• Title/Summary/Keyword: NFSC 501A

Search Result 13, Processing Time 0.024 seconds

A Comparative Study on Domestic and Foreign Standards for Air Supply for the Improvement of a Smoke Control System for High-Rise Buildings (국내 고층건축물의 제연설비 성능 개선을 위한 국내·외 급기량 관련 기준 비교연구)

  • Kim, Hye-Won;Lee, Byeong-Heun;Jin, Seung-Hyeon;Lee, Su-Gak;Kim, Jung-Yup;Kwon, Young-Jin
    • Fire Science and Engineering
    • /
    • v.33 no.4
    • /
    • pp.105-111
    • /
    • 2019
  • In South Korea, smoke control systems are designed according to the fire safety standards NFSC501 and NFSC 501A. However, there is a problem in that the design values are incompatible when measuring the performance of the system after the design construction for calculating the leakage crack area described in the standards. Therefore, we compared the standards for smoke control systems from South Korea, Japan, and the United Kingdom. In South Korea, designs are conducted uniformly according to the NFSC 501A Manual, but in Japan and the United Kingdom, designs consider smoke temperature, duct loss, and fire floor air supply. Furthermore, they use larger values than in South Korea.

Numerical Analysis on Pressurization System of Smoke Control in Consideration of Flow Rate of Supply and Leakage (보충량과 누설량을 고려한 급기가압 제연시스템의 수치해석 연구)

  • Kim, Jung-Yup;Shin, Hyun-Joon
    • Fire Science and Engineering
    • /
    • v.24 no.5
    • /
    • pp.87-93
    • /
    • 2010
  • The fact that the smoke hinders evacuation and fire-fighting activities as well as becomes the major cause of life casualty emphasizes the importance of smoke control system. As one of the fire safety standards designed to secure the smoke safety, NFSC501A (Design Guide for Smoke Control System of Special Evacuation Stairwell and Lobby) has been proposed, preventing smoke from penetrating into the smoke-free escape route by raising the pressure of the smoke control zone higher than fire area. For model building of 20 stories, pressurization system was designed according to standard and pressure field of compartments in whole building induced by pressurization system was analyzed using the network model.

Study on the Assessment of the Criteria on a Door Closer for the Optimum Design of the Access Door of a Smoke Control Zone (제연구역 출입문의 최적 설계를 위한 도어클로저의 기준 산정에 관한 연구)

  • Lee, Jae-Ou;Choi, Chung-Seog
    • Fire Science and Engineering
    • /
    • v.27 no.3
    • /
    • pp.66-71
    • /
    • 2013
  • The purpose of this study is to assess the criteria on a floor hinge and door closer for the optimum design of the access door of a smoke control room. The door opening force due to differential pressure is 60.75 N, 40.5 N, 32.91 N and 12.66 N when the differential pressure is 60 Pa, 40 Pa, 32.5 Pa and 12.5 Pa, respectively. The door opening force of the floor hinge and door closer to which the criteria of KS F 2806 are applied is 27.5 N, 40 N, 75 N, 100 N and 125 N for the Nos. 1, 2, 3, 4 and 5 class floor hinges and door closers, respectively. This study compared the differential pressure and opening force limits of floor hinges and door closers with the values specified in NFSC 501A and found that they exceeded the criteria specified in NFSC 501A. Therefore, it is necessary to reflect the differential pressure and smoke control wind speeds as well as the opening forces specified in NFSC 501A on the design of floor hinges and door closers. The installation conditions of floor hinges and door closers of access doors differ depending on the type and name of a smoke control damper. This study found that Nos. 1, 2 and 3 floor hinges and door closers could be installed for access doors with low differential pressure and that Nos. 1 and 2 floor hinges and door closers could be installed for access doors with normal differential pressure.

