VOL. 20 NO. 3 SEPTEMBER 2007 MICA (P) No. 094/05/2007STEEL NEWS & NOTESSingapore Structural Steel Society on the Internet: www.ssss.org.sg

Conte

nts The President’s Corner ---------------------------------------- pg 2

New Members -------------------------------------------------- pg 3

Acknowledgements -------------------------------------------- pg 3

Advancement of High-Performance Steel in Building & Civil

Engineering ----------------------------------------------------- pg 4

Society Events ------------------------------------------------ pg 11

SSSS Structural Steel Design Awards 2007-------------- pg 12

New Products & Services ----------------------------------- pg 12

2

The President’s CornerDear fellow-members,

For the first 5 months of 2007,construction demand hit $7.6billion. With continuing increasein demand for residential andcommercial development andrising construction costs, the BCAis revising upwards its earlierforecast of $17 billion to $19

billion of construction demand for 2007. The latestforecast is between $19 billion and $22 billion. This isvery close to the previous peak demand of $24 billionexperienced in 1996.

With this surge in construction demand, the biggestchallenge in the coming years will be to our humanresources. Many of the big projects that need to becompleted in the next 3 years have yet to get into theirfull swing. But already, the manpower crunch is beingfelt by almost all parties - developers, consultants,builders and suppliers. Recruiting and retaining peoplewith the right skills is of topmost priority. And the talentswill come with a price which employers will no doubt bequite willing to pay for. I think we will not hearcomplaints of inadequate fees and low tender prices forquite a while.

For the steel sector, this is the golden opportunity todemonstrate the advantages of steel design andconstruction. Many developments will be hard pressedfor time and workers. Steel designers and relatedpractitioners who can come out with innovative designsto fast-track construction and at the same time reducethe number of construction workers required will be themost sought after. The SSSS will try its best to supportthe industry by stepping up our training and educationprogrammes for engineers and supervisors.

I would like to conclude by thanking all the sponsorsand supporters of our scholarship fund raising golftournament held on 14 June 2007. Because of yourgenerous contributions, the SSSS is able to award 4scholarships (2 for university undergraduates and 2 fordiploma undergraduates) this year. Once again, itreinforces and demonstrates our commitment to developpeople and talents for the good of our industry.

Warmest regards,

Tan Tian Chong

Published by :Singapore Structural Steel Society1-B Aliwal Street, Chenn Leonn BuildingTel: 6735 6255 Fax: 6392 5330avconsul@pacific.net.sg www.ssss.org.sg

Printer : Motion Printers & Publications Pte LtdBlk 3023 Ubi Road 3 #06-08 Singapore 408663Tel: 6783 3493 Fax: 6846 1636 Email:123@motionprinters.com

Council Members 2007/2008PresidentMr Tan Tian Chong, Building & Construction Authority(Tel: 6325 5921 email: tan_tian_chong@bca.gov.sg)

Immediate Past PresidentAssoc Prof Richard Liew, National University of Singapore(Tel: 6874 2154 email: cveljy@nus.edu.sg)

First Vice-PresidentMr Ho Wan Boon, Yongnam Engineering & Construction Pte Ltd(Tel: 9637 9971 email: wbho@yongnam.com.sg)

Second Vice-PresidentMr Bernard Chung, Corus South East Asia Pte Ltd(Tel: 6297 6678 email: Bernard.Chung@corusgroup.com)

Honorary SecretaryMr M.S. Islam, Singapore Polytechnic(Tel: 6879 0464 email: sirajul@sp.edu.sg)

Honorary TreasurerMr Anthony Tan, BlueScope Lysaght (Singapore) Pte Ltd(Tel: 6661 1215 email: Anthony.Tan@bluescopesteel.com)

Honorary AdvisorsMr Lim Keng Kuok, CPG Consultants Pte Ltd(Tel: 6357 4608 email: lim.keng.kuok@cpgcorp.com.sg)Assoc Prof Richard Liew, National University of Singapore(Tel: 6874 2154 email: cveljy@nus.edu.sg)

