The use of hanging scaffolding for exterior wall painting and cleaning in building construction and maintenance carries the inherent risk of fall accidents. While periodic rope replacement is crucial for preventing accidents resulting from rope breakage, current regulations lack specificity in determining appropriate disposal period for fiber ropes. This study analyzed the tensile strength of the most commonly used PP fiber ropes with different diameters (16 mm, 20 mm) in the domestic construction industry. Additionally, the effect of outdoor exposure was examined by measuring the tensile strength of new ropes and ropes exposing to outdoor conditions for 30 days and 90 days. The results showed that the new ropes and those exposed to outdoor for 30 days met the KS (Korean Standards) criteria for tensile strength. However, a significant decrease in tensile strength was observed in ropes exposed to outdoor for 90 days compared to both the new ropes and those exposed for 30 days. Furthermore, the ropes exposed for 90 days did not meet the KS criteria. These findings indicate the degradation of PP fiber ropes due to UV (Ultra Violet) radiation, highlighting the importance of considering this factor when determining the replacement period for fiber ropes used in scaffolding work.

The desulfurizers facility is cylindrical shape. To operate properly it needs nozzles cleaned, get rid of lime adhesion and sludge, repair the wear and corrosion of facility regularly. For this purpose, workers shall access the ceiling or vertical wall at high place. Ordinary scaffoldings such as steel pipe scaffolding or system scaffolding have been using so that workers can access them. With these ordinary scaffoldings, openings around cylindrical wall are inevitable which make workers can expose always to the risk of falling. The purpose of this study is to develop customized scaffolding to minimize the openings to prevent workers form falling during maintenance it. It consists of a hexagonal central tower and six trapezoidal outer towers. And the bracing among the towers have connected each other for self-standing and for maintaining the structure of towers. Span decks, the circumference footstools, steps, etc. are laid on each floor. The safety is reviewed by structural analysis and performance test. With this study, openings each floor of this scaffold are removed. The gap between the cylindrical wall and the edge of the work stage is approximately 100 mm. Therefore, we expect that workers can work safely and efficiently.

Vygotsky의 인지발달이론은 구성주의 철학을 뒷받침하고 있으므로 그 이론을 현장에 적용하는 것은 학생이 스스로 지식을 구성하는 교육의 실현에 한 발 가까워 질 수 있는 기초를 제공한다는 점에서 의미가 있을 것이다. 이에 본 연구는 Vygotsky의 비계 설정 이론을 고등학교 경제과 교수-학습 과정에 적용한 후, 비계설정의 효과 및 한계를 파악하고 이를 토대로 교수-학습 과정에서의 효과적 비계설정 방안을 제시하는 것을 목적으로 하였다. 이를 위해 경기도 농촌 소재 인문계 K고등학교 2학년 학생을 대상으로 동료 비계 전략을 활용한 수업을 진행한 후 형성평가와 총괄평가 결과, 효능감과 만족도 검사 결과를 분석하였다. 본 연구에서 도출된 교수-학습 과정에서 효과적 동료비계 적용을 통해 학습자의 인지적, 정의적 성장을 촉진하기 위한 방안은 학습자의 학습습관(개별학습 선호 또는 동료학습 선호 여부), 학업 성취도에 따른 비계 설정 방법 차별화를 통한 멘토의 효능감과 멘티의 만족감 극대화이다.

Due to increased demand for remodeling and repair in construction market in recent year, the usage of horse scaffold is increasing in the indoor finish works. Injuries related horse scaffold are mainly caused by poor installation or of careless handling of scaffold. Approximately 300 workers are injuried at construction site every year, it is accounting for about 1.5% of the total construction sector and has increased on a year-to-year trends. But the main contents between national standards and speccifications related to the manufacture and usage of horse scaffolds are mutually inconsistent, In particular, the rules on occupational safety and health standards are the basis for the prevention of industrial injuries, there is no explicit application being made to the horse scaffold commonly used on construction sites. The purpose of this study was to analye the manufacture and usage situations in order to reduce construction injuries that occur at the horse scaffolds. It will be utilized the results of the analysis as the basis data for unifying the major domestic standards and specifications associated with the manufacture and usage of horse scaffold.

Many fatal and non-fatal injuries occurred as a result of unexpected falls from horse scaffolds during structural or finishing works such as painting, plastering, or plumbing. Therefore, this study is to improve safety standards for horse scaffolds used mostly in the interior finishing works. But hazard elements for the horse scaffolds has not been specifically identified. This study has analyzed the accidents of horse scaffolds to prevent construction accidents and the characteristics of a serious accidents related the horse scaffolds. It was suggested a safety management plan and a group of accidents characteristics. The results of this study are expected to be utilized as basic data for prviding a reference related to the horse scaffolds and to be unified the regulations associated with the horse scaffolds.

During five years (Year 2009~2013), Total victims of 72 %( 81,560 people) and those 50.6 %( 1,258 people) of death accident occurs in small scale construction site which operate 2 million USD less construction budget. Especially, falling death accident account for 785 people, in the share of 33.2 %( 261 people) death disaster takes due to defect of original cause materials. The major safety issues in small scale work place take place while scaffold installation, disassembling, work-plate improper installation or non-professional skills of workers. Furthermore, labor subcontract systems make small construction site shortage of resources. Those workers regard work-plate as unnecessary and consumables supplies. Because of that most of workers use unsafe workplace in most construction site. Therefore, in order to prevent falling accident occurring in small scale work site, government should organize related regulations such as “Work site safety construction method” and then expands education support, financial aid, and sourcing safety supplies for work plate which offer broad variety experiences. Also, introduce certificate solutions for various work plates to improve safety function such as anchoring type method and anti sliding function.

According to the statistics of occupational accidents in 2009, the scaffolds and work platforms were main objects causing fall accidents in construction sites. But many workers install and use the work platforms on the mobile scaffolding without considering about safety standards. We had conducted a nationwide survey about how workers obey safety standards for the work platforms of the mobile scaffolding. As the result of a survey, no one follow a gap standard between materials of work platforms and installation of toe board. And it is a low proportion that comply with the install of safety guard rails and the use of stoppers. This is lack of consciousness for the safety certification and regulations. For safe use a mobile scaffolding, It is needed to educate a manager on the safety standards and to develop a product to install and dismantle easily.

The law(construction standard specification, construction, standard-work regulation, Industry safety standard related regulation) related to the installation of scaffolding being used commonly on the construction site is regulated that the gap of ledger is within 1.5m and first ledger is within 2m. The gap of ledger here is essential for the stability of scaffolding structure. But it is determined that it is possible for the gap of ledger is applied by explaining safety handrail as ledger, because of the fact that in current, on the construction site, safety handrail is installed with the material of scaffolding ledger as a steel tube pipe. On this study, it is aimed to guarantee the safety by analyzing the ledger of scaffolding practically and prevent the accident of manager and laborer through the actualization.

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.