Design for Pressurizing System about Vestibule by Stack Effect & Engineering Analysis - Focused on Case Study - (굴뚝효과와 공학적분석에 의한 부속실 가압시스템 설계 - 사례를 중심으로 -)

  • Kim, Yong-Kwang
    • Fire Science and Engineering
    • /
    • v.23 no.4
    • /
    • pp.145-153
    • /
    • 2009
  • We are generally applicate smoke control only vestibule about special escape staircase, it is one of some smoke control model of NFSC 501A. But there are some point at issue in this system. The smoke control system on supervision field of writer is smoke control only vestibule same as the other resemble field. Writer studied in the concrete to find a solution at this issue, and derived a conclusion the most reasonable system on the field is "same time smoke control for staircase and vestibule" by the engineering analysis considering stack effect.

A Study on the Opening Force Standard of Entrance Doors For the Optimized Design of Smoke Control Systems (제연설비의 최적 설계를 위한 출입문 개방력 기준에 관한 연구)

  • Lee, Jae-Ou;Choi, Chung-Seog
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
    • /
    • 2013.11a
    • /
    • pp.65-66
    • /
    • 2013
  • 제연구역에 설치된 방화문의 개폐 기준은 현실과 괴리가 있고 상당 부분 문제점을 가지고 있다. 우리나라 성인 남녀가 일어서 있는 조건에서 오른손으로 미는 힘을 측정한 결과 국가화재안전기준(NFSC 501A)에서 제시하고 있는 개방력과 차이가 큰 것을 확인할 수 있었다. 20대는 평균 103.31N이었고, 30대는 105.27N, 40대는 100.92N, 50대는 97N, 60대는 91.75N 등으로 측정 되었다. 따라서 NFSC 501A에서 제시하고 있는 기준값의 하향 조정이 필요한 것으로 판단된다.

  • PDF

Verifying the Suitability or Unsuitability of the Opening Force Criteria Applied to Air Pressurized Access Door to a Smoke Control Zone (급기 가압 제연구역 출입문에 적용되는 개방력 기준의 적합성 여부에 관한 연구)

  • Lee, Jae-Ou;Choi, Chung-Seog
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.15 no.9
    • /
    • pp.5820-5825
    • /
    • 2014
  • The aim of this study was to verify the suitability or unsuitability of Korean body types by measuring the opening force criteria of an air pressurized access door to a smoke control zone. The opening force criteria were verified by comparing the NFSC 501A, NFPA 92A and BS-EN 12101-6 based on the body standards information from the Korean Agency for Technology and Standards. When measuring the opening forces, the posture of the body should be standing upright and pushing an access door with the right hand, which is a criterion for designing doors. As a result of analyzing the actual measurement results, the pushing force of men and women in their 30's was the maximum value and the forces in those in their 60's was the minimum value. In addition, the deviations in the pushing forces varied considerably. As a result of comparing the NFSC 501A, the men showed lower values than the criteria in every gender and age variable except for the 20's, 30's and 50's variable. A comparison of the criteria of NFPA 92A showed that the mean of the measured values from every gender and age was also lower than the criteria. In addition, when comparing the criteria of BS-EN 12101-6, it was found that the men in every age variable were higher than the criteria. On the other hand, the women in every age variable were lower than the criteria. Therefore, considering the Korean body type against the Western body type, it was decided that the opening force of an access door to a smoke control area to make a downward adjustment should be 110 N in the local criteria. Furthermore, the criteria should consider the characteristics of buildings and users because an optional application of the international standard is not necessarily suitable for local situations.

A Study On Effectiveness of Prevent Smoke Backflow in Apartment (계단식 공동주택 방연풍속 실효성에 대한 연구)

  • Lee, Kwang­Soo;Yoon, Myong­O;Lee, Jun
    • Journal of the Society of Disaster Information
    • /
    • v.17 no.1
    • /
    • pp.1-9
    • /
    • 2021
  • Purpose: The purpose of this study is to analyze the differential pressure and velocity to prevent smoke backflow of Stairways Apartment House fire, and verified the effectiveness of smoke velocity standards proposed by NFSC 501A. Method: The smoke control design of the stairways apartment house of the real model and the performance of the velocity to prevent smoke backflow according to the window opening conditions of the living room were analyzed using the CONTAM program. Result: Although the differential pressure performance of the apartment's smoke control system was satisfactory, it was found that Performance of velocity to prevent smoke backflow did not come out according to the opening condition of the living room window. Conclusion: In the case of Stairways Apartment House, it is necessary to review the method of making exceptions to the 'velocity to prevent smoke backflow' standard required by the National Fire Safety Codes(NFSC 501A)