Council MembersAssoc Prof Ang Kok Keng,National University of Singapore(Tel: 6874 2570 email: cveangkk@nus.edu.sg)Mr Chia Wah Kam, Parsons Brinckerhoff Pte Ltd(Tel: 6290 0628 email: chia.wk@pbworld.com)Mr Chor How Choon, The 22nd Mettallurgical ConstructionCorporation (S) Pte Ltd(Tel: 9879 1398 email: chor_howchoon@yahoo.com.sg)Mr Look Boon Gee, LOOK Architects(Tel: 6323 8183 email: lookbg@lookarchitects.com.sg)Dr Ng Yiaw Heong, Petro Process System Pte Ltd(Tel: 6545 9968 Ext 500 email: ngyh@toepl.com.sgMr John Sanderson, William Hare (SEA) Pte Ltd(Tel: 9856 8036 email: sandersonj@sandersongroup.com)Ms Serena Yap, TY Lin International Pte Ltd(Tel: 6278 3383 email: serenayap@tylin.com.sg)

Editorial Board :Dr Ang Kok Keng Mr Bernard ChungMr M.S. Islam (Hon Editor) Mr Lauw Su WeeDr Ng Yiaw Heong Mr Look Boon Gee

STEEL NEWS & NOTES welcomes contributions on any suitabletopic relating to steel use and construction. Publication is at thediscretion of the Editor. Views expressed are not necessarily thoseof the SSSS, the Editor or the Publisher. Although care has beentaken to ensure that all information contained herein is accuratewith relation to either matters of fact or accepted practice at thetime of publication, the SSSS and the Editor assume noresponsibility for any errors in or misinterpretation of suchinformation or any loss or damage arising from or related to itsuse. No part of this publication may be reproduced without thepermission of the SSSS.

New Members

3

Acknowledgements

Singapore Structural Steel Society 23rd Annual Lecture and Dinner, 23rd August 2007The organising committee would like to record our grateful thanks to the following generous sponsors:

Hong Giap Engineering

Yu Gyo Engineering

22nd Metallurgical Construction Corporation(Singapore Branch)Association of Consulting EngineersSingaporeBuilding and Construction AuthorityBluescope Lysaght (Singapore) Pte LtdBoon Chang Structure Pte LtdChin Ee Engineering WorksChina Jingye Construction EngineeringContract Company (S’pore Branch)Construction Technology Pte LtdContinental Steel Pte LtdCorus South East Asia Pte LtdCPG Consultants Pte LtdDouble Y Builders Pte LtdECAS-EJ Consultants Pte Ltd

M/No Name Organisation Admitted

Honorary FellowHF 018 Professor Frans Bijlaard Delft University of Technology 23rd August 2007

Ordinary MembersOM 753 Soe Thein Chan Chee Wah Consultants 12th July 2007OM 754 William Ng Chin Hua NUS 12th July 2007OM 755 Chng Che Hwa Fong Consult 12th July 2007OM 756 Thuaraiappah Kiritharan Buro Engineering Pte Ltd 12th July 2007OM 757 Yow Cheong Hoe TY Lin International Pte Ltd 12th July 2007

Corporate MembersCM 98 Syscon Pte Ltd 12th July 2007CM 99 Sunlink Engineering Pte Ltd 12th July 2007CM 100 WR Grace Singapore Pte Ltd 16th August 2007CM 101 Sam Leck Metal Works Pte Ltd 16th August 2007CM 102 Construction Technology Pte Ltd 16th August 2007

Eng Lee Engineering Pte LtdG-Tech Metal Pte LtdHock Yong Heng General Contractor Pte LtdHong Giap Engineering Pte LtdHupsteel LtdThe Institution of Engineers, SingaporeJurong Consultants Pte LtdKaszon Pte LtdKim Seng Heng Engineering Construction PteLtdKong Hwee Iron Work & Construction Pte LtdLai Yue Seng Pte LtdLCP Building Products Pte LtdLee Yuen EngineeringLeong Siew Weng Engineering Pte LtdLSW Consulting Engineers

