NIST NCSTAR1-1G

Federal Building and Fire Safety Investigation of the

World Trade Center Disaster

Amendments to the Fire Protection

and Life Safety Provisions of the New

York City Building Code by Local

Laws Adopted While World Trade

Center 1, 2, and 7 Were in Use

Joseph C. Razza

Raymond A. Grill

National Institute of Standards and Technology Technology Administration • U.S. Deportment of Commerce

NIST NCSTAR 1-1G

Federal Building and Fire Safety Investigation of the

World Trade Center Disaster

Amendments to the Fire Protection

and Life Safety Provisions of the New

York City Building Code by Local

Laws Adopted While World Trade

Center 1, 2, and 7 Were in Use

Joseph C. Razza

Raymond A. Grill Rolf Jensen & Associates, Inc.

September 2005

U.S. Department of Commerce

Carlos M. Gutierrez, Secretary

Technology Administration Michelle O'Neill, Acting Under Secretary for Technology

National Institute of Standards and Technology

William Jeffrey, Director
Disclaimer No. 1

Certain commercial entities, equipment, products, or materials are identified in this document in order to describe a procedure or concept adequately or to trace the history of the procedures and practices used. Such identification is not intended to imply recommendation, endorsement, or implication that the entities, products, materials, or equipment are necessarily the best available for the purpose. Nor does such identification imply a finding of fault or negligence by the National Institute of Standards and Technology.

Disclaimer No. 2 The policy of NIST is to use the International System of Units (metric units) in all publications. In this document,

however, units are presented in metric units or the inch-pound system, whichever is prevalent in the discipline.

Disclaimer No. 3

Pursuant to section 7 of the National Construction Safety Team Act, the NIST Director has determined that certain evidence received by NIST in the course of this Investigation is "voluntarily provided safety-related information" that is "not directly related to the building failure being investigated" and that "disclosure of that information would inhibit the

voluntary provision of that type of information" (15 USC 7306c).

In addition, a substantial portion of the evidence collected by NIST in the course of the Investigation has been

provided to NIST under nondisclosure agreements.

Disclaimer No. 4 NIST takes no position as to whether the design or construction of a WTC building was compliant with any code

since, due to the destruction of the WTC buildings, NIST could not verify the actual (or as-built) construction, the

properties and condition of the materials used, or changes to the original construction made over the life of the

buildings. In addition, NIST could not verify the interpretations of codes used by applicable authorities in determining

compliance when implementing building codes. Where an Investigation report states whether a system was

designed or installed as required by a code provision, NIST has documentary or anecdotal evidence indicating

whether the requirement was met, or NIST has independently conducted tests or analyses indicating whether the requirement was met.

Use in Legal Proceedings

No part of any report resulting from a NIST investigation into a structural failure or from an investigation under the

National Construction Safety Team Act may be used in any suit or action for damages arising out of any matter mentioned in such report (15 USC 281a; as amended by P.L. 107-231).

National Institute of Standards and Technology National Construction Safety Team Act Report 1-1G

Natl. Inst. Stand. Technol. Natl. Constr. Sfty. Tm. Act Rpt. 1-1G, 64 pages (September 2005)

CODEN: NSPUE2

U.S. GOVERNMENT PRINTING OFFICE

WASHINGTON: 2005

For sale by the Superintendent of Documents, U.S. Government Printing Office

Internet: bookstore.gpo.gov — Phone: (202) 512-1800 — Fax: (202) 512-2250

Mail: Stop SSOP, Washington, DC 20402-0001
Abstract

This report was prepared to support the analysis of building and fire codes and practices of the National

Institute of Standards and Technology (NIST) World Trade Center (WTC) Investigation. This report

supports the objective of documenting the requirements that governed the design and construction of

WTC 1,2, and?.

The purpose of this report is to provide an evolution of the life safety provisions of the Building Code of

the City of New York (BCNYC) since the design of WTC 1 and WTC 2, including retroactive provisions

for existing high-rise office towers. It has been previously established that WTC 1 and WTC 2 were

designed and constructed in accordance with the BCNYC as enacted by Local Law No. 76 for the year

1968, effective December 6, 1968.

The evolution of the BCNYC begins with a brief history of the Building Code prior to 1968 and reviews

the various local laws that have amended fire protection and life safety provisions of the Code from 1968

until the collapse of the WTC towers on September 11, 2001.

Keywords: Administrative code, building code, compartmentation, elevators, emergency power, fire

alarni, fire protection, fire safety, fire sprinklers, high-rise buildings, inspections, interior finish, life safety, means of egress, pressurization, venting, voice communication. World Trade Center.

NISTNCSTAR 1-1G, WTC Investigation iii
Abstract

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iv NISTNCSTAR 1-1 G, WTC Investigation
Table of Contents

Abstract iii

List of Figures ix

List of Tables xi

List of Acronyms and Abbreviations xiii

Glossary xv

Preface xvii

Executive Summary xxvii

Chapter 1 Introduction 1

Chapter 2 General 3

2. 1 Local Laws Containing Fire Protection/Life Safety Provisions 3

2.2 Effective Dates of Local Laws Amending the Building Code 4

Chapter 3 History of the New York City Building Code 7

3.1 1938 Building Code (Old Code) 7

3.2 1968 Building Code (Then Current Code) 7

Chapter 4

Evolution of Building Code since 1968 9

4.1 1970 - Local Law No. 54, Powers and Duties of the Department of Buildings 9

4.2 1973 - Local Law No. 5, Fire Safety Requirements in Certain Office Buildings 10

4.2. 1 Fire Safety in Office Buildings 1

4.2.2 Compartmentation 10

4.2.3 Smoke and Heat Venting 1

4.2.4 Means of Egress 11

4.2.5 Sprinklers 1

4.2.6 Interior Fire Alarm Signal and Voice Communication Systems 12

4.2.7 Elevators 12

4.2.8 Reference Standards 12

4.3 1 975 - Local Law No. 26, Fire Safety in Office Buildings 13

NIST NCSTAR 1-1 G, WTC Investigation v
Table of Contents

4.4 1976 - Local Law No. 55, Inspection of Sprayed-On Fire Protection of Structural Members 13

. 4.5 1 978 - Local Law No. 33, Fire Wardens in Office Buildings 14

4.6 1978 - Local Law No. 41, Fire Protection for Places of Assembly 14

4.7 1979 - Local Law No. 84, Fire Safety Pressurization in Office Buildings 15

4.8 1979 - Local Law No. 86, Revised Compliance Dates for Local Law No. 5/1973 16

4.9 1984 - Local Law No. 16, Fire Safety Requirements in Certain Buildings 17

4.9.1 Fire Safety Requirements 17

4.9.2 Alterations to Existing Buildings 18

4.9.3 Fire Protection Plan 18

4.9.4 Special Filing Requirements 18

4.9.5 Definitions 19

4.9.6 Height and Area Limitations 19

4.9.7 Compartmentation 19

4.9.8 Floor Coverings 19

4.9.9 Smoke Protection for Elevators and Escalators 20

4.9.10 Means of Egress 20

4.9.1 1 Emergency Power System 21

4.9.12 Atriums 21

4.9.13 Malls 21

4.9.14 Smoke Control Requirements 21

4.9.15 Automatic Sprinklers 22

4.9.16 Fire Alarm and Communication Systems 22

4.9.17 Elevators 22

4.9.18 Reference Standards 23

4.10 1985 - Laws of New York State, Renumbering of New York City Administrative Code 24

4.1 1 1987 - Local Law No. 16, Fire Alann Systems and Reference Standards 25

Chapter 5 Building Code Reference Standards ,...29

5.1 RS5-2, ASTME 119 29

5.2 RS 5-5, ASTM E 84 29

5.3 RS5-8, NFPA80 29

5.4 RS 13-1,NFPA90A 30

5.5 RS 17-1, Standpipe Construction 30

5.6 RS 17-2, NFPA 13 30

vi NISTNCSTAR 1-1 G, WTC Investigation
Table of Contents

5.7 RS 17-3, Fire Alann and Extinguishing Systems 3

5.8 RS 1 7-3 A, Class E Fire Alarai Systems 3

5.9 RS 1 7-3B, Modified Class E Fire Alarm Systems 3

5.10 RS 17-5, NFPA 72 32

5.11 RS 18-1, American National Standards Institute A17.1 32

Chapter 6 References 33

NIST NCSTAR 1-1 G, WTC Investigation vii
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viii NIST NCSTAR 1-1 G, WTC Investigation
List of Figures

Figure P-1. The eight projects in the federal building and fire safety investigation of the WTC

disaster xix

NISTNCSTAR 1-1 G, WTC Investigation ix
List of Figures

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X NISTNCSTAR 1-1G, WTC Investigation
List of Tables

Table P-1. Federal building and fire safety investigation of the WTC disaster xviii

Table P-2. Public meetings and briefings of the WTC Investigation xxi

Table 2-1. Effective dates of Local Laws 4

NISTNCSTAR 1-1 G. WTC Investigation xi
List of Tables

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xii NISTNCSTAR 1-1 G. WTC Investigation
List of Acronyms and Abbreviations

Acronyms

Abl M ASTM International

D C A New York City Board of Standards and Appeals

rJCJN IBuilding Code of the City of New York (Local Law No. 76)

T T LL Local Law to amend the Administrative Code of the City of New York

NFPA National Fire Protection Association

NIST National Institute of Standards and Technology

RS Reference Standard to the Building Code of the City of New York

WTC World Trade Center

WTC 1 World Trade Center 1 (North Tower)

WTC 2 World Trade Center 2 (South Tower)

WTC 7 World Trade Center 7

Abbreviations

op degrees Fahrenheit

cfm cubic foot per minute

ft foot

ft^ square foot

h hour

min minute

NISTNCSTAR 1-1 G, WTC Investigation XllI
List of Acronyms and Abbreviations

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XIV NISTNCSTAR 1-1 G, WTC Investigation
Glossary

active fire protection - A means to help prevent the loss of life and property from fire by extinguishing,

suppressing, or controlling a fire through functional systems. Sprinkler systems, fire alarm systems, and

smoke control systems are examples of active fire protection.

area of refuge - A floor area to which egress is made through a horizontal exit or supplemental vertical

exit.

combustible - A material that is not determined to be noncombustible.

damper - A device installed in heating, ventilating, and air conditioning ductwork used to prevent the spread of fire and/or smoke. Dampers are provided to maintain a fire resistance rating of the assembly

being penetrated.

detector - An initiation device that automatically detects a change in state, such as presence of smoke,

high temperature, or abnormal rate of temperature rise.

fire alarm system - A system, automatic or manual, arranged to give a signal indicating a fire emergency

and initiate the appropriate response.

fire resistance rating - The time in hours that materials or their assemblies will withstand fire exposure

as determined by a fire test.

fireproofing - Materials or assemblies used to provide a fire resistance rating to a building component.

firestop - A solid or compact, tight closure to retard the spread of flames or hot gases within concealed

spaces.

initiation device - A system component that originates a change-in-state signal in the fire alarm system.

An initiation device begins the life safety processes, such as evacuation; heating, ventilating, and air conditioning shut down; elevator recall; etc.

manual fire alarm box - A manually operated initiation device that originates a change-in-state signal in the fire alann system.

means of egress - A continuous and unobstructed path of vertical and horizontal travel from any point in a building to a public way. The means of egress consists of the exit access, the exit, and the exit discharge.

noncombustible - A material that, in the form in which it is used in construction, will not ignite and bum

when subjected to fire. However, any material which liberates flammable gas when heated to any

temperature up to 1,380 T for 5 min shall not be considered noncombustible.