A Comparative Analysis of Domestic and Foreign Standards to Improve the Performance of Zone Smoke Control System (거실 제연설비 성능 개선을 위한 국내·외 기준 비교 분석에 관한 연구)

  • Huh, Ye-Rim;Kim, Yoon-Seong;Kim, Hye-won;Jin, Seung-Hyeon;Kwon, Young-Jin
    • Proceedings of the Korean Institute of Building Construction Conference
    • /
    • 2022.04a
    • /
    • pp.83-84
    • /
    • 2022
  • In Korea, smoke control measures through NFSC 501 are proposed to reduce human casualties caused by smoke in the event of a fire. However, as a result of investigating and analyzing domestic and foreign standards, it was found that domestic regulations do not set fire source, but simply set smoke emissions by floor area or height of smoke boundary. Foreign regulations set fire source. Therefore, it is judged that it is necessary to review whether the current domestic regulations can be applied in the event of an actual building fire. So, this paper aims to identify the differences in domestic and foreign standards through investigation and analysis of related standards for fire zone smoke control system in each country and use them as basic data to improve the performance of zone smoke control system.

  • PDF

Study on Measurement Method of Air Egress Velocity in Vestibule of Smoke Control System (특별피난계단 부속실 제연설비의 방연풍속 측정 방법에 관한 연구)

  • Lee, Su-Kyung;Hong, Dae-Hwa
    • Fire Science and Engineering
    • /
    • v.25 no.3
    • /
    • pp.85-90
    • /
    • 2011
  • This study of the vestibule of pressurizing smoke control system installed in domestic high-rise buildings for evacuation in case of fire, when the door is open to forming characteristics of the air flow was analyzed using fire dynamics simulator and analyzed of variance. Vestibule which is compartment of the design condition, air flow in the exhaust damper was formed severe turbulence confirming preceding research. The door position is in the range of formed vortex, unsteady flow of air occurs at the point that the door could be confirmed. According to the NFSC 501A, door to symmetrically separate the average of 10 points or more as measured from the average of wind speed to do is based. Under these conditions, it is difficult to measure the characteristics of the upper air flow of upper points. so measuring points are subdivided by more than 64 points method presented in TAB because severe deviation of wind speed.

Study on the Analysis of Differential Pressure of the Access Door for a Smoke Control Zone and the Effectiveness of the Measurement Criteria of its Opening Force (제연구역 출입문의 차압 및 개방력 측정기준의 실효성 분석에 관한 연구)

  • Lee, Jae-Ou;Choi, Chung-Seog
    • Fire Science and Engineering
    • /
    • v.26 no.4
    • /
    • pp.24-30
    • /
    • 2012
  • The purpose of this study is to analyze the problem in measuring the differential pressure between the fire area and the neighboring smoke control zone as well as the opening force of a fire door and to present the actual values measured by an objective method. NFSC 501A specifies that the force necessary to open an access door when operating a smoke control system shall be less than 110 N. When the smoke control system does not operate in the space where it is installed, the door opening force can be measured by the test method in KS F 2805. However, when the smoke control system operates, additional opening force is required to overcome the force generated by the differential pressure between the fire area and smoke control room. Therefore, it can be seen that the method proposed by the standard has insufficient reliability. The analog measuring device and digital measuring device showed that the opening forces, $F_a$ and $F_d$, of the fully closed door before the smoke control system were 27.8 N and 27.4 N, respectively. When the door remained open by $5^{\circ}$, the opening forces, $F_a$ and $F_d$, were 33 N and 33.6 N, respectively. When the smoke control system operated and the door was fully closed, the door opening forces, $F_a$ and $F_d$, were 77.6 N and 76.0 N, respectively. Therefore, since the door opening forces are different from the criteria presented by KS F 2805, it is required to review the criteria appropriately.