National University of SingaporeSam Leck Metal Works Pte LtdSee Hup Seng LtdSingapore PolytechnicSterling Engineering Pte LtdSurbana International Consultants Pte LtdTTJ Design & Engineering Pte LtdTunnelling and Underground ConstructionSociety (Singapore)WY Steel Construction Pte LtdYongnam Engineering and Construction (Pte)LtdYu Gyo Engineering & Trading Pte LtdZamil Steel Buildings Vietnam Co LtdZecon Engineering Works Pte Ltd

Participating Organisations

Advancement of High-Performance Steel inBuilding & Civil Engineering

4

Professor Frans Bijlaard,

Faculty of Civil Engineering and Geosciences,

Delft University of Technology

Introduction

For decades the use of high strength steels was not verypopular in the eyes of the designers and manufacturers ofsteel structures. The designers claimed that using highstrength steel was of very little use because of the fact thatthe Youngs modulus is the same as for mild steel. Themanufacturers of steel structures pointed at the higher costsof welding because of the special precautions which wereneeded to be taken in order to obtain sound welding.Furthermore there was much doubt about the toughness ofthe material and subsequently the ductility of the structuresmade of such types of steel.

In between, the concrete industry rapidly developed highperformance concrete and types of self compacting concretewith high strength under compression. Gradually these typesof concrete entered into the domain of structures which usedto be dominated by steel. Sheet piles, lock doors andstructures for industrial plants are examples of this tendency.

The way to face this competition is to develop strategies tobetter exploit the benefits of high and very high strengthsteels. In the design of structures it is better to strive at tensionand compression (truss systems) rather than bending in orderto avoid the design dominated by deflections. Furthermoreit is essential to develop safe and economic design (in factverification) rules for structures made of high strength steel.In this respect, the Eurocode 3 - Design of steel structures -Part 1-12: “Additional rules for the extension of EN 1993

up to steel grades S 700” can be seen as a “research agenda”for the next decade. Due to lack of sufficient theoretical andexperimental evidence in the f ield of ductility anddeformation capacity of structures and more in particular inthe area of rotation capacity of joints, the code tells thedesigner to remain in the elastic domain. Now the benefitsof high strength steel cannot fully be exploited. To cope withthis situation the interest in research into the performanceof high and very high strength steels is rapidly growing. In2005 IAPSE issued an important publication on the “Useand Application of High-Performance Steels for SteelStructures”. In this publication an overview is given of thestate of the art in USA, Canada, Japan and Europe withrespect to items like fatigue and fracture, weldability,weathering properties, buckling properties and the yield-to-tensile strength ratio requirements.

High Strength Steel

With modern steel manufacturing techniques it is possibleto produce steel with a high nominal strength, see Table 1.As a result of the improvement in the mechanical propertiesand the weldability of these Conventional High StrengthSteels (CHSS), with strengths up to 690 MPa, and theavailability of improved welding consumables and weldingprocesses, the number of applications where CHSS can beused to economic advantage over lower strength steels isgrowing. This is especially cost-effective in situations wherethe weight of the structure itself forms an important part ofthe total load on the structure, for example in long-spanbridges, high-rise buildings, cranes, and also in transportationand/or when an optimization on the dimensions of columnsin high rise buildings is a decisive parameter (see Figure 1a-1d).

Table 1

Strength [MPa] Description Other Descriptions Typical Examples Typical Applications

<300 Regular structural Mild steel S235 Buildingssteel

300-600 Conventional high High performance steel / S355 / S460 Bridges / High risestrength steel (CHSS) High tensile steel buildings

700-1000 Very high strength Ultra high strength steel / S690 / S960 / Cranes / Bridges /steel (VHSS) Super high strength steel S1100 High rise buildings

>1000 1570 / 1760 / 1860 Wires

5

Due to improper design and construction inevitable failureshave occurred. These failures illustrate the importance ofon going research on design and fabrication of steelstructures, guaranteeing the safety of builders and users offuture structures.

