BNG CONSULTANTS / BNG VINA

Transcription

1 Rev.07 BNG CONSULTANTS / BNG VINA Since English BNG CONSULTANTS Co., Ltd.

2 Engineering - Design Review - On-site Technical Support - Construction Stage Analysis Construction Research and Development - Construction Management - Supervision of Project - High Quality Construction - Research on Construction Technology - Development of New Excellent Technology

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7 BNG CONSULTANTS / BNG VINA BNG BRIDGE Cable-Stayed Bridge Cable-Stayed Bridge A cable-stayed bridge is a bridge that consists of one or more columns (normally referred to as towers or pylons), with cables supporting the bridge deck. Cable-stayed bridges may look similar to suspensions bridges-both have roadways that hang from cables and both have towers. But the two bridges support the load of the roadway in very different ways. The difference lies in how the cables are connected to the towers. In suspension bridges, the cables ride freely across the towers, transmitting the load to the anchorages at either end. In cable-stayed bridge, the towers form the primary load-bearing structure. A cantilever approach is often used for support of the bridge deck near the towers, but areas further from them are supported by cables running directly to the towers. This has the disadvantage, compared to the suspension bridge, that the cables pull to the sides as opposed to directly up, requiring the bridge deck to be stronger to resist the resulting horizontal compression loads; but has the advantage of not requiring firm anchorages to resist a horizontal pull as in the suspension bridge. All static horizontal forces are balanced so that the supporting tower does not tend to tilt or slide, needing only to resist such forces from the live loads. The steel-decked bridge designed at Stromsund by Franz Dischinger(1956) is therefore more often cited as the first modern cable-stayed bridge. The Tatara Bridge is a cable stayed bridge with a total length of 1480m and a center span of 890m which is the longest center span in the world. But The Sutong Changjiang Highway Bridge over the Yangtze River is seen under construction in east China s Jiangsu Province, April 23,2007. The cable-stayed bridge will have a world record 1088m main span and tallest cable towers when completed in 2008.

8 Sepung Bridge : Six-span cable-stayed bridge with continuous prestressed concrete box girder Design : Three pylon curved cable-stayed bridge with transverse cable Construction : Stiffening girder balanced cantilever method Pylon auto climbing form The harp system highlighted simplicity and open sight Installing RC strut to minimize self-weight & spectacle BNG CONSULTANTS / BNG VINA

9 Cable-Stayed Bridge Bridge Specifications Project Name Location Owner/ Client Contract amount National detour road construction of Gwangyang city Sepung-ri, Gwangyang-eup Seonghwang-dong Gwangyang-si, Jeollanam-do Iksan regional construction management administration Design 26.6 billion KRW Period Chung-Suk Eng. Corp. Oct ~ Jun Inner struts : Steel strut / C.T.C 6.0m Outer struts : R.C strut covered with FRP / C.T.C 3.0m Overview Span Width Design load Continuous six-span cable-stayed bridge (three pylon and single cable plan) @ = 725m (main span length = 220m) DB-24, DL m (4-lanes) Design velocity 80km/hr Remarks Pylon height / Span ratio : 24% Cable anchorage by 1 Cell PSC girder and steel frame PSC box girder with strut Deck System Height 3.3m Design wind velocity Seismic system Pavement Depth/Width ratio 53.7m/sec Seismic Isolated system using friction & elastomeric bearing Asphalt (t=80mm) 13.3% Slab Construction PSC concrete deck slab (fck=40mpa, tendon=0.6in-4ea) Balanced cantilever method Seismic isolated system using elastomeric & friction bearings Controling pylon deflections and minimizing the cross sectional area of pylon by transverse cables Parallel strand cable (fpu=1,860mpa) Subcontractor Dywidag-Systems International Section Φ15.7mm-48 61ea, A= cm 2 Cable Diameter mm Weight 4,125kN Length 24.8m 132.2m, 90stays Arrangement Semi-harp (space=6m) Construction of the superstructure I-type concrete pylon Height 52.0m Pylon / Foundation Pylon Foundation Material Construction Material Construction Concrete : fck=40mpa, 126m 3 Reinforcement : fy=400mpa Auto climbing form PY1,3 : Φ2.0m, 4x4=16ea Drilled shaft PY2 : Φ2.0m, 5x4=20ea Concrete : fck=24mpa Reinforcement : fy=300mpa RCD Cable erection & anchorage Sepung Bridge 7 8

