys, a basement carpark and facilities of swimming pool and tennis courts. The project, which has a GFA of 77,556m2 , is located at Simei Rise.

Architectural Consultant: Axis Architects Planners Structural Consultant: Parsons Brinckerhoff Consultants Pte Ltd Main Contractor: SsangYong Engineering & Construction Co., Ltd

(Design & Build) Client: City Developments Ltd Construction Cost: S$110.4 million Construction Period: 33 months Gross Floor Area: 77,556 m2

Buildability Score: 81 points Buildable Features The project adopted the flat plate construction system for the typical floor slab. This method of construction enabled easy and simple formwork to be used, hence simplifying the temporary staging and saving much time. With flat plate design, there were no beams crossing into any living space. Thus the project was able to maximise its clear room height. The basement was constructed using flat slab system. This system reduced excavation depth and volume and resulted in an increase in the productivity of the basement construction. The project also adopted the use of precast components extensively. Precast façade panels, staircases, refuse chutes, bay windows, sunshades and parapets were used to achieve construction speed and good quality finish and accuracy. In addition, the precast façade panels and bay windows also served as safety barricade during the construction. For the façade, large windows were provided where no side walls are required. In addition, windows were also provided below the bay windows thus creating a curtain wall effect.

Building block elevations

The unit cost of $811/m2 (of constructed area) for this project was lower than the industry average of $1,150 to $1,250/m2 for standard medium-rise condominiums. The construction period of 33 months was within the industry average of 28 to 35 months for a project of similar size. There was also a 31% saving in manpower compared to the industry average for similar projects.

Structural Buildable Features

Beamless Flat Plate Construction Pre-Cast External façade Pre-Fabricated Reinforcement Pre-Cast Shelter Component Pre-Cast Chute Units Pre-Cast Bay Window Pre-Cast Staircase Units

BBDA (Award Winner) Goldenhill Park Condominium


The project with a GFA of 51,113 m2 comprises 5 blocks of 20 storey apartments with basement car parks and communal facilities. This residential development is situated on top of a hilly site outside Mei Hwan Drive.

Architectural Consultant: ADDP Architects Structural Consultant: LSW Consulting Engineers Main Contractor: Hyundai Engineering & Construction Co Ltd

(Design & Build) Client: City Developments Ltd Construction Cost: S$79.8 million Construction Period: 30 months Gross Floor Area: 51,113 m2

Buildability Score: 76 points Buildable Features The project adopted a flat plate system supported by perimeter beams with external shear wall for simplicity in construction. This helped to eliminate the need for internal columns and improve co-ordination of architectural and M & E works. At the same time, the system offered flexibility for future reconfiguration of the unit layout.

flat plate with supporting perimeter beams and reinforced concrete walls The internal walls were constructed extensively with lightweight concrete blocks with skim coat finish to save manpower and to reduce the loading on the floors. The project had also adopted a seamless semi-unitised curtain walling system which was integrated with aluminium canopy and punctuated with precast planter boxes. The curtain walling system facilitated factory fabrication and speedy ‘just-in-time’ site installation after the assembly of precast concrete external components. The use of these prefabricated components ensured a high standard of quality and workmanship for the external façade which otherwise would be difficult to achieve conventionally. They also contributed to time saving, lesser wastages and better water tightness.

precast planter boxes

semi-unitised curtain wall system The unit cost of $935/m2 (of constructed area) for this project was lower than the industry average of $1,150 to $1,300/m2 for standard medium-rise condominiums. The construction period of 30 months was within the industry average of 28 to 33 months for a project of similar size. There was also a 32% saving in manpower compared to the industry average for similar projects.

BBDA (Award Winner) PARK GREEN EXECUTIVE CONDOMINIUM


Park Green Executive, located at Rivervale Link Sengkang, comprises 5 blocks housing a total of 391 units, a clubhouse with gymnasium, swimming pools and communal facilities. The development has a site area of approximately 17,000m2 and GFA of 52,223m2.

Architectural Consultant: Chao Tse Ann & Partners Pte Ltd Structural Consultant: P & T Consultants Pte Ltd Collaborating Architectural Consultant: LAUD Architects Private Limited Main Contractor: Tiong Seng Contractors (Pte) Ltd

(Design & Build) Client: NTUC Choice Homes Co-operative Ltd Construction Cost: S$62.6 million Construction Period: 26 months Gross Floor Area: 52,223 m2

Buildability Score: 75 points Buildable Features The project had adopted the combined use of flat plate system with full precast facade for the main buildings of the development. Precast facades were extensively adopted as the load bearing elements to support the load from the floors. This method of construction resulted in a faster construction and a neater site. The precast façade also resulted in high quality wall finishes on the exterior of the building. The project had also used prefabricated components such as precast refuse chutes, precast staircases, precast balconies, precast bay windows, precast planter boxes and precast aircon ledges extensively to improve productivity and reduce the number of wet trades on site.

