NFPA 221-2015 Standard for High Challenge Fire Walls Fire Walls and Fire Barrier Walls (Effective Date 5 19 2014).pdf

1、NFPA221 Standard for High Challenge Fire Walls, Fire Walls, and Fire Barrier Walls 2015 Edition NFPA, 1 Batterymarch Park, Quincy, MA 02169-7471 An International Codes and Standards Organization 1/14ISBN: 978-145590904-9 (Print)ISBN: 978-145590944-5 (PDF)IMPORTANT NOTICES AND DISCLAIMERS CONCERNING

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29、s and standards can be viewed at no cost at www.nfpa.org/freeaccess.Copyright 2014 National Fire Protection Association. All Rights Reserved.NFPA221Standard forHigh Challenge Fire Walls, Fire Walls, and Fire Barrier Walls2015 EditionThis edition of NFPA 221, Standard for High Challenge Fire Walls, F

30、ire Walls, and Fire BarrierWalls, was prepared by the Technical Committee on Building Construction. It was issued bythe Standards Council on April 29, 2014, with an effective date of May 19, 2014, and super-sedes all previous editions.This edition of NFPA 221 was approved as an American National Sta

31、ndard on May 19,2014.Origin and Development of NFPA 221The Technical Committee on Building Construction undertook a project to develop a newdocument to govern fire walls in 1991. At the time, no standard existed to assist code authori-ties, architects, or engineers on the criteria that were necessar

32、y to properly design and con-struct a fire wall. The first edition of NFPA 221 was issued in 1994. It contained information onvarious types of fire walls including basic design criteria, proper protection of penetrations,and special design practices for exterior protection features.The 1997 edition

33、of NFPA 221 contained several changes, including the addition of spe-cific criteria for treatment of seismic separation assemblies, additional criteria for properprotection of raceway penetrations, and the addition of several suggested protection schemesfor properly protecting an egress door located

34、 in a fire wall.The 2000 edition addressed specific testing criteria for performance of rated assembliesthat included expansion, seismic, and control joints in fire wall and fire barrier wall assem-blies. In addition, a second test protocol was recognized for tests of through penetrations.The 2006 e

35、dition introduced two distinct types of fire walls. Presented in Chapter 5, the“high challenge fire wall” requirements are an evolution of the fire wall requirements foundin the 2000 edition of NFPA 221, while the “fire wall” requirements presented in Chapter 6 arebased upon the requirements found i

36、n the 2003 edition of NFPA 5000, Building Constructionand Safety Code. Chapter 4 of this document contains extracts from NFPA5000, Chapter 8, onsuch topics as analytical methods, duct and air-transfer openings, joints, opening protectives,and penetrations. Please note these extracts were stylistical

37、ly adjusted to reflect this docu-ments exclusive focus on walls by eliminating references to floors, floor-ceiling assemblies,smoke dampers, and partitions.The 2009 edition was updated to reflect changes to Chapter 8 of NFPA 5000. Otherchanges included recognition of the new criteria used to determi

38、ne building height andgrade geometries, further clarifications as to where a provision applies to a particular type ofwall, and the addition of a new requirement concerning horizontal exits served by bridgesbetween buildings.The 2012 edition was a reaffirmation of the previous edition, with updated

39、references toreflect changes in UL and ASTM documents.ASCE definitions are reprinted with permission from ASCE.For the 2015 edition, extracts from NFPA5000 have been removed. NFPA5000 now extractsmaterial from NFPA 221. Definitions and referenced documents have also been updated.2211NFPA and Nationa

40、l Fire Protection Association are registered trademarks of the National Fire Protection Association, Quincy, Massachusetts 02169.Technical Committee on Building ConstructionJoseph H. Versteeg, ChairVersteeg Associates, CT ERep. International Fire Marshals AssociationFarid Alfawakhiri, American Iron

41、and Steel Institute,IL MRaymond J. Battalora, Aon Fire Protection Engineering,TX IJesse J. Beitel, Hughes Associates, Inc., MD SEDavid S. Collins, The Preview Group, Inc., OH SERep. American Institute of ArchitectsRichard J. Davis, FM Global, MA IAlan J. Dopart, Willis of New Jersey, NJ IVictor L. D

42、ubrowski, Code Consultants, Inc., MO SEPaul Ferro, Fire Department City of New York, NY LRep. International Association of Fire FightersDavid W. Frable, U.S. General Services Administration,IL USam W. Francis, American Wood Council, PA MJoseph T. Holland, Hoover Treated Wood Products,FL MJeffrey M.

43、Hugo, National Fire Sprinkler Association,Inc., MI MRobert L. Lemon, Jr., Americana Construction Group,Inc., MD SEDale Litton, Texas Instruments, Inc., TX URep. Semiconductor Industry AssociationVickie J. Lovell, InterCode Incorporated, FL MRep. Fire whereas, for the process-ing of NFPA 220 and NFPA

44、 221, this committee does not report to the NFPA 5000 TCC.2212 HIGH CHALLENGE FIRE WALLS, FIRE WALLS, AND FIRE BARRIER WALLS2015 EditionContentsChapter 1 Administration . 22141.1 Scope . 22141.2 Purpose 22141.3 Application . 22141.4 Retroactivity 22141.5 Equivalency . 22141.6 Units 2214Chapter 2 Ref

45、erenced Publications . 22142.1 General 22142.2 NFPA Publications . 22142.3 Other Publications. (Reserved) 22142.4 References for Extracts in MandatorySections. (Reserved) 2215Chapter 3 Definitions 22153.1 General 22153.2 NFPA Official Definitions 22153.3 General Definitions . 2215Chapter 4 General R

46、equirements . 22164.1 Scope . 22164.2 Design Loads . 22164.3 Fire Resistance Ratings . 22164.4 Ducts and Air-Transfer Openings 22164.5 Double Wall Assemblies 22174.6 Impact Damage 22174.7 Joints . 22174.8 Opening Protectives 22184.9 Penetrations 22194.10 Grade Plane 22110Chapter 5 High Challenge Fir

47、e Walls . 221105.1 Scope . 221105.2 Structural Stability 221105.3 Cantilevered HC Fire Walls . 221105.4 Tied HC Fire Walls 221105.5 Double HC Fire Walls 221105.6 HC Fire Walls at Elevation Differences . 221105.7 Clearance . 221115.8 Opening Protectives 221115.9 Penetrations in HC Fire Walls 221115.1

48、0 Ducts and Air Transfer Openings 221115.11 High-Hazard Materials . 221115.12 Parapets 221115.13 Roof Surface Protection . 221115.14 Roof Structures 221125.15 Roof Penetrations . 221125.16 Horizontal Continuity 22112Chapter 6 Fire Walls 221146.1 Scope . 221146.2 Structural Stability 221146.3 Cantile

49、vered Fire Walls . 221146.4 Tied Fire Walls . 221146.5 Double Fire Walls 221146.6 Fire Wall Termination 221146.7 Fire Walls with Elevation Differences . 221156.8 Clearance . 221156.9 Horizontal Continuity 221156.10 Opening Protectives 22116Chapter 7 Fire Barrier Walls 221167.1 Scope . 221167.2 Continuity . 221167.3 Opening Protectives 22116Annex A Explanatory Material . 22116Annex B Informational References . 22124Index . 221252213CONTENTS2015 EditionNFPA 221Standard forHigh Challen