10 Baekseok Bridge : Four-span cable-stayed bridge with continuous prestressed concrete box girder Design : Land mark of the local area Construction : Stiffening girder full staging method Pylon auto climbing form Night view Full view of the bridge BNG CONSULTANTS / BNG VINA

11 Cable-Stayed Bridge Bridge Specifications Name Choji Bridge ~ Incheon (2-2section) load Construction Project Location Owner/ Client Gyeongseo-dong, Seo-gu, Incheon-si GS Construction Co. Ltd., Design - Contract amount 31,660 million KRW Period July ~ Oct Four span cable-stayed bridge and three span approach-1 bridge, two span approach-2 bridge Overview Span Width Design load @50=749m (main span length = 409m) DB-24, DL m ~ 36m (6-lanes) Design velocity 80Km/hr Remarks Pylon height / Span ratio : 12% Two pylon and double cable plan Full view of the bridge PSC box girder (4-Cell) Height 5.1 ~3.0 m Depth/Width ratio 12.6% Deck System Design wind velocity Seismic system Pavement 45.2m/sec - PSMA (t=80m) Slab Construction PSC concrete deck slab (fck=45mpa) Full Staging Method Form work by full staging method Parallel Wire Strand (PWS) Subcontractor - Section A=71.97~113.53cm 2 Cable Diameter - Weight - Length 26.9m ~ 114.3m, 96stays Arrangement Semi-harp Under view of the bridge H-type concrete pylon Height 50.0m Pylon / Foundation Pylon Foundation Material concrete : fck=45mpa Reinforcement : fy=400mpa Construction - - Material Construction concrete : fck=27mpa Reinforcement : fy=400mpa RCD Construction of the superstructure Baeksuk Bridge 9 10

12 Kimpo Bridge : Two-span cable-stayed bridge with continuous steel composite box girder Design : Land mark of the local area Construction : Stiffening girder full staging method Pylon steel box Cable erection Full view of the construction BNG CONSULTANTS / BNG VINA

13 Cable-Stayed Bridge Bridge Specifications Project Name Location Owner/ Client Contract amount Kimpo Yangchon land development project creating work (2section)/cable installation construction Yanggok-ri, yangchon-myeon, kimpo-si, Gyeonggi-do Daewoo Construction Co. Ltd., Design Saman eng 876 million KRW Period Nov ~ Mar Before erection of the cable Two-span cable-stayed Bridge (one pylon and single cable plan) Span = 110m Overview Width Design load DB-24, DL m (4-lanes) Design velocity - Remarks Pylon height / Span ratio : 42.7% Cable anchorage Steel composite box girder Height 2.0m Depth/Width ratio 9.6% Deck System Design wind velocity Seismic system Pavement m/sec - Asphalt (t=80mm) Slab concrete deck slab (fck=30mpa) Construction Full Staging Method Cable erection SWPC7 (fpu=1,860mpa) Subcontractor Section Dywidag-Systems International Φ15.7mm-27ea, A=40.5cm 2 Φ15.7mm-37ea, A=55.5cm 2 Cable Diameter 160mm ~ 180mm Weight - Length 30.8m ~ 70.9m, 10stays Arrangement - Perspective view on the road Steel box Height 32.0m Pylon / Foundation Pylon Foundation Material Concrete : 27MPa Reinforcement : 400MPa Construction - Material PIle foundation concrete : 24MPa(A1), 27MPa(A2) Reinforcement : 300MPa(A1), 400MPa(A2) Construction - Erection of girders ( full staging method ) Kimpo Bridge 11 12

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15 BNG CONSULTANTS / BNG VINA BNG BRIDGE Extradosed Bridge Extradosed Bridge This type of bridge was first proposed by Jacques Mathivat in The tendons are arranged outside the girders, which are inside conventional girder bridges. It results in the prestressing forces with greater eccentricity acting more effectively on the main girder. The external appearance resembles cable-stayed bridges, but the structural characteristics are comparable to those of girder bridges. The distinctive features of extradosed bridges are as the followings. Applying external prestressing, the girder height can be set shorter than that of standard girder bridges. The cables (prestressing tendons outside the girders) need no tension adjustment necessary for cable-stayed bridges, and can be treated as usual tendons in the girder bridge. The height of pylons can be as half as those of cable-stayed bridges, therefore easier construction can be executed. With small stress fluctuation under live load, the anchorage method for the stayed cables can be the same as that of tendon inside the girder, then the excess cost can be cut. It is the best choice that application of this type bridge to a bridge with main span of 110~200m.