precast bay window

precast balcony

precast A/C Ledge

The project had implemented several innovations in its construction, namely:- • Elimination of external formwork and see-through external jointTo eliminate the necessity of external formwork, the vertical precast façade had integrated this feature into the design and production. This had helped to achieve better water tightness structural systems. • Replacement of Conventional External Scaffold System Without having to install external formwork and with external finishing integrated into the precast system, the conventional external scaffold system had been omitted. Joint treatment and other finishing works were done using gondolas. The unit cost of $748/m2 (of constructed area) for this project was lower than the industry average of $750 to $850/m2 for executive condominiums. The construction period of 26 months was shorter than the industry average of 28 to 33 months for a project of similar size. There was also a 31% saving in manpower compared to the industry average for similar projects.

BBDA (Award Winner) REDEVELOPMENT OF CHANGI PRISON COMPLEX – CLUSTER A

(Institutional Buildings Category) The Redevelopment of Changi Prison Complex calls for the consolidation of all the existing medium and maximum security facilities of the Singapore Prisons Department which are currently dispersed all over the island onto a single site at the existing Changi Prison, situated at Upper Changi Road North. The redeveloped complex will houses 20 new institutions in 4 clusters and upon completion, the complex will have a total capacity to house 23,000 inmates. This project, Cluster A has a GFA of 149,626 m2.

Architectural Consultant: CPG Consultants Pte Ltd Structural Consultant: KTP Consultants Pte Ltd Main Contractor: Eng Lim Construction Co (Pte) Ltd (Alternative

Design) Client: Singapore Prison Service Construction Cost: S$194.3 million Construction Period: 34 months Gross Floor Area: 149,626 m2


Buildable Features Precast elements such as columns, beams, stair cores, lift cores, hollow-core slabs etc were used in this project. The cells were constructed as modular units which enabled the cells to be constructed off-site in the prefabrication yard while the foundation works and the central facilities which were housed on the ground floors were being constructed on site. The modular cells reduced construction activities on site and sped up the works.

The precast façade panels were integrated with canopies, window frames and grilles to reduce the works required at site. The window frames and grilles were cast into the pre-fabricated façade panels, thus eliminating time consuming installation works at the site. The M&E provisions in the project were very extensive due to the complexity of individually ventilated cell units and advanced security control systems. The modular cell construction ensured that all M&E penetrations and openings were identical, thus speeding up construction as well as simplifying future maintenance. The design also kept tolerances on all components to a minimum, ensuring faster erection and fewer adjustments. The unit cost for this project was $1,121m2 (of constructed area). The project was completed in 34 months.

BBDA (Award Winner) ITE COLLEGE EAST AT SIMEI AVENUE

(Institutional Buildings Category)

This project is a Technical Education Institution comprising 3 main building blocks

namely an Administration Block, a Technology Block and a Business and Sports Block. These blocks surround a

central interaction space and are interconnected with bridges at various

levels. The project with a GFA of 129,440m2 , is located at Simei Avenue.

Architectural Consultant: RSP Architects Planners & Engineers (Pte) Ltd Structural Consultant: RSP Architects Planners & Engineers (Pte) Ltd Main Contractor: Kajima Overseas Asia Pte Ltd Client: Institute of Technical Education Construction Cost: S$184.6 million Construction Period: 20 months Gross Floor Area: 129,440 m2


Buildable Features

The project adopted a high degree of precast elements with a total of more than 12,000 structural precast units which were prefabricated and erected in 6 months. As a result, the project was able to achieve a high construction productivity with the value-added outcomes of better quality control resulting in higher quality finishes; minimising use of labour resulting in reduction of labour cost; elimination of formworks/staging resulting in cleaner and safer working environment and an earlier commencement of other trades. building with precast columns,

beams, slabs & walls

The project also used prefabricated steel for the Central Forum Structure, Link-bridges, Spectator Gallery, Sport Hall Roof and covered link-way roof. This helped to shorten the construction time and create a neater site environment.

Drywall partitions and full height glass were also used extensively in the development to eliminate the labour intensive wet works.

Installation of drywall partition

The external envelope of all the three building blocks consisted of curtainwall and aluminium cladding. With a consistent floor-to-floor height, modularity of the unitised curtainwall panels and aluminium cladding was established easily. The choice of the façade system ensured the accuracy of fabrication in the factory and ease of installation on site. Wet works were also minimised in the process.

Completed curtainwall and aluminium cladding The unit cost for this project was $1,014/m2 (of constructed area) which was below the industry average of $1,400 to $1,850/m2 for projects of similar nature. The project was completed in 20 months.