Safety, reliability and economy of structures are governedby adequate material selection, inspection and maintenance.The most efficient and economical structures are based onoptimized trade-offs between these parameters. For thesuccessful application of higher strength steels the materialand structural performance must be thoroughly understood.

In EN 1993-1-12 Eurocode 3 - “Design of Steel Structures -Part 1-12: Additional rules for the extension of EN 1993 upto steel grades S 700” directions are given in what cases thepresent rules in Eurocode 3 can be used for the design ofthese structures without modification or where these rules

need to be modified and these modifications are given.However, in many cases the Eurocode states that it is betterto remain in the elastic domain in designing these structuresbecause there is a lack of knowledge on the plastic behaviourand deformation capacity. For structures made of very highstrength steel, Eurocode 3 provides no information. To fillthis gap an extensive research programme is in progress inThe Netherlands on welded and bolted connections andstability of columns with the aim to evaluate the suitabilityof the latest generation of Conventional High Strength Steels(CHSS) and Very High Strength Steel (VHSS) for structuralapplications, based on assessment of test results and thestatistical evaluation of prediction models to arrive at reliabledesign rules. So, the main objective of the research is tosupply the steel construction industry with informationrelevant to the design and fabrication of these conventionaland Very High Strength Steel (VHSS) structures.

Figure 1.2b, Offshore platform Ekofisk, S420M Liftingship Saipem 7000, S690

Figure 1.2c, Basement columns Star City Complex,Australia, S690

Figure 1.2d, Mayflower Turbine Installation Vessel 1(TIV1) “Resolution”, NV-E/F36

Figure 1.2a, Akashi Kaikyo Bridge, Japan, S690

6

Fire Resistant Steel

One of the largest challenges that we face in the design ofsteel structures is the fire safety. Due to the rise of thetemperature in the steel during a fire, the material propertiesyield level and the Youngs modulus gradually decrease. InEurocode 3 Part 1-2 an extensive set of design rules are givento tackle this problem. In that code two methods may befollowed of which the applicability will be prescribed bythe National Authorities. The one method is the classicalfire design based on the Standard ISO Fire Curve. The othermethod is the Natural Fire Safety Concept, which is a moderndesign concept developed in reaction to the much lessrealistic Standard ISO Fire Curve method.

In Japan the first attempts were made decades ago to develop“fire resistant steel”. These types of steel have a betterperformance of the behaviour of the yield level and theYoungs modulus as function of the temperature during firethan conventional carbon steel.

Prof. Colin Bailey of the University of Manchester provideson his website a lot of direct applicable information on thestructural behaviour of fire resistant steel. He refers to manyresearchers who published their reseach on this topic, e.g.:

- Fujino et al. (1993) reported a FR steel of Grade SM490Bdeveloped by Kawasaki Steel (denoted as KSFR steel)

- Sakumoto et al. (1992) and Sakumoto & Saito (1995)reported a FR steel of Grade SM490A developed byNippon Steel (denoted as NSFR steel).

- Kelly & Sha (1999) reported a test programme on twoFR steel samples of Nippon Steel (denoted as FR1 &FR2). The details of FR1 and FR2 such as thickness werenot provided.

Figure 2 compares the reduction factors of yield strength ofvarious FR steels reported in the above references. The yieldstrength was measured at 0.2% strain offset from thetemperature-stress-strain curves. Although there is a largediscrepancy between the test results, all FR steels are in therange of 2/3 yield strength at ambient temperature at 600°C.