NISTNCSTAR 1-1 G, WTC Investigation XV
Glossary

notification appliance - A fire alann system component such as a bell, horn, speaker, or strobe that provides audible, tactile, or visible outputs, or any combination thereof.

passive fire protection - Fire protection features that are incorporated into the building construction or building materials that do not rely on active fire protection methods to limit fire ignition, fire growth, or material failure. Fire separations and divisions, sprayed-on fire proofing, and enclosing structural members with noncombustible materials are examples of passive fire protection.

smoke and lieat venting - A process used to move products of combustion to the outdoor air.

xvi NISTNCSTAR 1-1G, WTC Investigation
Preface

Genesis of This Investigation

Immediately following the terrorist attack on the World Trade Center (WTC) on September 1 1

, 2001 , the Federal Emergency Management Agency (FEMA) and the American Society of Civil Engineers began

planning a building perfoiTnance study of the disaster. The week of October 7, as soon as the rescue and

search efforts ceased, the Building Perfonnance Study Team went to the site and began its assessment. This was to be a brief effort, as the study team consisted of experts who largely volunteered their time

away from their other professional commitments. The Building Perfonnance Study Team issued its report in May 2002, fulfilling its goal "to determine probable failure mechanisms and to identify areas of

future investigation that could lead to practical measures for improving the damage resistance of buildings

against such unforeseen events."

On August 21, 2002, with funding from the U.S. Congress through FEMA, the National Institute of

Standards and Technology (NIST) announced its building and fire safety investigation of the WTC

disaster. On October 1, 2002, the National Construction Safety Team Act (Public Law 107-231), was

signed into law. The NIST WTC Investigation was conducted under the authority of the National

Construction Safety Team Act.

The goals of the investigation of the WTC disaster were:

• To investigate the building construction, the materials used, and the technical conditions that contributed to the outcome of the WTC disaster.

• To serve as the basis for: - Improvements in the way buildings are designed, constructed, maintained, and used; - Improved tools and guidance for industry and safety officials; - Recommended revisions to cuiTent codes, standards, and practices; and - Improved public safety.

The specific objectives were:

1 . Determine why and how WTC 1 and WTC 2 collapsed following the initial impacts of the

aircraft and why and how WTC 7 collapsed;

2. Determine why the injuries and fatalities were so high or low depending on location,

including all technical aspects of fire protection, occupant behavior, evacuation, and

emergency response;

3. Determine what procedures and practices were used in the design, construction, operation,

and maintenance of WTC 1,2, and 7; and

4. Identify, as specifically as possible, areas in current building and fire codes, standards, and

practices that warrant revision.

NISTNCSTAR 1-1G, WTC Investigation xvu
Preface

NIST is a nonregulatory agency of the U.S. Department of Commerce's Technology Administration. The

purpose of NIST investigations is to improve the safety and structural integrity of buildings in the United

States, and the focus is on fact finding. NIST investigative teams are authorized to assess building

performance and emergency response and evacuation procedures in the wake of any building failure that has resuhed in substantial loss of life or that posed significant potential of substantial loss of life. NIST

does not have the statutory authority to make findings of fault nor negligence by individuals or

organizations. Further, no part of any report resulting from a NIST investigation into a building failure or from an investigation under the National Construction Safety Team Act may be used in any suit or action

for damages arising out of any matter mentioned in such report ( 15 USC 281a, as amended by Pubhc

Law 107-231).

Organization of the Investigation

The National Construction Safety Team for this Investigation, appointed by the then NIST Director, Dr. Arden L. Bement, Jr., was led by Dr. S. Shyam Sunder. Dr. William L. Grosshandler served as Associate Lead Investigator, Mr. Stephen A. Cauffman served as Program Manager for Administration,

and Mr. Harold E. Nelson served on the team as a private sector expert. The Investigation included eight

interdependent projects whose leaders comprised the remainder of the team. A detailed description of

each of these eight projects is available at http://wtc.nist.gov. The purpose of each project is summarized

in Table P-1, and the key interdependencies among the projects are illustrated in Fig. P-1.

Table P-1. Federal building and fire safety investigation of the WTC disaster.

Technical Area and Project Leader Project Purpose

Analysis of Building and Fire Codes and

Practices; Project Leaders: Dr. H. S. Lew

and Mr. Richard W. Bukowski

Document and analyze the code provisions, procedures, and

practices used in the design, construction, operation, and

maintenance of the structural, passive fire protection, and

emergency access and evacuation systems of WTC 1, 2, and 7. Baseline Structural Performance and

Aircraft Impact Damage Analysis; Project Leader: Dr. Fahim H. Sadek

Analyze the baseline performance of WTC 1 and WTC 2 under

design, service, and abnormal loads, and aircraft impact damage on

the structural, fire protection, and egress systems.

Mechanical and Metallurgical Analysis of

Structural Steel; Project Leader: Dr. Frank

W. Gayle

Detemiine and analyze the mechanical and metallurgical properties

and quality of steel, weldments, and connections from steel recovered from WTC L 2, and 7. Investigation of Active Fire Protection Systems; Project Leader: Dr. David

D. Evans; Dr. William Grosshandler

Investigate the performance of the active fire protection systems in WTC 1, 2, and 7 and their role in fire control, emergency response, and fate of occupants and responders.

Reconstruction of Thermal and Tenability

Environment; Project Leader: Dr. Richard

G. Gann

Reconstruct the time-evolving temperature, thermal environment,

and smoke movement in WTC 1 , 2, and 7 for use in evaluating the

structural performance of the buildings and behavior and fate of

occupants and responders.

Structural Fire Response and Collapse

Analysis; Project Leaders: Dr. John

L. Gross and Dr. Therese P. McAllister

Analyze the response of the WTC towers to fires with and without

aircraft damage, the response of WTC 7 in fires, the performance

of composite steel-trussed floor systems, and determine the most

probable structural collapse sequence for WTC 1, 2, and 7. Occupant Behavior, Egress, and Emergency

Communications; Project Leader: Mr. Jason

D. Averill

Analyze the behavior and fate of occupants and responders, both

those who survived and those who did not, and the performance of

the evacuation system.

Emergency Response Technologies and

Guidelines; Project Leader: Mr. J. Randall Lawson

Document the activities of the emergency responders from the time

of the terrorist attacks on WTC 1 and WTC 2 until the collapse of

WTC 7, including practices followed and technologies used.

XVlll NISTNCSTAR 1-1 G, WTC Investigation
Preface

NIST WTC Investigation Projects

NIST

Figure P-1. The eight projects in the federal building and fire safety

investigation of the WTC disaster.

National Construction Safety Team Advisory Committee

The NIST Director also established an advisory committee as mandated under the National Construction

Safety Team Act. The initial members of the committee were appointed following a public solicitation. These were:

• Paul Fitzgerald, Executive Vice President (retired) FM Global, National Construction Safety

Team Advisory Committee Chair

• John Barsom, President, Barsom Consulting, Ltd.

• John Bryan, Professor Emeritus, University of Maryland

• David Collins, President, The Preview Group, Inc.

• Glenn Corbett, Professor, John Jay College of Criminal Justice

• Philip DiNenno, President, Hughes Associates, Inc.

NISTNCSTAR 1-1 G, WTC Investigation xix
Preface

• Robert Hanson, Professor Emeritus, University of Michigan

• Charles Thornton, Co-Chairman and Managing Principal, The Thomton-Tomasetti Group,

Inc.

• Kathleen Tiemey, Director, Natural Hazards Research and Applications Information Center,

University of Colorado at Boulder

• Forman Williams, Director, Center for Energy Research, University of California at San

Diego

This National Constmction Safety Team Advisory Committee provided technical advice during the Investigation and commentary on drafts of the Investigation reports prior to their public release. NIST

has benefited from the work of many people in the preparation of these reports, including the National

Construction Safety Team Advisoiy Committee. The content of the reports and recominendations,

however, are solely the responsibility of NIST.

Public Outreach

During the course of this Investigation, NIST held public briefings and meetings (listed in Table P-2) to

solicit input fiom the public, present preliminary findings, and obtain comments on the direction and

progress of the Investigation from the public and the Advisoiy Cominittee.

NIST maintained a publicly accessible Web site during this Investigation at http://wtc.nist.gov. The site contained extensive information on the background and progress of the Investigation.

NIST's WTC Public-Private Response Plan

The collapse of the WTC buildings has led to broad reexamination of how tall buildings are designed,

constructed, maintained, and used, especially with regard to major events such as fires, natural disasters,

and tenorist attacks. Reflecting the enhanced interest in effecting necessary change, NIST, with support

from Congress and the Administration, has put in place a program, the goal of which is to develop and

implement the standards, technology, and practices needed for cost-effective improvements to the safety

and security of buildings and building occupants, including evacuation, emergency response procedures,

and threat mitigation.

The strategy to meet this goal is a three-part NIST-led public-private response program that includes:

• A federal building and fire safety investigation to study the most probable factors that contributed to post-aircraft impact collapse of the WTC towers and the 47-story WTC 7

building, and the associated evacuation and emergency response experience.

• A research and development (R&D) program to (a) facilitate the implementation of

recommendations resulting from the WTC Investigation, and (b) provide the technical basis

for cost-effective improvements to national building and fire codes, standards, and practices

that enhance the safety of buildings, their occupants, and emergency responders.

XX NISTNCSTAR 1-1 G, WTC Investigation
Preface

Table P-2. Public meetings and briefings of the WTC Investigation.

Date Location Principal Agenda

June 24. 2002 New York City, NY Public meeting! Public comments on the Drufi Plun for the pending WTC Investigation.

August 21. 2002 Gaithersburg, MD Media briefing announcinij the formal start of the Investigation.

December 9, 2002 Washington, DC Media briefing on release of the Public Updole and NIST request

for photographs and videos. April 8, 2003 New York Cit>', NY Joint public forum with Columbia University on first-person interviews. April 29-30. 2003 V_J UiLllWl OU'Ui f~f i • 1 NCST Advisorv Committpp mpptiriQ on nlan for and nroprp*;^ on WTC Investigation with a public comment session. Mav 7. 2003 New York Cirv, NY Media hripflnp on tpIprsp of h4nv ^O^i? Prn^^rp^'^ Rpntirl

August 26-27, 2003 Gaithersburg, MD NCST Advisory Committee meeting on status of the WTC

investigation with a public comment session. September l /, zUUJ IN ew Y ork L ity , in y Media and public briefing on initiation of first-person data

rnllprtion nroiprt^; December 2-3. 2003 Gaithersburg, MD NCST Advisory Committee meeting on status and initial results and release of the Public Update with a public comment session. reDruary ii^ -UUh iNew I orK Lity, l\ Y Public meeting on progress and preliminary findings with public

comments on issues to be considered in formulating final rpcnmmpndritinns

June 18. 2004 New York City. NY Media/public briefing on release of June 2004 Progress Report. June 22-23, 2004 Gaithersburg, MD NCST Advisory Committee meeting on the status of and

preliminary findings from the WTC Investigation with a public

comment session. August 24, zUU4 Northbrook, IL Public viewing of standard fire resistance test of WTC floor system at Underwriters Laboratories. Inc. October 19-20, 2004 Gaithersburg, MD NCST Advisory Committee meeting on status and near complete

set of preliminary findings with a public comment session. November 22, 2004 Gaithersburg. MD NCST Advisory Committee discussion on draft annual report to Congress, a public comment session, and a closed session to discuss pre-draft recommendations for WTC Investigation.

April J, zUUj l\ew York city, in y Media and public briefing on release of the probable collapse sequence for the WTC towers and draft reports for the projects on

codes and practices, evacuation, and emergency response. June —J, .-Uuj) Mpm; i\ew VnrV I orK Pin/ ciiy, KIV in i ivieuid anu puuiic orieiing on reiease oi an uiaii reporis loi iiic WTC towers and draft recommendations for public comment.