BBDA (Award Winner) ANG MO KIO AVENUE 1 MUP 14

(Additions & Alterations / Upgrading Buildings Category)

The project involved the upgrading of 4 existing blocks of HDB flats at Ang Mo Kio Avenue 1 which were built in 1970. The scope of the upgrading works included new covered linkways, vehicle drop-off porches. precinct pavilion, children playground and sculpture court. Each block was upgraded with new lifts while the dwelling units had their toilets and electrical supply upgraded, windows changed, spalling concrete repaired. A new utility room was also added to all apartments.

Architectural Consultant: Architects Vista Pte Ltd Structural Consultant: Housing & Development Board Main Contractor: Evan Lim & Co Pte Ltd Client: Housing & Development Board Construction Cost: S$14.6 million Construction Period: 12 months Gross Floor Area: 61,308m2


Buildable Features

The utility rooms and new lift shafts were designed as volumetric component s and were fully precast. This increased the productivity as compared to the conventional in-situ casting which required on-site tying of reinforcement and fabricating of formworks.

The project also used prefabricated reinforcement such as beam cages, column cages and welded mesh extensively to further increase the site productivity. The unit cost of $558/m2 (of constructed area) for this project was lower than HDB’s average for MUP projects of $600/m2. The construction period of 12 months was also shorter than HDB’s average of 17 months for MUP projects of similar size.

BCA BEST BUILDABLE DESIGN AWARDS

CERTIFICATE OF MERIT

BBDA (Merit) EMERY POINT

(Residential Non-Landed Buildings Category) (for projects with GFA < 25,000m2)

This is a 19-storey condominium development with a total of 51 apartment units, two-level basement carpark, swimming pool and other communal facilities. The project has a GFA of 7,186 m2 and is located at Ipoh Lane.

Architectural Consultant: H • U • A • Y Architects Structural Consultant: Richard K C Lim & Partners Main Contractor: Hytech Builders Pte Ltd (Design & Build) Client: City Developments Ltd Construction Cost: S$13.2 million Construction Period: 31 months Gross Floor Area: 7,186 m2


Buildable Features The project adopted a typical and repetitive structural layout for the tower block, which enhanced the process of setting out, prefabrication of reinforcement mesh, preparation of formwork/moulds and reduction of material wastage. Repetition of layout also facilitated the use of precast wall panels and components on a large scale with economy. The basement was constructed using flat slab which incorporated the construction of the pile caps as well. Hence the productivity of the basement construction was increased. For internal partition walls, precast concrete hollow core panels were used and this had reduced the multiple processes of masonry and plastering works into one single process. The installation of these panels was a relatively dry process thus resulting in a neater and cleaner site. This also facilitated the early start of subsequent trades such as window and door frames and M& E concealed services.

As for the façade, the project adopted full height curtain walls and full height glass window panels. These components were fabricated off site with work on site only involving the assembly of the component parts and subsequent installation of glazing. The site process was therefore simplified involving only one trade as against a masonry wall system which involved multiple parties. This had translated into greater efficiency and productivity of work. The unit cost of $1,104/m2 (of constructed area) for this project was lower than the industry average of $1,300 to $1,500/m2 for mid-range high rise condominiums. The construction period was 31 months. There was also a 11% saving in manpower compared to the industry average for similar projects.

BBDA (Merit) BELMOND GREEN CONDOMINIUM (Residential Non-Landed Buildings Category)

(for projects with GFA > 25,000m2)

Belmond Green Condominium occupies a site area of 16,958 m2 and is located along Balmoral Road. The project, which has a GFA of 27,314 m2, comprises 5 blocks of 12-storey high residential building providing a total of 211 units of apartments, 2 clubhouses, swimming pools and a comprehensive range of communal facilities.

Architectural Consultant: RSP Architects Planners & Engineers (Pte) Ltd Structural Consultant: TY Lin International Pte Ltd Main Contractor: Dragages Singapore Pte Ltd (Design & Build) Client: CapitaLand Residential Limited Construction Cost: S$49.0 million Construction Period: 21 months Gross Floor Area: 27,314 m2


Buildable Features The sizes of the shear wall and columns were standardised to capitalise upon the proprietary system metal formworks. The project used system metal formwork for the shear walls, which had increased the construction speed and improved the quality of the finished product. The use of these structural shear walls also minimised the number of beams. Where the beams were necessary, they were integrated as lintels to form window/door openings or as upturn beams for bay windows. This resulted in fewer construction steps and reduced construction time and cost. The project also utilised precast components such as precast slabs, precast beams, precast stair flights, precast balconies, precast bay windows and precast rubbish chutes. These precast components were precast on site and hence saved labour and transportation costs. The unit cost of $1,041/m2 (of constructed area) for this project was lower than the industry average of $1,350 to $1,600/m2 for mid-range high rise condominiums. The construction period of 21 months was shorter than the industry average of 24 to 28 months for a project of similar size.