Figure 2: Reduction factor for yield strength dependent onthe temperature during fire

Sakumoto et al. (1993) reported the results of experimentalstudies on the tensile and shear strength of high-strengthFR bolts materials and joints at high temperatures. The FRbolts are a Grade F10T torque-control bolt made ofBOLTEN110N-FR steel and prepared in accordance withthe JSS II-09-1981. The bolts had a nominal 0.2% yieldstrength and tensile strength of 1090 and 1130 N/mm2

respectively. For comparison, the fire tests for the originalhigh-strength bolts made of BOLTEN110N steel were alsocarried out in this study.

Figure 3 shows the reduction factors for 0.2% yield strength,Young’s modulus and tensile strength of FR and originalbolts derived from the fire tests. The tensile strength wascorresponding to 2 to 3% strain. It can be seen that the tensilestrength of FR bolts at high temperatures is superior to thatof original high-strength bolts. Compared to the designvalues for tensile and shear strength of original bolts inaccordance with EN1993-1-2, the FR bolts have a muchhigher reduction factor of tensile strength throughout thetemperature range. However, it is found that the design curveof EN1993-1-2 follows closely the test values of the originalbolts.

So far, the information on fire resistant steel is being referredto Prof. Colin Bailey, University of Manchester.

Figure 3: Reduction factors for 0.2% yield strength,Young’s modulus and tensile strength of FR and original

bolts derived from the fire tests

7

Research in The Netherlands

In the Stevin II Laboratory of Delft University of Technologya lot of research is going on in the framework of theapplication of high strength and very high strength steel inbuildings and civil engineering structures. Some examplesof that research is explained briefly.

Reeling of Tight Fit Pipe

The main question of this research project is whether TightFit Pipe will have enough structural integrity after beinginstalled by the reeling method. In figure 4 the manufacturingprocess of tight fit pipes is explained.

Beam-to Column Joints in High Strength Steel

Research is carried out on end-plate connections and on thecolumn web panel zone.

The reseach is firstly focussed on the rotational capacity ofsuch connections made of high strength steel in case theend plate is the determining structural part. Figure 9 showsthe test set-up.

From this research it could be concluded that usingundermatched welding has a positive effect in avoidingcracking starting from the weld toe. It is also concluded thatalthough the structure is made of high strength steel, thebolt class should be 8.8 or 10.9 at the highest because thepresent high strength bolts of a class higher than 10.9 do nothave sufficient deformation properties to follow the bendingof the bolt shank (threaded portion) under the head and nutdue to the deflections of the end plate.

At this moment research is going on into the shear zonecolumn panel behaviour of high strength steel columns. Thisis shown in figure 10.

The effect of the reeling installation method on the technicalintegrity of the tight fitted pipe is studied both analyticallyas well as experimentally. The research is explainedschematically in figure 5.

Figure 4: Manufacturing process of Tight Fit Pipe

Figures 6, 7 and 8 show the principle of the reeling processand photographs of the equipment.

Figure 5: Failure mechanisms during reeling

Figure 6:Principle of thereeling process(reeling offstage)

Figure 7: Reeling vessel

Figure 8: Striaghtener

8

Figure 9: Test set-up of an end-plate connection

Figure 10: Forces in the column web panel zone and testrig in Stevin II Laboratory

(11.1) Test A1 (S355)

(11.2) Test 6 (S690)

(11.3) Test 14 (S960)