16 Hwangdo Bridge : Three-span extradosed bridge with continuous prestressed concrete box girder Design : Land mark of the local area Construction : Stiffening girder balanced cantilever method Pylon climbing form Night view Full view of the bridge BNG CONSULTANTS / BNG VINA

17 Extradosed Bridge Bridge Specifications Name Bridge Construction of Hwangdo bridge Project Location Owner/ Client Contract amount Changgi-ri, Anmyeon-eup, taean-gun, Chungcheongnam-do Hansol Construction Co. Ltd., Design 53.9 million KRW Period Yooshin Eng. Corp. Jangmaek Eng. Corp. July ~ Aug Cross section of the girder ( 2 Cell PSC girder ) Span Continuous three-span extradosed bridge (two pylon and double cable plan) = 300m Overview Width Design load DB-24, DL m (2-lanes) Design velocity - Remarks Pylon height / Span ratio : 10% Cable erection PSC box girder (2-Cell) Height 4.0m~2.5m Depth/Width ratio 22.6% Deck System Design wind velocity Seismic system Pavement 44.41m/sec - Ascon (t=80mm) Slab Concrete deck slab (fck=40mpa) Construction Balanced Cantilever Method Construction of the superstructure SWPC7B (fpu=1,900mpa) Subcontractor - Section Φ15.2mm-33ea, A=45.771cm2 Cable Diameter - Weight - Length 18.3m ~ 55.6m, 48stays Arrangement - Perspective view on the road H-type concrete pylon Height 14.0m Pylon / Foundation Pylon Foundation Material Concrete : fck=40mpa Reinforcement : fy=400mpa Construction - Material Direct Foundation Concrete : fck=30mpa Reinforcement : fy=400mpa Construction - Under view of the bridge Hwangdo Bridge 15 16

18 Gangchon Bridge : Three-span extradosed bridge with continuous prestressed concrete box girder Design : Land mark of the local area Construction : Stiffening girder balanced cantilever method Pylon climbing form Construction of the pylon Form work for piertable BNG CONSULTANTS / BNG VINA

19 Extradosed Bridge Bridge Specifications Name Changchon bridge Construction Project Location Owner/ Client Contract amount Banggok-ri, Namsan-myeon, Chuncheon-si, Gangwon-do Geumho Construction Co. Ltd., Design 8,580 million KRW Period Pyunghwa eng Daeho eng May ~ Jan Cross section of the girder ( 3 Cell PSC girder ) Span Continuous three-span extradosed bridge (two pylon and double cable plan) = 306m Overview Width Design load DB-24, DL m (4-lanes) Design velocity Remarks Pylon height / Span ratio : 12.9% - Cement Grout Strand detail PSC box girder (3-Cell) Height 2.75m ~ 5m Depth/Width ratio 19.7% Deck System Design wind velocity Seismic system Pavement m/sec - Ascon (t=80mm) Slab Concrete deck slab (fck=40mpa) Construction Balanced Cantilever Method Climbing form installation SWPC 7B (fpu=1,860mpa) Subcontractor - Section Φ15.7mm-27ea, A=40.5cm 2 Cable Diameter 160mm Weight - Length 21.7m ~ 53.0m, 40stays Arrangement - Perspective view on the road H-type concrete pylon Height 18.0m Pylon / Foundation Pylon Foundation Material Concrete : fck=40mpa Reinforement : fy=400mpa Construction - Material Direct Foundation Concrete : fck=27mpa Reinforement : fy=400mpa Construction - Full view of the bridge Gangchon Bridge 17 18

20 Yongjin Bridge : Three-span extradosed bridge with continuous prestressed concrete box girder Design : Land mark of the local area Construction : Stiffening girder balanced cantilever method Pylon climbing form Pylon 1 & 2 Fabrication of the piertable BNG CONSULTANTS / BNG VINA