BBDA (Merit) NUOVO EXECUTIVE CONDOMINIUM


Nuovo is an Executive Condominium development located at the junction of Ang Mo Kio Ave 6 and 9. It comprises 3 blocks of 18-storey apartment buildings, a basement carpark, an environmental deck at first storey, clubhouse and communal facilities. The project has a GFA of 40,565 m2.

Architectural Consultant: Architects Vista Pte Ltd Structural Consultant: KTP Consultants Pte Ltd Main Contractor: Poh Lian Construction Pte Ltd (Design & Build) Client: City Developments Ltd Construction Cost: S$46.6 million Construction Period: 26 months Gross Floor Area: 40,565 m2


Buildable Features The project adopted a flat plate system in the design of the basement carpark which helped to reduce the formwork used and the depth of excavation. As a result, the productivity for the basement was improved. Precast elements such as precast gable walls, bay windows, precast planks, beams, canopy, aircon ledges/trellis, precast staircases, parapet walls and household shelter door frames were used in this project. The adoption of the precast fabrication technology had greatly increased the construction productivity and improved the buildability and quality of the building. Emphasis was also placed on the buildability of the wall system. Lightweight panels were used extensively in internal walls to achieve high labour productivity significantly. The installation of these lightweight panels was easy and the smooth finished surface of the panels also eliminated the need for wet works such as plastering. The unit cost of $683/m2 (of constructed area) for this project was lower than the industry average of $750 to $850/m2 for executive condominiums. The construction period of 26 months was shorter than the industry average of 28 to 33 months for a project of similar size. There was also a 41% saving in manpower compared to the industry average for similar projects.

BBDA (Merit)

ONE MARINA BOULEVARD (Commercial and Office Buildings Category)

One Marina Boulevard is a 32-storey office building located at the gateway to the new Downtown at the junction of Raffles Quay and the proposed Marina Boulevard. In addition to the offices, which occupy most of the building, the building also has a 600-seat auditorium, various meeting rooms and training rooms at the 7th to 9th storey, retail spaces at the basement underpass mall and elevated parking. The project has a GFA of 48,302 m2.

Architectural Consultant: DP Architects Pte Ltd Structural Consultant: P & T Consultants Pte Ltd Main Contractor: Samsung Corporation – Tiong Seng Contractors (Pte)

Ltd J.V. (Design & Build) Client: Singapore Labour Foundation Construction Cost: S$110.0 million Construction Period: 21 months Gross Floor Area: 48,302 m2


Buildable Features The project used prefabricated reinforcements for the band beams, reinforced slabs and the columns to improve productivity and efficiency in the use of the labour resources. Fully fabricated proprietary steel staircase formworks (Stairmaster) were used in the construction of the staircases. These were permanent self-supporting formwork complete with all threads and risers with only the topping up with concrete required at the finishing stage. This sped up the construction process and facilitated the provision of continuous vertical circulation within the building from the onset of the construction. The fully unitised glass curtain wall system was used as the envelope for the building. The incorporation of this wall system resulted in “fast-track” construction and omission of extensive wet trades usually associated with plastering and finishing works. The unit cost of $1,688/m2 (of constructed area) for this project was lower than the industry average of $1,800 to $2,100/m2 for mid-range, high rise office development within CBD. The construction period of 21 months was within the industry average of 21 to 24 months for a project of similar size.

BBDA (Merit)

WOODLANDS PRIMARY SCHOOL (Institutional Buildings Category)

This primary school development, situated at Woodlands Drive 50, comprises 4 blocks of 4-storey buildings, 1 block of 3-storey building and other ancillary buildings. This project has a GFA of 17,295 m2.

Architectural Consultant: CPG Consultants Pte Ltd Structural Consultant: CPG Consultants Pte Ltd Main Contractor: Jurong Builders Pte Ltd Client: Ministry of Education Construction Cost: S$13.1 million Construction Period: 11 months Gross Floor Area: 17,295 m2


Buildable Features The project adopted a precast structural frame. Precast muti-tier columns were used together with other precast beams, precast hollow core slabs and precast planks. A visible result of precast construction is that the site was tidier and cleaner due to fewer wet trades and material storage on site. The architectural buildable features were precast external facade, prefabricated screen panels and sunshades, aerated concrete blocks and dry partition panels. Using these elements eliminated wet trades, sped up the construction process and produced better quality finishes. The unit cost of $692/m2 (of constructed area) for this project was lower than the industry average of $780 to $920/m2 for primary school projects. The construction period of 11 months was shorter the industry average of 13 to 19 months for a project of similar size. There was also a 44% saving in manpower compared to the industry average for similar projects.

buildable designs offer straighter walls and more consistent

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