The purpose of this study is to increase applicability of high strength steel, HSA800 to the structure. Selected study of structure is to consider high strength steel, and following parts, 1) Tensile member with no consider of buckling, 2) Truss existing both tension and compression members with small slenderness ratio. This studied structure is included tension column hang on to the upper bridge truss. The structure element quantity with apply HSA800 instead of SM570 is reduced about 38.9% of tension column and 29.7% of bridge truss. In addition, the number of element's division is reduced about two sections due to reduction of self weight that the crane is able to lift up. This improves to reduce erection sequence and construction period which can save about a month. All connections are reviewed as welding and bolt. Also, the cost of welding is reduced about 41.3% due to apply HSA800. In conclusion, applying HSA800 to the hanging structure aggressively can secure economic and constructability.

 Abstract  1. 서 론  2. 검토대상 건물  3. 트러스   3.1 Bridge Truss 소개   3.2 Bridge Truss 사용성 평가   3.3 Bridge Truss 응력 평가   3.4 Bridge Truss 물량 평가   3.5 Tension Column 응력 평가   3.6 Tension Column 물량 평가  4. 양중계획   4.1 양중능력을 고려한 분절계획   4.2 양중을 고려한 용접부 검토   4.3 양중을 고려한 

• 김인호(포스코건설 R&D Center 기술연구소, 차장, 공학박사) | Kim, In-Ho
• 이희수( CS 구조엔지니어링, 공학석사) | 이희수
• 박성용( CS 구조엔지니어링, 공학박사) | 박성용
• 김종수( CS 구조엔지니어링, 공학석사) | 김종수