21 Extradosed Bridge Bridge Specifications Project Name Location Owner/ Client Contract amount Between Sang-ri Yongjin lanes extension, paving Construction Sang-ri, youngcheon-myeon, Danyang-gun, Chungcheongbuk-do Byeoksan Construction Co. Ltd., Design - 5,874 million KRW Period Jun ~ Dec Cross section of the girder ( 3 Cell PSC girder ) Span Continuous three-span extradosed bridge (Two pylon and double cable paln) = 300m Overview Width Design load DB-24, DL m (2-lanes) Design velocity - Remarks Pylon height / Span ratio : 10% Construction of the pile cap PSC box girder (3-Cell) Height 2.5m ~ 4.5m Depth/Width ratio 22.6% Deck System Design wind velocity Seismic system Pavement 37.5m/sec - SMA (t=80mm) Slab Concrete deck slab (fck=40mpa) Construction Balanced Cantilever Method Construction of the pylon ESMP 7B (fpu=1,900mpa) Subcontractor Section Φ15.2mm-27ea, A=37.45cm 2 Cable Diameter 165mm Weight - Length 23.8m ~ 50.1m, 64stays Arrangement - Perspective view on the road V-type concrete pylon Height 13.5m Pylon / Foundation Pylon Foundation Material Construction Material concrete : fck=27mpa Reinforcement : fy=400mpa Climbing form Direct Foundation(A1), steel pipe pile(a2) concrete : fck=24mpa Reinforcement : fy=300mpa Construction - Full view of the bridge Yongjin Bridge 19 20

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23 BNG CONSULTANTS / BNG VINA BNG BRIDGE PSCBoxGirder Bridge ILM (Incremental Launching Method) BCM (Balanced Cantilever Method) FSM (Full Span Method)

24 PSC Box Incheon Bridge ILM : 25-span girder bridge with continuous prestressed concrete box girder Construction : Girder incremental launching method Longest bridge by ILM in Korea Front view Full view of the construction Temporary pier for launching Fabrication of the launching nose Concreting of the superstructure Full view of the Incheon bridge construction BNG CONSULTANTS / BNG VINA 23

25 PSC Box Unnam Bridge ILM : 5-span girder bridge with continuous prestressed concrete box girder Construction : Girder incremental launching method Approach bridge 2 places ( wide bridge by 4-lanes ) Full view of the construction Casting yard Prefixing yard for the reinforcement of webs and bottom slab Concreting of the superstructure Launching Full view of the bridge BNG CONSULTANTS / BNG VINA 24

26 PSC Box Oepo-1 Bridge ILM : 8-span girder bridge with continuous prestressed concrete box girder Construction : Girder incremental launching method Curvature radius R=500m Full view of the construction Concreting of the substructure Casting yard Prefixing yard for the reinforcement of webs and bottom slab Form work Concreting of the superstructure BNG CONSULTANTS / BNG VINA 25

27 PSC Box Daeho Bridge BCM : 3-span girder bridge with continuous prestressed concrete box girder Construction : Girder balanced cantilever method Form Traveller 2-Set Full view of the construction Construction of the pier table segment Installation of the form traveller Key-segment closure by the form traveller Construction of the superstructure Under view of the bridge BNG CONSULTANTS / BNG VINA 26

28 PSC Box Ipo Weir Bridge BCM : 5-span girder bridge with continuous prestressed concrete box girder Construction : Girder balanced cantilever method Form Traveller 2-Set Full view of the construction Installation of the pier bracket Construction of the pier table segment Form traveller Concreting of the superstructure Bird's-eye view BNG CONSULTANTS / BNG VINA 27

29 PSC Box Baekseok Bridge BCM : 3-span girder bridge with continuous prestressed concrete box girder Construction : Girder balanced cantilever method Form Traveller 2-Set The figure of the completed construction Full view of the construction Installing longitudinal and transverse tendon Concrete pouring Form traveller cap for crossing the road Under view of the bridge BNG CONSULTANTS / BNG VINA 28

30 PSC Box Osong Highspeed Railway Bridge BCM : 9,6,3-span girder bridge with continuous prestressed concrete box girder Construction : Girder balanced cantilever method Form Traveller 4-Set Bird's-eye view Full view of the construction Concreting of the segment Form traveller Under view of the construction site Gyeongbu highspeed railway beside the construction site BNG CONSULTANTS / BNG VINA 29

31 PSC Box Thanh-an Bridge ( VIETNAM ) BCM : 5-span girder bridge with continuous prestressed concrete box girder Construction : Girder balanced cantilever method Form Traveller 4-Set 3D concept drawing of the bridge Construction site view of P11 and P10 Installation of the coffer dam for P12 Construction of seal concrete and pile treatment Construction of coping for P12 P12 Completion BNG CONSULTANTS / BNG VINA 30

