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| 1980.06. | Establishment of DAE CHANG STEEL Corporation on the 10th. Designated by POSCO as the cold rolling sales shop. | |
| 1991.04. | Cheonan Factory in Chungnam completed. (COIL CENTER) |
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| 1994.08. | Head Office building & the 1st Factory in Incheong Namdong Industrial Complex completed. (COIL CENTER) |
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| 1996.06. | ACCESS FLOOR Beginning of Flooring business. (Acquired Professional Construction License, Incheon 96-12-5) |
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| 1996.12. | The 2td Factory in Incheong Namdong Industrial Complex completed. (COIL CENTER & ACCESS FLOOR factory) |
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| 1997.08. | ISO 9001 및 9002 achieved qualification system certification | |
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| 2000.12. | Asan Factory in Chungnam completed. (COIL CENTER) |
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| 2001.03. | Installation & Construction field-Technology development & Steady construction award Certificate (Incheon Mayor) |
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| 2001.11. | Received ‘a million export tower’ on the 38th Trade Day (Presidential) Received an award certificate for contributing to the economic development on the 38th Trade Day (the Minister of Commerce, Industry and Energy) |
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| 2002.02. | Received an appreciation plaque from Korean Institute of Architects. | |
| 2002.06. | Registered the raised floor base & received KS certification. | |
| 2003.08. | Established the ERP & WEB CRM system. | |
| 2005.07. | Acquired Korean Industrial Standard KS certification | |
| 2005.11. | Aluminum Factory Facilities Operation started | |
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| 2006.07. | Established a new corporation, DAE CHANG AT | |
| 2006.12. | Memorandum of Understanding for Vietnamese land re-lease (Nhon Trach 5 Industrial Area 104,700㎡) |
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| 2007.01. | Residential contract for Paju Munsan Industrial Complex(Seonyu District) 4-1 Block (13,496.8㎡) | |
| 2007.03. | Established a corporation in Vietnam POS-DCS VIETNAM CO.,LTD | |
| 2008.06. | Building extension at Asan Factory completed & Combination Line Installed | |
| 2010.12. | Horizontal Tax Payment Compliance Contract (Jungbu Regional National Tax service, Republic of Korea) | |
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| 2011.03. | DAE CHANG STEEL, received ‘Korean Ethical Management Culture Management’ award | |
| 2011.10. | Paju Factory in Gyeonggi completed. (COIL CENTER & ACCESS FLOOR Factory) |
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| 2011.11. | Selected as Incheon Vision Company (Incheon Mayor) |
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| 2012.03. | Received an appreciation award for purchasing 5 million ton of products-POSCO (POSCO.co.,Ltd) |
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| 2013.04. | Moved the Head Office & Incheon Factory site for an expansion(9,380㎡)(COIL CENTER) |
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| 2014.03. | Partnership agreement-Manufacturing center in Chengtu, China (CDPC) |
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| 2014.04. | The 2nd Horizontal Tax Payment Compliance Contract (Jungbu Regional National Tax service, Republic of Korea) |
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| 2014.12. | Entered KOSDAQ Stock market | |
| 2015.05. | Subsidiary companies included to the major DAE CHANG AT | |
| 2015.08. | Operating the Pyeongtaek Factory (Wire rope) | |
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| 2016.12. | Received the 17th Korea Mecenat Conference "Art & Business" Prize | |
| 2017.01. | Received the 16th Seoul National University AMP Grand Prize | |
| 2018.10. | Suspension of production of Daechang AT aluminum | |
| 2019.12. | Suspension of wirerope production business at Sunjae Business Headquarters (Pyeongtaek Plant) | |
| 2020.11. | "2020 Contribution to the Promotion of Eco-friendly Technology and Consumption Promotion" Award in the Eco-friendly Product Division | |
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| 2021.03. | Buil Steel Co., Ltd. take over | |