September 12-13. 2005Gaithersburg, MD NCST Advisory Committee meeting on disposition of public

comments and update to draft reports for the WTC towers. September 13-15,

2005

Gaithersburg. MD WTC Technical Conference for stakeholders and technical community for dissemination of findings and recommendations

and opportunity for public to make technical comments.

• A dissemination and technical assistance program (DTAP) to (a) engage leaders of the construction and building community in ensuring timely adoption and widespread use of

proposed changes to practices, standards, and codes resulting from the WTC Investigation

and the R&D program, and (b) provide practical guidance and tools to better prepare facility owners, contractors, architects, engineers, emergency responders, and regulatory authorities

to respond to future disasters. The desired outcomes are to make buildings, occupants, and first responders safer in future disaster events.

NISTNCSTAR 1-1 G, WTC Investigation xxi
Preface

National Construction Safety Team Reports on the WTC Investigation

A final report on the collapse of the WTC towers is being issued as NIST NCSTAR 1 . A companion

report on the collapse of WTC 7 is being issued as NIST NCSTAR lA. The present report is one of a set that provides more detailed documentation of the Investigation findings and the means by which these

technical results were achieved. As such, it is part of the archival record of this Investigation. The titles of the full set of Investigation publications are:

NIST (National Institute of Standards and Technology). 2005. Federal Building and Fire Safety

Investigation of the World Trade Center Disaster: Final Report on the Collapse ofthe World Trade

Center Towers. NIST NCSTAR 1. Gaithersburg, MD, September.

NIST (National Institute of Standards and Technology). 2006. Federal Building and Fire Safety

Investigation ofthe World Trade Center Disaster: Final Report on the Collapse of World Trade Center 7. NIST NCSTAR lA. Gaithersburg, MD.

Lew, H. S., R. W. Bukowski, and N. J. Carino. 2005. Federal Building and Fire Safety Investigation of

the World Trade Center Disaster: Design, Construction, and Maintenance ofStructural and Life Safety

Systems. NIST NCSTAR 1-1 . National Institute of Standards and Technology. Gaithersburg, MD,

September.

Fanella, D. A., A. T. Derecho, and S. K. Ghosh. 2005. Federal Building and Fire Safety

Investigation of the World Trade Center Disaster: Design and Construction ofStructural Systems.

NIST NCSTAR 1-1 A. National Institute of Standards and Technology. Gaithersburg, MD,

September.

Ghosh, S. K., and X. Liang. 2005. Federal Building and Fire Safety Investigation ofthe World

Trade Center Disaster: Comparison ofBuilding Code Structural Requirements. NIST

NCSTAR 1-lB. National Institute of Standards and Technology. Gaithersburg, MD, September.

Fanella, D. A., A. T. Derecho, and S. K. Ghosh. 2005. Federal Building and Fire Safety

Investigation ofthe World Trade Center Disaster: Maintenance and Modifications to Structural

Systems. NIST NCSTAR 1-lC. National Institute of Standards and Technology. Gaithersburg,

MD, September.

Grill, R. A., and D. A. Johnson. 2005. Federal Building and Fire Safet}' Investigation of the World

Trade Center Disaster: Fire Protection and Life Safety Provisions Applied to the Design and

Construction of World Trade Center 1, 2, and 7 and Post-Construction Provisions Applied after Occupancy. NIST NCSTAR I-ID. National Institute of Standards and Technology. Gaithersburg,

MD, September.

Razza, J. C, and R. A. Grill. 2005. Federal Building and Fire Safety Investigation of the World

Trade Center Disaster: Comparison of Codes, Standards, and Practices in Use at the Time ofthe Design and Construction of World Trade Center I, 2, and 7. NIST NCSTAR 1-lE. National

Institute of Standards and Technology. Gaithersburg, MD, September.

Grill, R. A., D. A. Johnson, and D. A. Fanella. 2005. Federal Building and Fire Safety

Investigation of the World Trade Center Disaster: Comparison of the 1968 and Current (2003) New

xxn NIST NCSTAR 1-1 G, WTC Investigation
Preface

York City Building Code Provisions. NIST NCSTAR 1 -IF. National Institute of Standards and

Technology. Gaithersburg, MD, September.

Grill, R. A., and D. A. Johnson. 2005. Federal Building and Fire Safety Investigation of the World

Trade Center Disaster: Amendments to the Fire Protection and Life Safety Provisions ofthe New

York City Building Code by Local Laws Adopted While World Trade Center 1, 2, and 7 Were in Use. NIST NCSTAR 1-lG. Nationallnstitute of Standards and Technology. Gaithersburg, MD,

September.

Grill, R. A., and D. A. Johnson. 2005. Federal Building and Fire Safety Investigation of the World

Trade Center Disaster: Post-Construction Modifications to Fire Protection and Life Safety Systems

of World Trade Center 1 and 2. NIST NCSTAR 1-lH. National Institute of Standards and

Technology. Gaithersburg, MD, September.

Grill, R. A., D. A. Johnson, and D. A. Fanella. 2005. Federal Building and Fire Safety Investigation

ofthe World Trade Center Disaster: Post-Construction Modifications to Fire Protection, Life

Safety, and Structural Systems of World Trade Center 7. NIST NCSTAR l-ll. National Institute of

Standards and Technology. Gaithersburg, MD, September.

Grill, R. A., and D. A. Johnson. 2005. Federal Building and Fire Safety Investigation ofthe World

Trade Center Disaster: Design, Installation, and Operation ofFuel System for Emergency Power in World Trade Center 7. NIST NCSTAR 1-1 J. National Institute of Standards and Technology.

Gaithersburg, MD, September.

Sadek, F. 2005. Federal Building and Fire Safety' Investigation of the World Trade Center Disaster:

Baseline Structural Performance and Aircraft Impact Damage Analysis of the World Trade Center

Towers. NIST NCSTAR 1-2. National Institute of Standards and Technology. Gaithersburg, MD,

September.

Faschan, W. J., and R. B. Garlock. 2005. Federal Building and Fire Safety Investigation ofthe World Trade Center Disaster: Reference Structural Models and Baseline Performance Analysis of

the World Trade Center Towers. NIST NCSTAR 1-2 A. National Institute of Standards and

Technology. Gaithersburg, MD, September.

Kirkpatrick, S. W., R. T. Bocchieri, F. Sadek, R. A. MacNeill, S. Holmes, B. D. Peterson, R. W. Cilke, C. Navarro. 2005. Federal Building and Fire Safety Investigation ofthe World Trade

Center Disaster: Analysis ofAircraft Impacts into the World Trade Center Towers, NIST

NCSTAR 1-2B. National Institute of Standards and Technology. Gaithersburg, MD, September.

Gayle, F. W., R. J. Fields, W. E. Luecke, S. W. Banovic, T. Foecke, C. N. McCowan, T. A. Siewert, and

J. D. McColskey. 2005. Federal Building and Fire Safety Investigation ofthe World Trade Center

Disaster: Mechanical and Metallurgical Analysis ofStructural Steel. NIST NCSTAR 1-3. National

Institute of Standards and Technology. Gaithersburg, MD, September.

Luecke, W. E., T. A. Siewert, and F. W. Gayle. 2005. Federal Building and Fire Safety

Investigation ofthe World Trade Center Disaster: Contemporaneous Structural Steel

Specifications. NIST Special Publication 1-3 A. Nationallnstitute of Standards and Technology.

Gaithersburg, MD, September.

NIST NCSTAR 1-1 G, WTC Investigation xxni
Preface

Banovic, S. W. 2005. Federal Building and Fire Safety Investigation ofthe World Trade Center

Disaster: Steel Inventoiy and Identification. NIST NCSTAR 1-3B. National Institute of Standards

and Technology. Gaithersburg, MD, September.

Banovic, S. W., and T. Foecke. 2005. Federal Building and Fire Safety Investigation of the World

Trade Center Disaster: Damage and Failure Modes ofStructural Steel Components. NIST

NCSTAR 1-3C. National Institute of Standards and Technology. Gaithersburg, MD, September.

Luecke, W. E., J. D. McColskey, C. N. McCowan, S. W. Banovic, R. J. Fields, T. Foecke,

T. A. Siewert, and F. W. Gayle. 2005. Federal Building and Fire Safety Investigation ofthe World

Trade Center Disaster: Mechanical Properties ofStructural Steels. NIST NCSTAR 1-3D.

National Institute of Standards and Technology. Gaithersburg, MD, September.

Banovic, S. W., C. N. McCowan, and W. E. Luecke. 2005. Federal Building and Fire Safety

Investigation of the World Trade Center Disaster: Physical Properties ofStructural Steels. NIST

NCSTAR 1-3E. National Institute of Standards and Technology. Gaithersburg, MD, September.

Evans, D. D., R. D. Peacock, E. D. Kuligowski, W. S. Dols, and W. L. Grosshandler. 2005. Federal

Building and Fire Safety Investigation ofthe World Trade Center Disaster: Active Fire Protection

Systems. NIST NCSTAR 1-4. National Institute of Standards and Technology. Gaithersburg, MD,

September.

Kuligowski, E. D., D. D. Evans, and R. D. Peacock. 2005. Federal Building and Fire Safety

Investigation of the World Trade Center Disaster: Post-Construction Fires Prior to September II, 2001. NIST NCSTAR 1-4A. National Institute of Standards and Technology. Gaithersburg, MD,

September.

Hopkins, M., J. Schoenrock, and E. Budnick. 2005. Federal Building and Fire Safety Investigation

ofthe World Trade Center Disaster: Fire Suppression Systems. NIST NCSTAR 1-4B. National

Institute of Standards and Technology. Gaithersburg, MD, September.

Keough, R. J., and R. A. Grill. 2005. Federal Building and Fire Safet}' Investigation ofthe World

Trade Center Disaster: Fire Alarm Systems. NIST NCSTAR 1-4C. National Institute of Standards

and Technology. Gaithersburg, MD, September.

Ferreira, M. J., and S. M. Strege. 2005. Federal Building and Fire Safety' Investigation ofthe World Trade Center Disaster: Smoke Management Systems. NIST NCSTAR 1 -4D. National

Institute of Standards and Technology. Gaithersburg, MD, September.

Gann, R. G., A. Hamins, K. B. McGrattan, G. W. Mulholland, H. E. Nelson, T. J. Ohlemiller,

W. M. Pitts, and K. R. Prasad. 2005. Federal Building and Fire Safety Investigation ofthe World Trade

Center Disaster: Reconstruction ofthe Fires in the World Trade Center Towers. NIST NCSTAR 1-5. National Institute of Standards and Technology. Gaithersburg, MD, September.

Pitts, W. M., K. M. Butler, and V. Junker. 2005. Federal Building and Fire Safet}' Investigation of

the World Trade Center Disaster: Visual Evidence, Damage Estimates, and Timeline Analysis.

NIST NCSTAR 1-5 A. National Institute of Standards and Technology. Gaithersburg, MD,

September.

xxiv NIST NCSTAR 1-1G, WTC Investigation
Preface

Hamins, A., A. Maranghides, K. B. McGrattan, E. Johnsson, T. J. Ohlcmillcr, M. Donnelly,

J. Yang, G. Mulholland, K. R. Prasad, S. Kukuck, R. Anleitner and T. McAllister. 2005. Federal

Building and Fire Safety Investigation ofthe World Trade Center Disaster: Experiments and

Modeling ofStructural Steel Elements Exposed to Fire. NIST NCSTAR 1-5B. National Institute of

Standards and Technology. Gaithersburg, MD, September.

Ohlemiller, T. J., G. W. Mulholland, A. Maranghides, J. J. Filliben, and R. G. Gann. 2005. Federal

Building and Fire Safety Investigation ofthe World Trade Center Disaster: Fire Tests ofSingle

Office Workstations. NIST NCSTAR 1-5C. National Institute of Standards and Technology.

