In this study, the purpose of this study was to examine the effect of twisting in the preparation of waterproofing in the process of unfolded donut-type staking method fire hoses in indoor hydrant system. The central pull-out method caused more twisting than the rolling method, and there was no significant difference in the number of twists according to the pull-out method in the case of male and female students. It was found that the time it took to untwist and prepare waterproofing was much shorter for male students. The angle valve and hose are connected, and the time to untwist and prepare for waterproofing after withdrawing the fire hose with the hose and nozzle connected was shorter than the unconnected state. In the rolling method, when a hose connected with two 15 m fire hoses was used and the angle valve-hose was connected, but the hose-nozzle was not connected, the least kinking occurred. The time to untwist and prepare for waterproofing was also the shortest. As a result, in the withdrawal method of the donut-type loaded fire hose in the indoor hydrant system, it is a rolling method rather than a central withdrawal method. With the angle valve and hose connected, unfold the fire hose with the hose and nozzle connected, if a large number of people unwind the twisted hose, the time to prepare for waterproofing can be shortened.

Abstract
1. 서 론
2. 옥내소화전설비의 주요구성
    2.1 옥내소화전함
    2.2 소방호스
    2.3 소방관창
    2.4 방수구
    2.5 기타 부속품
3. 소방호스 방수준비시간 비교를 위한실험구성
    3.1 실험대상
    3.2 실험 환경 및 실험 시나리오
4. 실험결과 및 고찰
    4.1 중심인출 방식에 따른 꼬임횟수와방수준비시간 측정 결과
    4.2 굴림 방식에 따른 꼬임횟수와 방수준비시간 측정 결과
5. 결 론
6. References

• 홍석환((주)덕원기술단) | Suk-Hwan Hong (Deokwon Technical Team Co., Ltd.)
• 공하성(우석대학교 소방방재학과) | Ha-Sung Kong (Fire and Disaster Prevention, Woosuk University) Corresponding Author