Figure 11: Illustration of the failure modes of severalspecimens

9

(12.1) X-joint with low SCF

(12.2) X-joint with high SCF

(12.3) Cross plate connection

Figure 12: Types of test specimen

Welded Connections

The interest for the application of steels with a very highyield and tensile stress, so called Very High Strength Steel(VHSS), has been increased in recent years. In the testprogram VHSS with a strength which lays a factor two tothree higher then the maximum strength of the commonlyused structural steels in the design codes is considered. Thisincreasing interest is based on economic benefits usingVHSS. These benefits are due to weight reductions, whichlead to reduce use of material and savings during fabrication(e.g. welding costs). Another aspect of this growing interestis the fact that using this type of VHSS in specific structureslike very heavy lifting cranes, a real new scale of structurebecomes possible. To achieve the same level of safety andcomfort with the lightweight VHSS structures, specialattention has to be given to the fabrication and design ofVHSS structures. In fabrication the welding and colddeformation of VHSS can lead to weld defects and materialdeterioration resulting in reduced safety of the structure. Indesign special attention has to be paid to the design ofconnections to avoid high stress concentrations and toachieve sufficient deformation capacity. The fatigue designof a VHSS structure needs more attention, as the fatiguestrength is not proportional to the yield strength. Specialattention has to be paid to the stiffness of a VHSS structureas the reduced dimensions may lead to more deflection anddynamic vibrations. The research project Integrity of HighStrength Steel Structures (IHSSS project) concerns the

(11.4) Test 16 (S960)

Figure 11: Illustration of the failure modes of severalspecimens

10

research into the design and fabrication of structures madeof VHSS with special emphasis on the structural safety. Dueto lack of data, most existing codes for steel structures arerestricting their scope to the steel grades up to yield strengthof 355 N/mm2. The EN 1993-1-1 – General Structural Rulesfor Steel Structures deals with steel grades to S460.Additional rules for the extension of EN 1993 to steel gradesS500 to S700 are given in EN 1993-1-12. The rules forfabrication are given in prEN 1090-2 “Execution of SteelStructures”. The sponsors of this project are steel suppliers,designers, fabricators and users of steel structures. The usersare interested in better operational performance (lighter,faster, higher loaded) than conventional structures.Fabricators are interested in economic production methods,fulfilling all requirements. The activities are concentratedon two areas of interest, fabrication and structural design.

(13.1) X-joint with low SCF (13.2) X-joint with low SCF

Figure 13: Test rigs in Stevin II Laboratory for static and fatigue tests

TNO Institute of Industrial Technology carried out thefabrication work package. TNO Building and ConstructionResearch and Delft University of Technology considered thestructural design. Figure 12 show the test specimen andFigure 13 show the test equipment used.

Composite Steel Concrete Structures

Although in many cases the steel industry is in competitionwith the concrete industry, there is a huge potential forcooperation in designing and building composite steel-concrete structures using high-performance steel and high-performance concrete. In Figure 14 an artist impression isgiven of a composite bridge structure where a truss steelstructure is combined with a concrete deck.

11

Figure 14: Artist impression of a composite steel-concrete bridge

The use of high strength steel cast nodes in these trussstructures will lead to a considerable improvement of thefatigue strength. Research in this area is underway at theStevin II Laboratory.

Concluding Remarks

The use of modern high-performance steel types provideslarge potential for the steel industry. For getting the steelindustry in the position to exploit these posibilities to their

Society Events

1/10/07 commencement 5th Intake: Certification Course for Structural Steel Supervisors (StS)[www.bca.gov.sg/academy]

11-15/10/07 9th International Conference on Steel, Space and Composite Structures SS07(Yantai/Beijing, China) [www.cipremier.com]

5-7/12/07 5th International Conference on Advances in Steel Structures ICASS 2007[www.icass2007.org]

Early 2008 commencement 2nd Intake: Certification Course for Structural Steel Engineers (StEr)[www.bca.gov.sg/academy]

full extent all restraints in doing so need to be resolved byexecuting research programs influenced and supported bythe steel industry. Design rules supported by sufficienttheoretical and experimental evidence, resulting from thatresearch, are highly needed. These rules need to be debatedextensively among researchers and practicioners together.Finally these rules need to be implemented in the appropriatedesign codes. The Eurocode 3 “Design of Steel Structures”froms an excellent platform for these rules to be usedworldwide.

12

Corus InternationalCorus International specialises in putting together steel relatedproduct and service packages to customers throughout theworld. International is a fast-growing business with salesvolumes currently totalling 8 million tonnes per annum throughits 70 market offices spread across international markets.