Gaithersburg, MD, September.

Gann, R. G., M. A. Riley, J. M. Repp, A. S. Whittaker, A. M. Reinhom, and P. A. Hough. 2005.

Federal Building and Fire Safety Investigation of the World Trade Center Disaster: Reaction of

Ceiling Tile Systems to Shocks. NIST NCSTAR 1-5D. National Institute of Standards and

Technology. Gaithersburg, MD, September.

Hamins, A., A. Maranghides, K. B. McGrattan, T. J. Ohlemiller, and R. Anleitner. 2005. Federal

Building and Fire Safet}> Investigation of the World Trade Center Disaster: Experiments and

Modeling ofMultiple Workstations Burning in a Compartment. NIST NCSTAR 1-5E. National

Institute of Standards and Technology. Gaithersburg, MD, September.

McGrattan, K. B., C. Bouldin, and G. Forney. 2005. Federal Building and Fire Safety

Investigation of the World Trade Center Disaster: Computer Simulation ofthe Fires in the World

Trade Center Towers. NIST NCSTAR 1-5F. National Institute of Standards and Technology.

Gaithersburg, MD, September.

Prasad, K. R., and H. R. Baum. 2005. Federal Building and Fire Safety Investigation ofthe World

Trade Center Disaster: Fire Structure Interface and Thermal Response of the World Trade Center

Towers. NIST NCSTAR 1-5G. National Institute of Standards and Technology. Gaithersburg,

MD, September.

Gross, J. L., and T. McAllister. 2005. Federal Building and Fire Safety Investigation of the World Trade

Center Disaster: Structural Fire Response and Probable Collapse Sequence ofthe World Trade Center

Towers. NIST NCSTAR 1-6. National Institute of Standards and Technology. Gaithersburg, MD,

September.

Carino, N. J., M. A. Stames, J. L. Gross, J. C. Yang, S. Kukuck, K. R. Prasad, and R. W. Bukowski.

2005. Federal Building and Fire Safety Investigation ofthe World Trade Center Disaster: Passive

Fire Protection. NIST NCSTAR 1-6A. National Institute of Standards and Technology.

Gaithersburg, MD, September.

Gross, J., F. Hervey, M. Izydorek, J. Mammoser, and J. Treadway. 2005. Federal Building and

Fire Safety Investigation ofthe World Trade Center Disaster: Fire Resistance Tests ofFloor Truss

Systems. NIST NCSTAR 1-6B. National Institute of Standards and Technology. Gaithersburg,

MD, September.

Zarghamee, M. S., S. Bolourchi, D. W. Eggers, O. O. Erbay, F. W. Kan, Y. Kitane, A. A. Liepins,

M. Mudlock, W. I. Naguib, R. P. Ojdrovic, A. T. Sarawit, P. R Barrett, J. L. Gross, and

NIST NCSTAR 1-1G, WTC Investigation XXV
Preface

T. P. McAllister. 2005. Federal Building and Fire Safety Investigation ofthe World Trade Center

Disaster: Component, Connection, and Subsystem Structural Analysis. NIST NCSTAR 1-6C.

National Institute of Standards and Technology. Gaithersburg, MD, September.

Zarghamee, M. S., Y. Kitane, O. O. Erbay, T. P. McAllister, and J. L. Gross. 2005. Federal

Building and Fire Safety Investigation ofthe World Trade Center Disaster: Global Structural

Analysis ofthe Response ofthe World Trade Center Towers to Impact Damage and Fire. NIST

NCSTAR 1-6D. National Institute of Standards and Technology. Gaithersburg, MD, September.

McAllister, T., R. W. Bukowski, R. G. Gann, J. L. Gross, K. B. McGrattan, H. E. Nelson, L. Phan,

W. M. Pitts, K. R. Prasad, F. Sadek. 2006. Federal Building and Fire Safety Investigation ofthe World

Trade Center Disaster: Structural Fire Response and Probable Collapse Sequence of World Trade

Center?. (Provisional). NIST NCSTAR 1-6E. National Institute of Standards and Technology.

Gaithersburg, MD.

Gilsanz, R., V. Arbitrio, C. Anders, D. Chlebus, K. Ezzeldin, W. Guo, P. Moloney, A. Montalva,

J. Oh, K. Rubenacker. 2006. Federal Building and Fire Safety Investigation ofthe World Trade

Center Disaster: Structural Analysis ofthe Response of World Trade Center 7 to Debris Damage

and Fire. (Provisional). NIST NCSTAR 1-6F. National Institute of Standards and Technology.

Gaithersburg, MD.

Kim, W. 2006. Federal Building and Fire Safety Investigation ofthe World Trade Center

Disaster: Analysis ofSeptember 1 1, 2001, Seismogram Data. (Provisional). NIST NCSTAR 1-6G.

National Institute of Standards and Technology. Gaithersburg, MD.

Nelson, K. 2006. Federal Building and Fire Safet}' Investigation ofthe World Trade Center

Disaster: The Con Ed Substation in World Trade Center 7. (Provisional). NIST NCSTAR I-6H.

National Institute of Standards and Technology. Gaithersburg, MD.

Averill, J. D., D. S. Mileti, R. D. Peacock, E. D. Kuligowski, N. Groner, G. Proulx, P. A. Reneke, and

H. E. Nelson. 2005. Federal Building and Fire Safety Investigation ofthe World Trade Center Disaster:

Occupant Behavior, Egress, and Emergency Communication. NIST NCSTAR 1-7. National Institute of

Standards and Technology. Gaithersburg, MD, September.

Fahy, R., and G. Proulx. 2005. Federal Building and Fire Safet}' Investigation ofthe World Trade

Center Disaster: Analysis ofPublished Accounts of the World Trade Center Evacuation. NIST

NCSTAR 1-7A. National Institute of Standards and Technology. Gaithersburg, MD, September.

Zmud, J. 2005. Federal Building and Fire Safety Investigation of the World Trade Center

Disaster: Technical Documentationfor Sm-vey Administration. NIST NCSTAR 1-7B. National

Institute of Standards and Technology. Gaithersburg, MD, September.

Lawson, J. R., and R. L. Vettori. 2005. Federal Building and Fire Safety Investigation ofthe World

Trade Center Disaster: The Emergency Response Operations. NIST NCSTAR 1-8. National Institute of

Standards and Technology. Gaithersburg, MD, September.

xxvi NIST NCSTAR 1-1G, WTC Investigation
Executive Summary

As part of the analysis of building and fire codes and practices of the National Institute of Standards and

Technology (NIST) World Trade Center (WTC) Investigation, this report supports the effort to document

the changes in building code regulations that occurred after construction of WTC 1 and WTC 2. WTC 1 and WTC 2 were to be designed and constructed in accordance with the Building Code of the City of New York (BCNYC) as enacted by Local Law No. 76 for the year 1968, effective December 6, 1968 (referred to as the "new code").

This report is not intended to give a complete history of the BCNYC. The purpose of this report is to provide an evolution of the life safety provisions of the BCNYC since the design of WTC 1 and WTC 2, including retroactive provisions for existing high-rise office towers. The evolution of the New York City

code begins with a brief overview of the BCNYC prior to 1968 (referred to as the "old code") and

reviews the various local laws that have amended fire protection and life safety provisions of the code

from 1968 until the collapse of the WTC towers on September 1 1, 2001.

The BCNYC that became effective on January 1, 1938, had remained in effect and was edited and

amended by local laws until 1968. Local Law 76 for the year 1968 repealed the 1938 BCNYC; however,

buildings in existence prior to 1968 are still pemiitted to be altered in accordance with the 1938 BCNYC,

provided the general safety and public welfare are not thereby endangered, in the opinion of the Authority

Having Jurisdiction.

The BCNYC is a part of the Administrative Code of the City of New York. From 1968 until 1985, the BCNYC was part of Title 'C of Chapter 26 of the Administrative Code. In 1985, the Administrative

Code was reorganized and renumbered. The General Provisions of the Department of Buildings are currently organized under Chapter 1 of Title 26 - Housing and Buildings. The BCNYC is currently

Chapter 1 of Title 27 - Construction and Maintenance. Due to the reorganization of the Administrative

Code, BCNYC section numbers before 1985 are preceded with "C26-" and section numbers after 1985

are preceded by "27-."

To amend the Administrative Code of the City of New York, including the BCNYC, a bill (proposed

legislation) must be introduced in the City Council. When the bill is approved by the City Council and

signed by the Mayor, then it becomes a Local Law.

Through the years, serious incidents such as fires, and in most cases, fires that have resulted in the loss of

innocent lives, have caused the need to change certain code requirements. In most cases, a Local Law

added or modified requirements for new construction or major alterations. In other cases, the Local Law

included retroactive provisions that were applicable to buildings existing on the effective date of such

Local Law.

NISTNCSTAR 1-1 G, WTC Investigation XXVII
Executive Summary

The applicable Local Laws that have amended the fire protection and life safety provisions of the BCNYC include, but are not limited to:

1. 1970 - Local Law No. 54, Local Laws of the City of New York for the Year 1970 (effective

date immediately), November 17, 1970

2. 1973 - Local Law No. 5, Fire Safety Requirements and Controls (effective date immediately

except as noted), January 18, 1973

3. 1975 - Local Law No. 26, Local Laws of the City of New York for the Year 1975 (effective

date immediately), June 2, 1975

4. 1976 - Local Law No. 55, Local Laws of the City of New York for the Year 1976 (effective

date immediately), November 1, 1976

5. 1978 - Local Law No. 33, Local Laws of the City of New York for the Year 1978 (effective

date immediately), October 6, 1978

6. 1978 - Local Law No. 41, Local Laws of the City of New York for the Year 1978 (effective

30 days after enactment), December 13, 1978

7. 1979 - Local Law No. 84, Fire Safety Pressurization Requirements in Certain Office

Buildings (effective date immediately), December 13, 1979

8. 1979 - Local Law No. 86, Dates for Compliance with the Local Laws Enacted for Fire

Safety Requirements and Controls in Certain Buildings (effective date immediately),

December 13, 1979

9. 1984 - Local Law No. 16, Local Laws of the City of New York for the Year 1984 (effective

date immediately except as noted), March 27, 1984

10. 1987 - Local Law No. 16, Local Laws of the City of New York for the Year 1987 (effective

date immediately), April 20, 1987

Since 1968, the BCNYC Reference Standards have been updated by various New York City procedures

and authorities including Local Laws passed by the City Council, Building Code Rules approved by the New York City Board of Standards and Appeals until 1991, and by the authority of the Building

Commissioner, after 1991 . Included in this report is a summary of the applicable fire protection and life safety reference standards and the effective dates. Most Reference Standards are nationally recognized

standards (ASTM International, National Fire Protection Association, etc.) that New York City references

(often with New York City modifications). Other Reference Standards are developed by the New York

City Department of Buildings (e.g., Standpipe Construction, Fire Alarm Systems).

xxviii NISTNCSTAR 1-1G, WTC Investigation
Chapter 1 Introduction

The purpose of this report is to provide an evolution of the life safety provisions of the Building Code of

the City of New York (BCNYC) since the design of World Trade Center (WTC) 1 and WTC 2, including

retroactive provisions for existing high-rise office towers. WTC 1 and WTC 2 were to be designed and constructed in accordance with the BCNYC as enacted by

Local Law No. 76 for the year 1968, effective December 6, 1968 (referred to as the "new code").

The BCNYC is a part of the Administrative Code of the City of New York. The latest major overhaul of

the BCNYC occurred in 1968. Since then, several Local Laws have been approved by the City Council

and the Mayor of the City of New York to amend the BCNYC. Most Local Laws amend certain provisions of the BCNYC and pertain to new construction or new installations of equipment. However, some Local Laws have retroactive provisions that apply to existing buildings or structures.

