시스템비계의 좌굴 강도는 가새재 미설치 등 현장에서 발생할 수 있는 시공적 결함에 많은 영향을 받으며, 시스템비계의 강도를 예측함에 있어 단일 수직재에 대한 축력 실험을 근거로 측정된 좌굴 강도로부터 조립된 시스템비계의 정확한 극한강도를 예측하는 것은 어렵다. 또한 국외에서 연구된 조립 시스템비계는 국내에서 사용되는 시스템비계와 연결부 형태의 차이가 발생된다. 따라서 본 연구에서는 국내에서 주로 사용되는 시스템비계를 대상으로 실물실험을 통해 가새재 설치 유무와 수평방향 단수(bay)의 변화에 따른 조립된 시스템비계의 극한하중 변화를 분석하였다.

This experimental study analyzed the reduction of the load capacity of the system support according to the uninstall bracing members by loading the ultimate load to the 3 - story system support assembly with the presence of bracing members as the key parameter. The load capacity of the 3-story specimen without bracing members is 38.4% of that of the 3-story specimen with bracing members. It is necessary to accurately reflect the installation plan of the bracing members and examine the structural safety of the system support assembly, not a single member, because there is a significant decrease in the load capacity of the system support assembly according to the uninstall of the bracing members.

This paper developed the guideline for the safety and health(S&H) file drawn by a client in construction plan stage. According to the announcement of revised Occupational Safety Health Act(February 9, 2018), the construction client should make or manage the three S&H files in the plan, design, and work stages respectively. By analyzing S&H management systems led by the client and surveying the opinion of construction participators, the contents and practical method of the S&H file in the plan stage was proposed. Client should control hazard in construction site through the S&H file. And, it should include important S&H condition dealt with design and work stages as well as selection method of competent designer and contractors with S&H capacity.

This paper presents basic data to enhance the performance of safety check systems by analyzing the status of participants in the construction industry on the Periodical safety check system. The survey was conducted by the client, supervisor, and contractors. It is judged that it is possible to enhance the performance of the peer review system by expanding the participation of other highly recognized participants in the construction industry. It is deemed necessary to set up a monitoring system to monitor the check detai

According to this study, small-scale construction projects with a construction value of less than 300 million won are placed in the blind spot of safety management inspection. Therefore, it is necessary to improve the management and inspection system that reflects characteristics of small-scale construction sites.

This paper analyzed the effects of rotational stiffness of wedge connection between vertical and horizontal members of system supports. By simulating the connection condition both a hinge connection, which is considered in the design stage, and a spring with the rotational stiffness reflecting the actual behavior, the critical buckling load and the maximum combination stress ratio are compared. The results show that hinge condition somewhat underestimate the actual behavior of vertical members of system supports. However, it is also noted that the horizontal member represents the increased stress due to the rotational stiffness of the connection.