Mill SalesMill sales represents Corusmills in the market and isf o c u s e d o n d e l i v e r i n gmaximum value for Corus andproviding a seamless service forcustomers.

ProjectsProjects focuses on providingspecialist supply packages tocustomers with requirementsfor steel and other metals. Major markets include oil and gas,engineering and infrastructure. Projects adds value by offeringshipping and financing services combined with comprehensivetechnical support to ensure the customer receives a completesolution for any given project.

TradingCorus InternationalTrading specialises insourcing and supplyinghigher volume steel andr e l a t e d p r o d u c t sthrough an extensivenetwork of marketoffices throughout theworld. In addition, Corus International Trading can also providea range of logistical and financial services.

Tata SteelAs of April 2007 Corus is a subsidiary of Tata Steel. Togetherwith Corus, Tata Steel has 84,000 employees and a crude steelproduction of 27 million tonnes, making it the 5th largest steelproducer in the World.

ContactBernard Chung (Sales and Technical Manager)

Corus South East Asia Pte Ltd24 Raffles Place #13-02 Clifford CentreSingapore 048621Tel: +65 6297 6678 Fax: +65 6297 6682Singapore@corusgroup.comwww.corusasia.com

Global Steel Packages

SSSS Structural Steel DesignAwards 2007

Entries Received :

A) Building Structures Category1) Fusionopolis Phase 1 @ one-north

• JURONG Consultants• JTC Corporation• Shimizu Corporation• Yongnam Engineering &

Construction Pte Ltd• Kisho Kurokawa Architects &

Associates

2) Square 2• KTP Consultants Pte Ltd• Far East Organisation• DP Architects• China Construction (South

Pacific) Development Co Pte Ltd• The 22nd Metallurgical

Construction Corporation ofChina (Singapore Branch)

3) The New Supreme Court Building• CPG Consultants Pte Ltd• Supreme Court of Singapore• Foster and Partners• IRE - Sato Kogyo Joint Venture• TTJ Design & Engineering Pte

Ltd

B) Non Building Structures Category1) Alexandra Link Bridge

• ECAS-EJ Consultants Pte Ltd• Urban Redevelopment Authority• Look Architects• CKT Thomas Pte Ltd• Yongnam Engineering &

Construction Pte Ltd

2) Jurong West Sports Complex

• Parsons Brinckerhoff Pte Ltd• Singapore Sports Council• ECP Architects International• Sanchoon Builders Pte Ltd• TTJ Design & Engineering Pte

Ltd

3) Singapore Flyer Giant Observation Wheel

• Mitsubishi Corporation• Singapore Flyer Pte Ltd• Mitsubishi Heavy Industries Ltd

New Products & Services

13

14

New Products & Services

TTJ Design and Engineering Pte Ltd has from its humble

beginnings as Teo Contractor in 1975 transformed into a leading

structural steel specialist around the region. TTJ is able to undertake

design, engineering, fabrication and installation of structural

steelworks. TTJ’s greatest strength is in its innovative approach

in handling heavy structures and complex construction.

It has over the years completed many outstanding projects in

various industrial, commercial and governmental sectors in

Singapore, Middle East, Sri Lanka, Papua New Guinea and so on,

earning itself numerous accolades in quality, safety, design and

performance from clients and the authorities. The notable latest

overseas projects include Shiplift & Transfer System in Dubai,

Spire & Wind Turbine Bridges for the World Trade Centre in

Bahrain and Japan Ambassador Residence in Sri Lanka. TTJ is

also involved in the Marine, Oil & Gas industry, executing small

modular structures in TTJ’s factory.

TTJ is committed to providing quality products and services that

meet it’s clients’ requirements. It obtained certification for the

Integrated Management System ISO 9001:2000, ISO 14001:1996

and OHSAS 18001:1999 in the design, fabrication and erection

of structural steelworks. The certification of the Integrated

Management System demonstrates TTJ’s long term commitment

in providing quality services to her customers at all times,

environmental awareness and greater concern for health and safety.