The first Local Law that is signed by the Mayor for a particular year is Local Law No. 1 for that year. It

is important to associate a Local Law number with the year it was passed. For example. Local Law No. 5 for the year 1973 is not the same as Local Law No. 5 for 1972 or Local Law No. 5 for 1974, etc.

This report is intended to summarize the Local Laws that have had an impact on fire protection and life safety related requirements and that may provide an understanding about the requirements that were

applicable in the design, construction, and alterations of WTC 1, 2, and 7.

The most notable of the Local Laws that have amended the fire protection and life safety provisions of the BCNYC are Local Law No. 5 for the year 1973 and Local Law No. 16 for the year 1984. Local Law

No. 5 and Local Law No. 16 contain several retroactive fire protection and life-safety-related

requirements for existing buildings, including automatic sprinkler systems, compartmentation, stair pressurization, fire alarm and communication systems, emergency power systems and smoke control provisions.

Chapter 2 includes a list of the Local Laws containing fire protection and life safety provisions.

Table 2-1 provides the effective dates of various Local Laws amending the BCNYC. The Local Laws

containing fire protection and life safety provisions are presented in Chapter 4 in chronological order

beginning with Local Law No. 54 for the year 1970.

In addition to the BCNYC, several amendments have been made to the Reference Standards of the Code.

As the Code was updated and new technologies and industry standards became available, it was necessary

to update the Reference Standards. Most Reference Standards are nationally recognized standards such as those published by the American National Standards Institute, ASTM International and the National Fire

Protection Association. Other Reference Standards are promulgated by the New York City Department

of Buildings, such as the reference standards for standpipe systems and the Reference Standards for fire alarm systems.

NISTNCSTAR 1-1 G. WTC Investigation 1
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NISTNCSTAR 1-1 G, WTC Investigation
Chapter 2

General

2.1 LOCAL LAWS CONTAINING FIRE PROTECTION/LIFE SAFETY

PROVISIONS

1. 1970 - Local Law No. 54, Local Laws of the City of New York for the Year 1970 (effective

date immediately), November 17, 1970

2. 1973 - Local Law No. 5, Fire Safety Requirements and Controls (effective date immediately

except as noted), January 18, 1973

3. 1975 - Local Law No. 26, Local Laws of the City of New York for the Year 1975 (effective

date immediately), June 2, 1975

4. 1976 - Local Law No. 55, Local Laws of the City of New York for the Year 1976 (effective

date immediately), November 1, 1976

5. 1978 - Local Law No. 33, Local Laws of the City of New York for the Year 1978 (effective

date immediately), October 6, 1978

6. 1978 - Local Law No. 41, Local Laws of the City of New York for the Year 1978 (effective

30 days after enactment), December 13, 1978

7. 1979 - Local Law No. 84, Fire Safety Pressurization Requirements in Certain Office

Buildings (effective date immediately), December 13, 1979

8. 1979 - Local Law No. 86, Dates for Comphance with the Local Laws Enacted for Fire

Safety Requirements and Controls in Certain Buildings (effective date immediately),

December 13, 1979

9. 1 984 - Local Law No. 1 6, Local Laws of the City of New York for the Year 1 984 (effective

date immediately except as noted), March 27, 1984

10. 1987 - Local Law No. 16, Local Laws of the City of New York for the Year 1987 (effective

date immediately), April 20, 1987

NISTNCSTAR 1-1G, WTC Investigation 3
Chapter 2

2.2 EFFECTIVE DATES OF LOCAL LAWS AMENDING THE BUILDING CODE

Table 2-1 . Effective dates o ' Local Laws.

Year Local Law Effective Date Comments

1969 61 December 4. 1 969

1969 65 December 22, 1969

1969 73 December 20. 1969

1970 54 November 17, 1970

Fire protection/life safety

amendments

1971 75 December 22, 1971

1972 39 June 1, 1972

1972 76 November 6, 1972

1973 5 January 18, 1973

Fire protection/life safety

amendments with retroactive requirements for office buildings

1973 50 September 21, 1973

1973 58 October 15, 1973

1973 80 December 28. 1973 1973 85 December 28, 1973

1974 7 May 16, 1974

1975 13 March 31, 1975

1975 26 June 2, 1975 1976 55 November 1, 1976

1lyQlfilO Oj December 10, 1976

1 Q77 o / September 30, 1977

1 Q77 \)y September 30, 1977

1 Q78 January 1979

1\yQ7Q1 y 7Q/ y December 4, 1979

1979 84 December 14, 1979

1979 86 December 14, 1979

1981 21 March 19 1981

1982 12 March 5 198^

1982 30 June 15 198''

1983 58 November 16 1983

1984 16 March 27, 1984

Fire protection/life safety

amendments with retroactive requirements

1984 45 July 12. 1984

1986 80 December 22, 1986

1986 82 December 30, 1986

1987 9 March 5, 1987

1987 13 March 23, 1987

4 NISTNCSTAR 1-1 G, WTC Investigation
General

1 Year Local Law Effective Date Comments

1987 16 April 20, 1987 Amended Local Law 16/1984

1987 29 June 30, 1987

1987 40 July 6, 1987 1987 58 August 5, 1987 1987 61 November 3, 1987 1988 11 March 9, 1988 1988 33 May 27, 1988

1988 34 February 2, 1988 1988 46 July 11, 1988

1988 49 July 11, 1988

1988 50 July 11, 1988

1988 58 January 1, 1989

1988 65 November 4, 1988

1988 73 Decembers, 1988

1988 77 June 8, 1988

1989 14 April 13, 1989

1989 29 November 16, 1989

1989 38 June 28, 1989

1989 55 January 25, 1990

1989 80 Novembers, 1989

1989 81 February 6, 1990

1989 90 December 6, 1989

1989 100 December 27, 1989

1989 103 December 27, 1989

1990 23 July 7, 1990

1990 38 August 11, 1990

1990 65 November 14, 1990

1991 33 August 23, 1991

1991 48 July 1, 1991

1991 49 July 1, 1991

1991 54 July 1, 1991

1991 55 July 17, 1991

1991 62 January 1, 1992

1991 72 October 21, 1991

1991 99 February 21, 1992

1992 18 March 9, 1992

1993 6 March 22, 1993

1993 12 January 22, 1994

1993 13 January 22, 1994

NISTNCSTAR 1-1 G, WTC Investigation 5
Chapter 2

Year Local Law Effective Date Comments

1993 14 February 9, 1993

1993 15 February 9, 1993

1993 39 May 28. 1993

1993 53 June 30, 1993

1993 56 June 30, 1993

1999 10 March 24, 1999

Residential sprinklers and fire safety plans

2002 26 August 15. 2002 Mercantile sprinklers Source: Building Code of the City of New York.

6 NISTNCSTAR 1-1 G. WTC Investigation
Chapter 3

History of the New York City Building Code

Building regulations in New York City date back to 1625 when the Dutch West India Company

established rules for the types and locations of houses that could be built by the colonists of New

Amsterdam. Extensive laws governing construction and fire prevention were in place by 1674.

This chapter is not intended to give a complete history of the Building Code of the City of New York

(BCNYC). The specific task of this report is to provide an understanding of the evolution of the BCNYC

since the design of World Trade Center (WTC) 1 and WTC 2, which is understood to be circa 1968.

Since the current BCNYC permits buildings in existence prior to December 6, 1968, to be altered in compliance with the applicable laws in existence prior to 1968, this chapter also includes a brief overview

of the 1938 Building Code, often referred to as the "old code."

3.1 1938 BUILDING CODE (OLD CODE)

The BCNYC in existence prior to 1938 was repealed and replaced with a code that became effective on

January 1, 1938. For 30 years, this version of the BCNYC was enforced throughout the five boroughs

of New York City. It was edited and amended by Local Laws on December 6, 1968, when Local Law

No. 76 for the year 1968 repealed the 1938 Code. Buildings in existence prior to 1968 are permitted to be

altered in accordance with the 1938 BCNYC, provided the general safety and public welfare are not thereby endangered in the opinion of the Authorities Having Jurisdiction.

3.2 1968 BUILDING CODE (THEN CURRENT CODE)

On November 6, 1968, Local Law No. 76 of the City of New York was approved by the Mayor. Local

Law No. 76 was "A Local Law to amend the New York City charter and the administrative code of the

city of New York, in relation to revising the city's code and providing for powers and duties of the department of buildings and certain other city departments with respect to buildings and matters related

thereto."

Titles A, B, and C of Chapter 26 of the Administrative Code of the City of New York (the 1938 BCNYC)

were repealed and reenacted under sec. 1 of Local Law No. 76. Part II of Title C is known and may be

cited as the "building code of the city of New York" (Sec. C26- 100.1).

The Local Law became effective 30 days after it was enacted. Therefore, the effective date of Local Law

No. 76 for the year 1968, including the Building Code, is December 6, 1968.

Among other requirements, occupancy and construction classifications changed from the 1938 BCNYC

to the 1968 BCNYC. For example, an office building constructed in accordance with the 1938 BCNYC

is classified as a commercial occupancy, whereas the same building in the 1968 BCNYC is classified

as Occupancy Group E - Business. Under the 1938 BCNYC, a tall office building must be constructed

in the construction classification of fireproof (4 h). The same building constructed under the

NISTNCSTAR 1-1 G. WTC Investigation 7
Chapter 3

1968 BCNYC may be constructed in construction type lA (4 h) or IB (3 h). In 1973, Local Law No. 5 (1973) added another possible classification, IC (2 h), which required the installation of automatic

sprinklers.

8 NISTNCSTAR 1-1G, WTC Investigation
Chapter 4

Evolution of Building Code since 1968

Through the years, serious incidents such as fires, and in most cases, fires that have resuhed in the loss of

innocent Hves, have caused the need to change certain code requirements. In most cases, a Local Law

added requirements for new constRiction or major alterations. In other cases, the Local Law included

retroactive provisions that were applicable to buildings existing on the effective date of such Local Law.

This chapter identifies the Local Laws that have included substantial modifications to the fire protection

and/or life safety provisions of Building Code of the City of New York (BCNYC). Highlights of each of

the Local Laws are provided.

4.1 1970 - LOCAL LAW NO. 54, POWERS AND DUTIES OF THE

DEPARTMENT OF BUILDINGS

Local Law No. 54 for the year 1970 (LL 54/1970) was approved "to amend the administrative code of the

city of New York, in relation to further clarifying and correcting provisions relating to the powers and

duties of the department of buildings."

Although the title of LL 54/1970 refers to powers and duties of the department of buildings, LL 54/1970

amended several sections of the Building Code, including the following fire protection/life safety

provisions:

• C26-504.6 - Shafts (LL 54, sec. 4)

• C26-600.3 - Inadequate exits for existing structures (LL 54, sec. 5)

• C26-604. 3(h)(3) - Street floor lobbies as exit passageways (LL 54, sec. 6)

• C26-604.4(j)(l)(b) - Locking of doors opening into interior enclosed stairs (LL 54, sec. 7)

• C26-604.8(b) - Width of interior enclosed stairs (LL 54, sec. 8)

• C26-604.8(i)(2) - Access stairs (LL 54, sec. 9)

• Table 6-1 - Exit and Access Requirements (LL 54, sec. 10)

• C26-1800.8 - Elevator in readiness (LL 54, sec. 16)

• C26- 1804.1 - Elevator operators (LL 54, sec. 17)

The new and amended requirements in LL 54/1970 were applicable to new construction and alterations

after the effective date, but were not retroactive for existing buildings.

LL 54/1970 was approved by the Mayor on November 17, 1970, and became effective iminediately.