32 PSC Box Honam Highspeed Rail Bridge 3-3 Section Full Span Method : Simple span prestressed concrete box girder bridge by full span method Construction : Girder manufacturing in the casting yard (pre-tensioning method) Erection Special Trolley 1-Set Erection equipment (Special Trolley) Transportation of the rebar cage Installing of the rebar cage in the outer mould Pull out of the Box girder Girder & Special Trolley on the Under Bridge PSC box girder erection BNG CONSULTANTS / BNG VINA 31

33 BNG CONSULTANTS / BNG VINA BNG BRIDGE DECK ( FULL DEPTH ) Precast PSC Panel New Repair Replacement FULL DEPTH PRECAST PSC DECK PANEL

34 Bridge Deck Seocheon Bridge Precast PSC Panel : 25-span continuous steel composite box girder bridge with precast PSC deck Construction : Girder Steel composite box girder Slab Full depth precast PSC deck panel Full view of the construction Manufacturing of the panel : Form work Manufacturing of the panel : Concrete work Stacked panel on the factory Installed panel Cast-in-place work BNG CONSULTANTS / BNG VINA 33

35 Bridge Deck Oryun Bridge Precast PSC Panel : 2-span continuous steel composite box girder bridge with precast PSC deck Construction : Girder Steel composite box girder Slab Full depth precast PSC deck panel for repair 1 st and 2 nd step of the construction 3 rd and last step of the construction Remove of the established slab Site view of the removed slab Installing panel Longitudinal prestressing of the precast panel BNG CONSULTANTS / BNG VINA 34

36 Bridge Deck Bucheon Over Bridge Precast PSC Panel : Emergency recovery work about partially damaged bridge by fire Construction : Girder Steel composite box girder Slab Full depth precast PSC deck panel Damaged bridge by fire Partially removed bridge Installing of the steel box girder Installing of the precast PSC deck panel Night work Completion of the emergency recovery work BNG CONSULTANTS / BNG VINA 35

37 BNG CONSULTANTS / BNG VINA BNG BRIDGE DECK ( HALF DEPTH ) Precast PSC Panel PLP ( Pretension Loop-Jointed Panel ) Patent ( Korea ) Pre-tensioning HALF DEPTH PRECAST PSC DECK PANEL

38 BNG CONSULTANTS / BNG VINA BNG BRIDGE ( PSC Beam ) PnP Girder Preloading & Progressive Patent ( Korea / USA / China ) Precast PSC Deck Post-tensioning PSC BEAM with FULL DEPTH PRECAST PSC DECK

39 BNG Bridge Construction Sequence PnP GIRDER STEP-1. Arranging Rebar, Sheath and Sole Plate STEP-2. Assembling Steel Form STEP-3. Stressing 1 st Tendons and Grouting STEP-4. Erection of PnP Girder STEP-5. Cross Beam STEP-6. Erection of Precast Deck STEP-7. Stressing Tendon for Precast Deck STEP-8. Completion BNG CONSULTANTS / BNG VINA 38

40 BNG CONSULTANTS / BNG VINA BNG BRIDGE ( PSC Beam ) PbP Girder Precast bed Pretension Patent ( Korea ) Pre-tensioning KOREA RAIL New Technology ( ) PRE-TENSIONING PSC BEAM using PRECAST BED

41 BNG Bridge Construction Sequence PbP GIRDER STEP-1. Setting and Cleaning Steel Form STEP-2. Arranging Sole Plate, Rebar Jig and Strand STEP-3. Arranging Strand to the Tensioning Unit STEP-4. Assembling Steel Form & Inspection STEP-5. Installing End Form & Stressing Strand STEP-6. Pouring and Curing Concrete STEP-7. Dismantling Steel Form & Detensioning Strand STEP-8. Transportation of Girder to Stock yard BNG CONSULTANTS / BNG VINA 40

