# 부분 무기둥 비계구조 골조 거동에 관한 실험적 연구

• Son, Ki-Sang (Department of Safety Engineering, Seoul National University of Science and Technology) ;
• Jong, Jung Hee (Department of Safety Engineering, Seoul National University of Science and Technology)
• 손기상 (서울과학기술대학교 안전공학과) ;
• 정희종 (서울과학기술대학교 안전공학과)
• Accepted : 2013.04.10
• Published : 2013.08.31

#### Abstract

There is a critically structural problem of scaffolding system when one of scaffold columns is remove to be used as a gangway for their temporary office in the structure before finishing all such as an apartment or office building. This is not used to checking to structurally checking at a construction site. This study is to find out which system at a site will be more effective and low-cost-high effectiveness of aluminum ladder, timber ladder, ${\phi}$1/2 inch steel pipe truss with a type of concave, convex warren truss ladders. Theses are structurally tested with horizontal set as a truss type with 1.8 meter long. Concentrated load has been loaded at the upper center of the system and checked its strain at the bottom center, using aluminum-use strain gage and steel-use gauge have been attached concave warren truss with diameter 1/2 inch has 14% stronger than convex truss. Convex truss has almost same strength as an aluminum ladder truss, it is found out.

#### Acknowledgement

Supported by : 서울과학기술대학교

#### References

1. Ministry of Labor, "Rules for Industrial Safety and Health, pp. 359-402", www.moel.go.kr, 2012.
2. T. G. Kim, "Resistant Countermeasures for Building and Seismic Status in Korea", Housing and Urban, Vol. 84, pp. 61-62, 2005.
3. Y. C. NA, "an Experimental Study on the Resistant Capacity of Steel Scaffolding System", Masters Degree, Seoul National University of Science and Technology, pp. 32, 2007.