NISTNCSTAR 1-1G, WTC Investigation 9
Chapter 4

4.2 1973 - LOCAL LAW NO. 5, FIRE SAFETY REQUIREMENTS IN CERTAIN

OFFICE BUILDINGS

After five fatalities that occurred in two high-rise buildings in New York City in 1970, a Mayor's

Advisoiy Committee on Fire Safety in High-Rise Buildings was commissioned to "undertake an

extraordinary effort to further improve the safety of our major working environment, the high-rise tower." The Report of Mayor's Advisory Committee on Fire Safety in High-Rise Buildings was released in November 1971.

As a result of the report. Local Law No. 5 for the year 1973 (LL 5/1973) was approved by Mayor John V. Lindsay on January 18, 1973, and was to take effect immediately. LL 5/1973 was described as a "Local

Law to amend the administrative code of the city of New York, in relation to fire safety requirements and

controls in certain office buildings."

LL 5/1973 consists of 44 sections and at that time it was "the most comprehensive set of fire safety

improvements ever proposed in any jurisdiction."

Enacted in 1973 and further amended by Local Law No. 26/1975 (LL 26/1975), LL 5/1973 was the subject of a lengthy period of litigation and appeals. The Court of Appeals rendered a final decision on December 26, 1978, upholding Local Law No. 5 in its entirety.

Sections of the Fire Prevention Code and Building Code were amended by LL 5/1973. This local law

provided requirements for new buildings in occupancy group E as well as retroactive provisions in existing office buildings.

The major highlights of LL 5/1973 are summarized in the following sections.

4.2.1 Fire Safety in Office Buildings

A new sec. C19-161 .2 was added to the New York City Fire Prevention Code to provide for fire safety in office buildings. This new section requires new occupancy group E buildings and existing office buildings with an occupant load of more than 100 persons above or below the street level or more than

500 persons in the entire building to provide a fire safety plan for fire drill and evacuation procedures.

As part of the Fire Safety Plan, Fire Safety Directors, Deputy Fire Safety Directors, Building Evacuation

Supervisors, and Fire Brigades must be provided. In addition, stair and elevator signs must be posted and

maintained in accordance with the requirements of the BCNYC (LL 5, sec. 1).

4.2.2 Compartmentation

Section C26-504.1(c) was added to require unsprinklered floor areas, more than 40 ft above curb level, in new buildings in occupancy group E and existing office buildings 100 ft or more in height "having air- conditioning and/or mechanical ventilation systems that serve more than the floor on which the equipment

is located," to be subdivided by 1 h fire separations into spaces or compartments not to exceed 7,500 ft'. Floor areas may be increased up to 15,000 ft" if protected by 2 h fire-resistive construction and smoke

detectors. Regardless of the floor area, compartmentation is not required when complete sprinkler

protection is provided (LL 5, sec. 6).

10 NISTNCSTAR 1-1G, WTC Investigation
Evolution of Building Code Since 1968

4.2.3 Smoke and Heat Venting

Section C26-504-15 was added to require new buildings in occupancy group E, 100 ft or more in height,

having air-conditioning and/or mechanical ventilation systems that serve more than the floor on which the equipment is located, to be provided with at least one smoke shaft by means of which smoke and heal

shall be mechanically vented to the outdoors as provided in Reference Standard (RS) 5-17.

Existing office buildings, 100 ft or more in height, having air-conditioning and/or mechanical ventilation

systems that serve more than the floor on which the equipment is located, have an option of providing the smoke shaft in accordance with RS 5-17 or in lieu of the smoke shafts, may provide a system of

pressurization in all interior enclosed stairs other than a fire tower stair for emergency use only.

Buildings that are sprinklered throughout are exempt from the smoke shaft and stair pressurization

requirements (LL 5, sec. 7).

4.2.4 Means of Egress

Several sections of Article 6 of the BCNYC were amended to provide for signs in new and existing office buildings regarding the use of elevators and stairs. Additional provisions perniit all stair doors to be

locked from the stair side in buildings less than 100 ft in height. In buildings over 100 ft in height, the

stair doors on every fourth floor are required to be openable to provide for re-entry from the stair. However, all the doors may be locked if they are provided with safety features such as fail-safe system in the event of loss of power and interface with the fire alann system and the phase 1 elevator recall system.

Section C26-600. 1 was amended to clarify the scope of the regulation with respect to new, altered,

changed in occupancy, existing, and special use buildings (LL 5, sec. 8).

Section C26-604.4 was amended to pennit locking of certain doors from the stair side in buildings in occupancy group E (LL 5, sec. 9).

Section C26-607.1 was amended to address retroactive provisions of LL 5/1973 for signs and exit lighting

(LL5, sec. 10).

Sub-Article 608 (sees. C26-608.1 through C26-608.7) was added regarding Stair and Elevator Signs in Office Buildings (LL 5, sec. 1 1).

4.2.5 Sprinklers

Subdivision (i) of sec. C26-1703.1 was added and Table 17-2 was amended to require sprinklers in showroom spaces exceeding 7,500 ft" in area and located more than 40 ft above curb level in new

buildings in occupancy group E and existing office buildings, 100 ft or more in height having air- conditioning and/or mechanical ventilation systems that serve more than the floor on which the equipment

is located (LL 5, sec. 16).

Subdivision (d) was added to sec. C26-1702.14 and subdivision (g) was added to sec. C26-1 703.9 to allow standpipe systems to be used to supply water to sprinklers in buildings classified in occupancy

NISTNCSTAR 1-1 G, WTC Investigation
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group E, 100 ft or more in height, and in existing office buildings, 100 ft or more in height, in accordance

with the applicable provisions of RS 17-1 and RS 17-2 (LL 5, sec. 14, 20).

4.2.6 Interior Fire Alarm Signal and Voice Communication Systems

Prior to 1973, a fire alarm system was not required for a building in occupancy group E (new code) or commercial office buildings (old code). Only a standpipe fireline telephone and signaling system was

required in buildings over 300 ft in height for fire department use in operating the standpipe system.

A new paragraph (9) was added to sec. C26-1704. 1(a) to require a fire alarm system in buildings

classified in occupancy group E, 100 ft or more in height (LL 5, sec. 21).

Two new subdivisions (g) and (h) were added to sec. C26- 1704.4 to provide requirements for class E and

modified class E fire alarm signal systems, respectively (LL 5, sec. 23).

Two new subdivisions (f) and (g) were added to sec. C26-1 704.5 for the requirements of fire alarni systems in new buildings in occupancy group E and existing office buildings 100 ft or more in height

(LL 5, sec. 25).

Subdivision (h) was added to sec. C26- 1704.5 for the requirements of two-way voice communication and

fire alarm signal system for buildings in occupancy group E and existing office buildings, less than 100 ft

in height, occupied for an occupant load of more than 100 persons above or below the street level or more

than a total of 500 persons in the entire building (LL 5, sec. 25).

A new sec. C26- 1704.8 was added regarding the requirements for coiTanunication systems and fire command station in buildings classified in occupancy group E 100 ft or more in height, and existing

office buildings 100 ft or more in height (LL 5, sec. 30).

4.2.7 Elevators

Section C26-1 800.8 was amended regarding an elevator in readiness in every building in occupancy

group E, 100 ft or more in height and in existing office buildings 100 ft or more in height (LL 5, sec. 31).

4.2.8 Reference Standards

In addition to amending existing building code requirements or enacting new code requirements,

LL 5/1973 also modified existing Reference Standards and added new Reference Standards as follows:

• RS 5-17, Standards for the Installation of Smoke Shafts (added LL 5, sec. 32).

• RS 5-18, Standards for the Pressurization of Stairs (added LL 5, sec. 33).

• RS 1 3 -

1

, Standards for the Installation of Air Conditioning and Ventilating Systems, National

Fire Protection Association (NFPA) No. 90-A, 1967, as modified, was amended to add a new

sec. 1006 regarding manual controls and smoke detection requirements in buildings in occupancy group E, 100 ft or more in height, where a system serves more than the floor on which the equipment is located (amended LL 5, sec. 34).

12 NISTNCSTAR 1-1G, WTC Investigation
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• RS 16, Plumbing and Gas Piping (amended LL 5, sec. 35).

• RS 17-1, Standpipe System Construction (amended LL 5, sec. 36, 37).

• RS 1 7-2, Standard for the Installation of Sprinkler Systems, NFPA No. 13 -1 966, as modified (amended LL 5, sec. 38).

• RS 17-3 A, Standards for the Installation of Class E Fire Alarm Signal Systems (new LL 5, sec. 39).

• RS 17-3B, Standards for the Installation of Modified Class E Fire Alann Signal Systems

(new LL 5, sec. 40).

• RS 18-1, USA Standard Safety Code for Elevators, Dumbwaiters, Escalators and Moving

Walks, including Supplement A 17- la -1967, as modified (amended LL 5, sec. 41, 42).

4.3 1975 - LOCAL LAW NO. 26, FIRE SAFETY IN OFFICE BUILDINGS

LL 26/1975 was approved "to amend the administrative code of the city of New York, in relation to fire safety requirements and controls in certain office buildings."

LL 26/1975 revised the smoke and heat venting compliance dates previously established by LL 5/1973, as follows:

• C26-504. 15(c) Smoke and heat venting - revised the completion date for compliance with the smoke and heat venting requirements to be within 4V2 years after February 7, 1973. The

completion date for existing buildings that were to be sprinklered throughout was established

as February 7, 1979 (LL 26, sec. 1).

Note that the compliance dates revised by LL 26/1975 were further modified by Local Law No. 86 for the year 1979 (see Sec. 4.8 of this report).

LL 26/1975 was approved by the Mayor on June 2, 1975, and was effective immediately.

4.4 1976 - LOCAL LAW NO. 55, INSPECTION OF SPRAYED-ON FIRE

PROTECTION OF STRUCTURAL MEMBERS

Local Law No. 55 for the year 1976 (LL 55/1976) was approved "to amend the administrative code of the

city of New York, in relation to the fire protection of structural members."

A new subdivision (f) was added to sec. C26-502.2 mandating that the installation of all required sprayed- on fire protection of structural members except those encased in concrete shall be subject to the controlled

inspection requirements of C26- 106.3 (LL 55, sec. 1).

LL 55/1976 was approved by the Mayor on November 1, 1976, and was effective immediately for new

installations, but was not retroactive for installations that were filed with the Department of Buildings

prior to November 1, 1976.

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4.5 1978 - LOCAL LAW NO. 33, FIRE WARDENS IN OFFICE BUILDINGS

Local Law No. 33 for the year 1978 (LL 33/1978) was approved "to amend the administrative code of the

city of New York, in relation to tenant's employees as fire wardens in certain office buildings."

LL 33/1978 consists of two sections that amend a provision added to the Fire Prevention Code by

LL 5/1973. The two sections pertain to fire safety plans and the designation and training of fire wardens

and deputy fire wardens by the fire safety directors.

Section 1 adds a new paragraph 6 to sec. CI 9- 161 .2(a) requiring the tenant or tenants on each floor to provide responsible and dependable employees for designation and training by the fire safety director as

fire wardens and deputy fire wardens to carry out their responsibilities as contained in the fire safety plan.

Section 2 amends C19-161. 2(a)(2)(a) requiring the fire safety director to designate and train the fire wardens and deputy fire wardens provided by the tenants on each floor.

LL 33/1978 was signed by the Mayor on October 6, 1978, and was effecfive immediately. Since the LL 5/73 requirements for fire safety plans and fire safety directors were applicable to existing office

buildings, the additional requirement for fire wardens and deputy fire wardens were also applicable to existing office buildings.