42 BNG CONSULTANTS / BNG VINA BNG BRIDGE Specification Construction Experience

43 BNG Bridge Specification Name Construction Period Span(m) Girder Width(m) Lanes No. of Pylon Cable Saecheonnyeon ~ =1004 PSC box 12.5~ Cable stayed bridge Baeksuk Sepung ~ ~ @50= @ =725 PSC box 32.1~ PWS PSC box PSS Kimpo ~ =110 Steel box Extradosed bridge Hwangdo Gangchon Yongjin ~ ~ ~ =300 PSC box =306 PSC box =300 PSC box Name Construction Period Span(m) Width(m) Girder Remarks Yeongro ~ @105+70= PSC box Osong ~ a down line : 70+7@ @ =960 an up line : 70+4@ @85+70=960 7 PSC box FCM Gongdo Samtan ~ ~ @ = PSC box @ = PSC box Daeho ~ = PSC box Baeksuk ~ = ~36 PSC box Thanh-an ~ @90+60= PSC box Overseas VIETNAM Honam Highspeed Railway 5-2section ~ @30-1span=30, 1@35-13span=455, 1@40-62span= PSC box Highspeed Railway PSC Box FSM Honam Highspeed Railway 5-3section GyeongBu Highspeed Railway Kimcheon station ~ ~ @30-2span=60, 1@40-21span=840 1@35-1span=35, 1@45-1span=45, 1@50-27span=1350, 1@55-2span= PSC box PSC box Highspeed Railway Highspeed Railway Daeho ~ @50= PSC box Gamcheon ~ @50= PSC box Bosung ~ @ = PSC box Unnam ~ @ = PSC box ILM Incheon Pyeongdong ~ ~ @50=1, PSC box Muan : 45+13@55+45=805 Gwangju : 45+4@55+2@43+7@55+45= PSC box Onsu ~ @50+40= PSC box Oepo ~ @50+40= PSC box Sinyoung ~ @50+40= PSC box BNG CONSULTANTS / BNG VINA 42

44 BNG Bridge Specification Name Construction Period Span(m) Width(m) Girder Remarks Nohyeon ~ PSC box PSC Box ILM PSM Geumho Poongse Haewol Honam Highspeed Railway 3-3section Poseung ~Pyeongtaek 1section ~ ~ ~ ~ ~ Dongdaegu : 10@50+2@55+2@40+2@50+40=830 Busan : @50+2@55+2@40+2@50+40= PSC box 40+12@55+40= PSC box 4+12@50+40= PSC box 1@30-31span=930, 1@35-124span= PSC box Highspeed Railway 1@35-223pan= PSC box Railway Name Construction Period Span(m) Width (m) Length (m) Height (m) Q ty (ea) Remarks Baekgok IC 1@45= Cheongyang~ Wooseong 2 section Jeongsan IC 1@45= ~ (30m), Jeongsan = (45m) Daepyeong-2 2@40= Ipseok-2 (3@40)x2= Bohyeon -mountain Multipurpose Dam Hasong 3@40= ~ Gumi 1@30= PSC I-beam PnP Girder Pyeongtaek ~siheung 1 section Jungbang-1 Bohyeon 1@35= ~ @ Geumui ~ 1@35= Jangan IC 1@30= Pyeongtaek ~siheung 4 section Singilcheon ~ @35+2@35+3@40+ (3@40)x5= (35m) 180(40m) Hwanggeum ~ @40= (side) 15(main) Yusung IC ~ @40= Uihyeon ~ @40= Hangye ~ @50= PbP beam Haman~Jinju (Gyeongjeon line) Hyundae Daewoo ~ ~ , (25m) 1,063 Railway BNG CONSULTANTS / BNG VINA 43

45 BNG Bridge Specification Name Construction Period Span(m) Width (m) Length (m) Width (m) Deck Length (m) Depth (mm) Remarks Busan-Geoje (Cheonseong-Nulcha) 1 section/hoecharo ~ @40= Gujeung @ = Precast PSC deck panel ( Full Depth ) Yongjeong ~Yongjin Jeonjucheon Yongin~Seoul 3 section/daejang-2 Busan~Geoje/ Cable-stayed Br. PC-pannel/ Jeodo Br ~ ~ ~ @47.5= @55= Seocheon ~ =1, ~ Oryun ~ = Bucheon ~ @60= Company History Jun Established BNG Consultants construction Co.,Ltd. Nov Established BNG Consultants construction technology institute May Appointed as new technology ( No. 281 ) Oct.2007 Confirmed as venture company from Technology Evaluation Assurance Company (Korea Technology Finance Corporation) Nov Appointed as new technology ( No. 542 ) Jan.2008 Selected as management innovation type small and medium company by Gyeonggi province Small & Medium Business Administration Dec Appointed as new technology ( No ) BNG CONSULTANTS / BNG VINA 44

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