In addition, it is an important milestone in TTJ’s pursuit of business

excellence.

TTJ has been an accredited structural steel fabricator for Category

S1 by the Singapore Structural Steel Society. TTJ has been

qualified by Singapore Accreditation Council (Accredited

Inspection Body) to be an approved Type ‘C’ Structural Steel

Inspection Body.

With its in-house design and engineering capabilities, modern

factories with advanced machinery in both Singapore and

Malaysia, TTJ is well positioned to undertake big-scale design

and build projects and projects of complicated nature with

structural steelwork both locally and abroad.

Fabricate & Assembly of

Shale Shaker House,

Singapore

TTJ

TTJ DESIGN & ENGINEERING PTE LTD

Republic Polytechnic Sports Complex, Singapore

Yongnam Holdings Limited is a leading Singapore-based multi-disciplinary engineering and construction services provider withmore than 30 years experience. Established in 1971, Yongnamhas grown over the years from a small local service provider inmechanical engineering into today’s leading multi-disciplinaryengineering and construction group of companies in specialiststructural steel engineering. Yongnam Holdings is incorporatedin 1994. It is listed on the Main Board of the Stock Exchange ofSingapore since 1999. The Group is headquartered in Singaporeand has 9 subsidiaries maintaining regional offices in Singapore,Malaysia, Thailand, Hong Kong, Middle East and China.

With more than 30 years ofexperience in steel fabrication,the Group operates three corebusiness divisions in StructuralSteelwork, Specialist CivilEngineering and MechanicalEngineering. In steelworkfabrication, Yongnam operates inTuas a plant of 20,250 sq mcovered area on 76,000 sq m oftotal factory space, the largest inSingapore. Together, the Tuasfacilities, skilled manpower,

advanced CNC machines and Malaysian plant support an annualcapacity of 45,000 tons.

Yongnam aims is to provide clients in the construction industrywith steel fabrication of the highest quality in the most timely andefficient manner possible. The number one priority is responsive,personalized service regardless of job size or complexity. Thecompany has built an enviable reputation through close client co-operation and consistent delivery of highly-demanding andtechnically challenging quality products on time and within budget.

Second InternationalAirport, Bangkok

Fusionopolis, Singapore

Airport Roof Truss, Singapore Seraya Chemical Phase 2, SingaporeSSSS Merit Award Winner

Shiplift & Transfer System, Dubai

Aircraft Maintenance Hangar, Singapore Changi Airport Terminal 2, Singapore

World Trade Centre Spire, Bahrain(Erection only)

Supreme Court Building, Singapore

Wind Turbine Bridges, WTC Bahrain(Erection only)

One Raffles Quay, Singapore(Fabrication 6,500 tons)

Kong Meng San Temple, SingaporeSSSS President’s Award

Blast Door, Singapore

No. 57 Pioneer Road, Singapore 628508. Tel: (65) 68622126 Fax: (65) 68620284Email: ttjde@ttj.com.sg Website: www.ttj.com.sg

• Accredited Structural Steel Fabricator for Category S1

• Type ‘C’ Structural Steel Inspection Body - SAC

(Accredited Inspection Body)

YOUR PARTNER IN STEEL

Petrochemical, Oil and Gas ProjectsPharmaceutical PlantWafer Fabrication PlantMicroelectronics PlantWater and Sewage Treatment WorksHigh-rise and Low-rise Buildings

Factories and WarehousesMRT and LRT StructuresMarine StructuresAircraft HangarsVehicle ParapetsFormworksMobile Aerial LiftsDockarms & Shipyard Cranes

Marine Deck Cranes and WinchesConstruction Lifting EquipmentSpecial Purpose MachineryOverhead Cranes and LaunchersCivil Defence Shelters and BlastDoorsBearings and Expansion Joints forHighways

Coke Calcining Plant, Bahrain(Erection only)