4.6 1978 - LOCAL LAW NO. 41, FIRE PROTECTION FOR PLACES OF

ASSEMBLY

After the tragic fire in the Blue Angel nightclub in midtown Manhattan in December 18, 1975, Local Law

No. 41 for the year 1978 (LL 41/1978) was approved "to amend the administrative code of the city of

New York, in relation to fire protection for places of assembly."

A place of assembly is defined in the BCNYC as "an enclosed room or space in which seventy-five or more persons gather for religious, recreational, educational, political or social purposes, or for the consumption of food or drink, or for similar group activities. . At the World Trade Center (WTC)

complex, several cafeterias throughout the buildings and restaurants such as the Windows on the World

on the 107th floor of WTC 1 are classified as occupancy group F-4 places of assembly.

Sections of the Fire Prevention Code and Building Code were amended by LL 41/1978 to require

emergency lighting, sprinklers, and fire alarm signal systems in certain areas of places of assembly.

LL 41/1978 included requirements for new places of assembly as well as retroactive provisions for existing places of assembly. The following code requii ements are applicable for all new places of

assembly and include retroactive provisions for such existing places of assembly:

• C26-80 1.18, Emergency lighting - All new and existing assembly spaces are required to be

provided with emergency lighting facilities sufficient to provide at least 5 foot candles of

illumination at the floor level. Such lighting shall be on circuits that are separate from the general lighting and power circuits, either taken off ahead of the main switch or connected to a separate emergency power source, and be arranged to operate automatically in the event of

failure of the normal lighting system. Compliance in existing buildings was to be completed

within a one year time period (amended LL 41 , sec. 1 1).

14 NISTNCSTAR 1-1 G, WTC Investigation
Evolution of Building Code Since 1968

• C26-802. 0(b)(7)(g) - Automatic sprinklers for stage areas in new and existing occupancy

group F- la places of assembly within 1 year of the effective date (added LL 41, sec. 12).

• C26-802. 3(b)(2) - Automatic sprinklers and fire alarni protection for stages, dressing rooms

and property rooms in new and existing occupancy group F-lb places of assembly providing

live entertainment within 1 year of effective date (added LL 41, sec. 13).

• C26-804. 1(a)(3) and C26-804.1(b) - Automatic sprinklers and fire alarni protection in new

and existing occupancy group F-4 places of assembly used as a cabaret' within 1 year of

effective date (added LL 41, sees. 14 and 15).

• C26-1703.1(j) - Automatic sprinkler systems in dressing rooms and property rooms used in conjunction with all new and existing places of assembly providing entertainment (amended

LL41, sec. 19).

• C26- 1 703 . 1 (s) - Automatic sprinkler systems in new and existing

- (1) occupancy group F-4 places of assembly used as cabarets.

- (2) stages within F-la, F-lb, F-3 or F-4 occupancies providing live entertainment (added

LL41, sec. 20).

• C26- 1 704. 1 (a)( 1 0) - Interior fire alann and signal systems in new and existing

- (a) Stages, dressing rooms and property rooms used in conjunction with all places of

assembly used as cabarets.

- (b) Places of assembly used as a cabaret (added LL 41, sec. 21).

LL 41/1978 was approved by the Mayor on December 13, 1978, and took effect 30 days after its enactment into law (January 12, 1979).

4.7 1979 - LOCAL LAW NO. 84, FIRE SAFETY PRESSURIZATION IN OFFICE

BUILDINGS

Local Law No. 84 for the year 1979 (LL 84/1979) was approved "to amend the administrative code of the

city of New York, in relation to fire safety pressurization requirements in certain office buildings."

To accommodate the requirement for stair pressurization as added by LL 5/1973, the opening paragraph

for shafts (C26-504.6) and the requirement for openings in stair enclosures (C26-604.8(j)) was editorially

revised (LL 86, sees. 1 and 2).

Cabaret - The term cabaret shall mean any room, place, or space in which any musical entertainment, singing, dancing or other

similar amusement is pennitted in connection with an eating and drinking establishment.

NISTNCSTAR 1-1 G, WTC Investigation 15
Chapter 4

Section 3 of LL 84/1979 amends RS 5-18, Standards for the Installation of Pressurization of Stairs.

LL 84/1979 was approved by the Mayor on December 13, 1979, and became effective immediately.

4.8 1979 - LOCAL LAW NO. 86, REVISED COMPLIANCE DATES FOR

LOCAL LAW NO. 5/1973

Local Law No. 86 for the year 1979 (LL 86/1979) was approved "to amend the administrative code of the

city of New York, in relation to the dates for compliance with the local law enacted for fire safety

requirements and controls in certain office buildings."

Various provisions of Local Law No. 5 for the year 1973 (i.e., compartmentation, pressurization, interior

fire alarm and communication, elevator in readiness) have been amended by LL 86/1979 to provide for new dates for compliance as follows:

• C26-504. 1 (c)(6) - Compartmentation - Existing office buildings 1 00 ft or more in height

shall comply as follows (amended LL 86, sec. 1):

- At least one-third of the total floor area of the building within 2 years of the effective date of LL 86/1979 (on or before December 13, 1981)

- At least two-thirds of the total floor area of the building on or before August 7, 1984

- Full compliance on or before February 7, 1988

• C26-504. 15(c) - Smoke and heat venting - Existing office buildings 100 ft or more in height that are required to provide smoke vents or stair pressurization shall complete

installation within 2 years and 9 months of the effective date of this local law (by

September 13, 1982), or

• C26-504. 1 5(c) - Sprinklers in lieu of smoke and heat venting - Existing buildings that are sprinklered throughout shall be exempt from the compartmentation and the smoke vent or

stair pressurization requirements under the following conditions (amended LL 86, sec. 2):

- At least one-third of the total floor area of the building, including but not limited to the entrance lobby, con idors and elevator landing areas, is sprinklered within 2 years of the

effective date of LL 86/1979 (on or before December 13, 1981),

- At least two-thirds of the total floor area of the building is sprinklered within 3 years (on

or before December 13, 1982),

- The building is sprinklered throughout within 4 years (on or before December 13, 1983).

• C26-1704.5(f)(12) - Class E fire alarm signal system - Existing office buildings

1 00 ft or more in height shall install a class E fire alarm signal system within 1 year and

9 months of the effective date of LL 86/1979 (on or before September 13, 1981), (amended

LL 86, sec. 3), or

16 NISTNCSTAR 1-1G. WTC Investigation
Evolution of Building Code Since 1968

• C26-1704.5(g)(10) - Modified Class E fire alarm system permitted in lieu of Class E fire alarm system - Existing office buildings 100 ft or more in height shall comply within 1 year and 9 months of the effective date of LL 86/1979 (on or before September 13, 1981),

(amended LL 86, sec. 4),

• C26-1 704.8(c) - Communication system and fire command station - Existing office buildings 100 ft or more in height were required to install a one-way and two-way voice

communication system and fire command station within 1 year and 9 months of the effective date of LL 86/1979 (on or before September 13, 1981), (amended LL 86, sec. 5),

• C26- 1800.8(c) - Elevator in readiness - Existing office buildings 100 ft or more in height were required to provide elevators for immediate use by the fire department within 1 year and

9 months of the effective date of LL 86/1979 (on or before September 13, 1981), (amended

LL 86, sec. 6).

LL 86/1979 was approved by the Mayor on December 13, 1979, and became effective immediately.

4.9 1984 - LOCAL LAW NO. 16, FIRE SAFETY REQUIREMENTS IN CERTAIN

BUILDINGS

Local Law No. 16 for the year 1984 (LL 16/1984) was approved "To amend the administrative code of

the city of New York, in relation to fire safety requirements in certain buildings and repealing certain provisions thereof relating thereto." Not since Local Law No. 5/1973 was there as extensive a local law

amending fire protection and life safety provisions of the BCNYC. LL 16/1984 consists of 40 pages with

100 sections of code amended.

Sections of the Fire Prevention Code and the Building Code were amended by LL 16/1984. This local law provided additional fire protection and life safety requirements for new buildings in most occupancy

groups and retroactive provisions for existing buildings in most occupancy groups, but primarily

buildings in occupancy group J-1 (hotels).

The major highlights of LL 1 6/1 984 are summarized in the following sections.

4.9.1 Fire Safety Requirements

Section CI 9-1 6 1.3 of the New York City Fire Prevention Code was added requiring all new and existing

buildings, when required by the BCNYC, to be provided with sprinklers, exit lighting, exit signs, stair and

elevator signs, signs in sleeping rooms, fire alanns, communication systems, and fire command stations (LL 16/1984, sec. 3).

NISTNCSTAR 1-1 G. WTC Investigation 17
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4.9.2 Alterations to Existing Buildings

Section C26- 103.0 of the BCNYC was amended regarding alterations of existing buildings. Three new

subdivisions were added requiring the following provisions to apply to alterations of existing buildings,

regardless of magnitude or cost (LL 16/1984, sec. 8):

1. Interior finish work, as provided in sec. C26-504. 10

2. Finish flooring and floor covering, as provided in C26-504. 13

3. The installation or replacement of elevators, as provided in article 18

4.9.3 Fire Protection Plan

A new sub-article 124.0 (sees. C26- 124.1 through C26- 124.4) was added requiring a fire protection plan"

for certain new buildings, including all high-rise buildings. The requirement for fire protection plans was

also apphcable retroactively to the construction of buildings in progress and not yet completed on the

effective date (March 27, 1984) and to alterations to an existing building or building section if the cost of

the alteration exceeded one million dollars or involved a change of use. Section C26- 124.2 outlines the scope of items to be included in the fire protection plan (LL 16/1984, sec. 12).

4.9.4 Special Filing Requirements

A new sub-article 125.0 (sec. C26-125.1) was added requiring the owners of all existing buildings, which

are required to comply with certain provisions of LL 16/1984 to file a report with the New York City

Department of Buildings on or before April 1, 1987, certifying the installation of the required fire protection systems (LL 16/1984, sec. 12). The provisions include:

• C26-504. 1 6(a) - Elevator vestibules

• C26-605. 1 and C26-605.2(b) - Exit lighfing

• C26-606.2(b) - Exit signs

• C26-609.3 - Signs in sleeping rooms

• C26-1 300.9 - Ventilation in existing J-1 buildings

• C26- 1700.7(b) - Sprinklers, fire alann systems, fire command and communication systems

(Note: subdivision (b) was not added until LL 16/1987. Subdivision (a) may have been

intended)

" Fire Protection Plan -

structure.

18

A report containing a narrative description of the life and fire safety systems and evacuation system for a

NIST NCSTAR 1-1G, WTC Investigation
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• C26-1 800.8(c)(2) - Elevators in readiness

• C26- 1 80 1 .4 - Locks on elevator hoistway doors

• C26-1801.5 - Firemen's service operation for elevators

4.9.5 Definitions

LL 16/1984 added several new definitions to sub-article 201.0 of the BCNYC, including the definition of

atrium, elevator vestibule, existing building, existing high-rise building, fire protection plan, fire safety

plan, high rise, low rise, mall, public areas and smoke barrier (LL 16/1984, sees. 13 through 21).

Of particular importance was the addition of the term high rise buildings defined as a structure 75 ft or more in height. All new buildings after the effective date of LL 16/1984 (March 27, 1984) that are 75 ft or more in height are classified as high-rise buildings.

The term existing high rise building was also added and defined to include only high-rise structures:

(1) which on April 1, 1984, is complete or under construction, or (2) for which an application for approval

of plans has been filed with the department prior to October 1, 1984, and construction commenced prior

to April 1, 1986.

WTC 1 and WTC 2 were considered existing high-rise buildings for the purposes of complying with

LL 16/1984 and must comply with the provisions for existing high-rise buildings.

WTC 7 was not complete on April 4, 1984; however, it may be considered an existing high-rise building

if it complied with condition number 2.

