PURPOSES : This study aimed to secure the work space in alarm valve rooms to ensure stable working conditions for the engineers. METHODS : We analyzed situations where alarm valve room work spaces were inadequately secured posing a problem. Using the Ovako working posture analysis system (OWAS) method, we measured the body size of adult male technicians and their tools to analyze the actual space needed for them to maintain a healthy posture while working. On this basis, we proposed regulations governing workspace size and acceptable durations for unstable body postures. RESULTS : By measuring valve room work space and technician body size, we found that the workspace was inadequate for technicians. Applying OWAS showed that securing more space in the valve room improved the construction stability. CONCLUSIONS : Regulations on valve room size and appropriate work space for technicians will improve construction and inspection stability. This reduces the probability of poor construction and inadequate inspection, increasing the reliability of the firefighting facility system.

스프링클러설비에서 누수 하자가 발생되면 설비의 작동을 멈추는 경향이 많고 이는 입주자의 안전에 많은 지장을 초래하게 되며, 누수피해로 재산상의 손실도 발생하게 되므로 스프링클러설비는 화재진압 성능뿐만 아니라 내구성도 높아야 할 것이다. 동관 부식은 스프링클러설비 배관에서 주로 나타나는 특이한 현상으로서 그 동안 제시된 여러 학설들과 법원의 판단 등을 종합하여 검토한 결과, 동관의 부식은 매우 복합적인 요인에 의해 발생되고 있고, 하자보수 방법의 결정요인의 핵심은 보완시공을 통한 부식억제의 가능성 여부를 판단하는 것인데 실증적용 사례 연구 등을 통한 결론을 도출 하였다. 또한 스프링클러설비의 설비의 내구성 강화에 대한 법규적 미비점에 대해서도 연구를 통한 개선방안을 제시하여 향후 하자발생을 줄이고자 하였다.

A fire sprinkler system is very important to extinguish fire in the building. The sprinkler system initiates sprinkler discharge if the detection system identifies a developing fire and opens the pre-action valve. However, pre-action fire sprinkler systems mainly installed in the underground parking lot at the apartment complex do not properly operate at fire if the connection type of fire sprinkler systems does not properly installed and operated. This study identified the relationship between fire dispersion & damage and the connection type of water supply in the sprinkler system from many fire cases at the apartment complex in South Korea. In addition, this study also identified the water supply differences and characteristics between South Korea and foreign countries. The main purpose of this study is also to improve the water connection types in the sprinkler system that can reduce the potential failures of pre-action valve operation through electrical signal system. The study also suggests the improvement plan for water connection types in pre-action fire sprinkler system that can minimize potential failure of pre-action fire sprinkler system. The suggestions for revising the fire safe standard in South Korea includes letting the water supply pipe of sprinkler system water inlet connect to the second side of pre-action valve and the water flow device that can minimize potential failure of sprinkler system.

The numerical calculation was carried out using OmniCADDⓇ HCS Hydraulic Calculation Software to certify if flow velocities in pipes reduced in diameter were satisfied with fire codes for a dry system of underground parking area in apartment complex. The design pressure and flow rate for the dry system were 4.3 bar and 1633.8 lpm. The maximum discharge pressure and flow rate of sprinklers were 2.2 bar and 118.2 lpm. The maximum flow velocities in main pipe, branch line and other pipe of the dry system were 1.5 m/s, 5.0 m/s and 3.5 m/s. The design propriety could be clearly certified by satisfying with fire codes related to flow velocities for the pipe network of the dry system.