4.9.6 Height and Area Limitations

Tables 4-1 and 4—2 of the Building Code were amended to reflect modifications to height and area

limitations for unsprinklered and sprinklered buildings and spaces, respectively (LL 16/1984, sec. 23).

4.9.7 Compartmentation

Section C26-504.1(c), as added by LL 5/1973, was amended to omit the requirement for compartmentation in new buildings in occupancy group E, 100 ft or more in height, since such buildings

will be required to be sprinklered by requirements added by sec. 64 of LL 16/1984. Therefore,

compartmentation requirements will only be applicable in existing office buildings 100 ft or more in height.

4.9.8 Floor Coverings

Section 26-504.13 was amended by adding a new subdivision (d) for requirements for floor coverings in new construction and alterations of existing buildings (LL 16/1984, sec. 32).

NISTNCSTAR 1-1 G. WTC Investigation 19
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4.9.9 Smoke Protection for Elevators and Escalators

Section 26-504. 16(a) was added requiring elevator vestibules for all passenger elevators in existing

buildings classified in occupancy group J-1 (hotels), at every floor above the main entrance floor, with

exceptions where automatic sprinklers and/or smoke detection systems are provided (LL 16/1984,

sec. 33). "

Section C26-504. 16(b) was added requiring fire protection for escalators in new and existing buildings

classified in occupancy group J-1 (LL 16/1984, sec. 33).

4.9.10 Means of Egress

Several sections regarding means of egress were amended by LL 16/1984. Most new and amended

requirements only pertain to new buildings and alterations to existing buildings. Few sections have been

amended requiring compliance retroactively in existing buildings.

An example of a requirement that was applicable to new buildings and alterations of existing buildings is

sec. C26-602.3, which was amended to require exits from a floor of a building to be placed as remote as practicable. The minimum distance between exit door openings in all buildings, except occupancy groups

G and J-2, shall be 30 ft or be one-third the maximum travel distance of the floor, whichever is greater

(LL 16/1984, sec. 35).

Retroactive requirements for existing buildings include the following sections:

• C26-605. 1 (e) - amended to require new and existing buildings containing an F-4 (eating and

drinking) place of assembly with an occupant load of 300 or more persons to install emergency lighting in each vertical exit serving the floor on which the place of assembly is located so as to provide a continuously lighted passage to the exterior of the building. The

lighting is required to be connected to an emergency power source or to storage battery

equipment meeting the requirements of the bureau of electrical control. Owners of existing

buildings were required to install the emergency lighting on or before April 1, 1987

(LL 16/1984, sec. 44).

• C26-605.2 - amended to require all new buildings, existing high-rise buildings in occupancy

group C, D or H, and existing buildings in occupancy group E, G or J-1 to connect exit lighting to an emergency power source or storage battery equipment on or before April 1

,

1987 (LL 16/1984, sec. 45).

• C26-606.2 - amended to require all new buildings, existing high-rise buildings in occupancy

group C, D or H, and existing buildings in occupancy group E, G or J-1 to connect exit and/or

directional exit signs to an emergency power source or storage battery equipment on or before April 1, 1987 (LL 16/1984, sec. 46).

• C26-608. 1 and C26-608.7 - amended to require all existing buildings which have at least one

elevator to provide stair and elevator signs on or before October 1, 1985 (LL 16/1984, sec. 48

and 49).

20 NISTNCSTAR 1-1G, WTC Investigation
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• Sub-article 609.0 Signs in Sleeping Rooms (sees. C26-609.] through C26-609.3) - added to require new and existing buildings in occupancy group J-1 to post and maintain a location

sign and diagram on the inside of every door opening onto a public corridor on or before

April 1, 1987 (LL 16/1984, sec. 50).

4.9.11 Emergency Power System

Sub-article 610.0 Emergency Power (sees. C26-610.1 through C26-610.3) was added to require owners of

certain buildings, including high-rise buildings and building sections classified in occupancy group C, E,

G, and H, to provide an emergency power system. This requirement was applicable to new buildings and

certain alterations to existing buildings, but not retroactively applicable to existing buildings (LL 16/1984,

sec. 50).

4.9.12 Atriums

Sub-Article 720.0 (sees. C26-720.1 through C26-720.9) was added to provide requirements for the construction, alteration and use of atriums (LL 16/1984, sec. 52).

4.9.13 Malls

Sub-Article 721.0 (sec. C26-721.1 through C26-721.7) was added to provide requirements for the

construction, alteration and use of malls (LL 16/1984, sec. 52).

4.9.14 Smoke Control Requirements

Section C26- 1300.8(a) was added to require owners of new buildings in most occupancy groups,

including group E, to have separate ventilation systems supplying different occupancies, corridors, means

of egress and other spaces (LL 16/1984, sec. 53).

Section C26- 1300.8(b) was added to require buildings in most occupancy groups, including group E, to provide a mechanical system with sufficient capacity to exhaust six air changes per hour or 1 cfrn/ft', whichever is greater, from the largest floor in the building. Such system may be either by dedicated fan

equipment or the building ventilation system arranged to shut down automatically with manual override

capability to exhaust one floor at a time through a roof or an approved location on an exterior wall

(LL 16/1984, sec. 53).

Section C26-1 300.9, Ventilation in Existing J-1 Buildings, was added to require owners of existing

buildings in occupancy group J-1, either 75 ft or more in height or containing 30 or more sleeping rooms,

to separate corridor ventilation from sleeping rooms and to provide manual smoke purging for all corridors and other public areas not provided with natural ventilation (LL 16/1984, sec. 53).

NISTNCSTAR 1-1G, WTC Investigation 21
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4.9.15 Automatic Sprinklers

Several sections were amended by LL 16/1984 requiring automatic sprinklers in various occupancy

groups. New requirements for sprinklers were added for new high-rise buildings and spaces in occupancy

groups E, F, G, and J-1 and certain low rise buildings in occupancy groups E and J-1. Sprinklers are also required in certain existing buildings and spaces in occupancy groups C, F, and J-1.

The requirements for buildings in occupancy group E are as follows:

• Section C26-1703.1(z) was added to require automatic sprinklers in new high-rise buildings

classified in occupancy group E and low-rise buildings classified in occupancy group E with

a total gross floor area of 100,000 ft' or more.

• Section C26-1 703.9(h) was amended to permit standpipe risers to be used to supply water to sprinklers in high-rise buildings classified in occupancy groups E, G, H, and J and in existing

office buildings, 100 ft or more in height.

4.9.16 Fire Alarm and Communication Systems

Section C26- 1704.5 was amended by adding two new subdivisions (i) and (j) requiring fire alarm and

communication systems and command stations for new high-rise buildings in occupancy groups C

(mercantile), new and existing high-rise buildings in occupancy group J-1 (hotels) and new and existing

low rise buildings in occupancy group J-1 with 30 or more sleeping rooms (LL 16/1984, sec. 75).

Section C26-1 704.6(a)(2) was amended to require all fire alarm manual stations installed or relocated

after April 1, 1984, to be installed so that the handle is approximately 4 ft from the floor (LL 16/1984,

sec. 76).

Section C26-1704.8 as added by LL 5/1973 was amended to modify the requirement for communication

systems and fire command stations in buildings in occupancy group E. Local Law 5/1973 initially

required such systems in new and existing buildings in occupancy group E (offices), 100 ft or more in height. Local Law 16/1984 amended this section to require communication systems and fire command

stations in new buildings in occupancy group E, 75 ft or more in height, or if less than 75 ft in height,

buildings with a total gross area of 200,000 ft" or more. The requirement for existing office buildings

remained as 100 ft or more in height (LL 16/1984, sec. 77).

Section C26- 1705.2 as added by LL 62/1981 was amended by adding a new subdivision (b) requiring

approved and operational smoke detecting devices to be installed in mechanical rooms, electrical switch

gear rooms and electric and telephone closets over 75 ft' in gross floor area in all buildings in all occupancy groups (LL 16/1984, sec. 78).

4.9.17 Elevators

Section C26- 1800.8, as amended by LL 5/1973 and LL 86/1979, was amended to reduce the height of new buildings required to comply with the requirements of elevator in readiness from 100 ft to 75 ft, consistent with the new definition of high-rise buildings. This section was also amended to expand on the types of buildings required to comply with this section to include: high-rise buildings classified in

22 NISTNCSTAR 1-1 G, WTC Investigation
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occupancy groups A, B, C, D, E, F, G, and H, buildings classified in occupancy group E with a gross area of 200,000 ft" or more, buildings classified in occupancy groups J-1 and J-2, existing high-rise buildings

classified in occupancy groups C, F, G, and H, existing buildings classified in occupancy group J-1 and

existing office buildings 100 ft or more in height (LL 16/1984, sec. 79).

Section C26-1801.4 was added requiring owners of existing high-rise buildings to remove any switch,

lock or other device on any elevator car or elevator hoistway door that prevents the opening of such doors

by anyone not having a key. Existing high-rise buildings were required to comply with this section on or before April 1, 1987 (LL 16/1984, sec. 80).

Section C26-1801.5 was added to require firemen service operation (as defined in ASME A 17.1) in existing elevators in high-rise buildings in occupancy group C and all buildings classified in occupancy

group F, G, H, or J-1 on or before April 1, 1987 (LL 16/1984, sec. 80).

4.9.18 Reference Standards

In addition to amending existing building code requirements or enacting new code requirements,

LL 16/1984 also modified existing Reference Standards and added new Reference Standards as follows:

• RS 5-19, Standard Method of Fire Tests of Through-Penetration Fire Stops,

ASTM International (ASTM) E 814- 1981 (added LL 16/1984, sec. 85).

• RS 5-20, Standard for the Flammability of Carpets (added LL 1 6/1 984, sec. 85).

- Methane Pill Test, DOC FF 1 - 1 970

- Standard Test Method for Critical Radiant Flux of Floor Covering Systems Using a Radiant Heat Source, ASTM E 648-1978

- Standard Test Method for Specific Optical Density of Smoke Generated by Solid

Materials, ASTME662-1979

• RS 13-1, Standard for the Installation of Air Conditioning and Ventilating Systems,

NFPA 90A - 1981, as modified (repealed and re-enacted by LL 16/1984, sec. 87).

• RS 17-3, Standards for the Installation of Fire, Sprinkler, Standpipe, Smoke Detection. . .and

other Alarai and Extinguishing Systems (amended LL 16/1984, sees. 88 through 92).

• RS 17-3 A, Standards for the Installation of Class E Fire Alarni Signal Systems (amended

LL 16/1984, sees. 93 through 96).

• RS 17-3C, Standard for the Installation of Fire Alarm Signal Systems and Communication

Systems for High-Rise Buildings in Occupancy Group C - Mercantile, and J-1 - Residential

(Transient), and Buildings in Occupancy Group J-1 - Residential Containing 30 or More

Sleeping Rooms (added LL 16/1984, sec. 97).

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• RS 17-3D, Standard for the Installation of Fire Alarm Signal Systems and Communication

Systems for Existing Buildings in Either Group J-1 - Residential (Transient) 75 ft or More in Height or with 30 or More Sleeping Rooms (added LL 16/1984, sec. 97).

• RS 18-1, Rule 21 1.3a (l)(b) (repealed and re-enacted LL 16/1984, sec. 98).

LL 16/1984 was approved by the Mayor on March 27, 1984, and took effect immediately, except as otherwise specifically provided. Note that some of the provisions of LL 16/1984 were further amended

by Local Law No. 16 for the year 1987 (LL 16/1987).

4.10 1985 - LAWS OF NEW YORK STATE, RENUMBERING OF NEW YORK

CITY ADMINISTRATIVE CODE

The New York City Administrative Code was renumbered and changed by chapter 907 of the New York

State Laws of 1985 and chapter 839 of the New York State Laws of 1986, effective September 1, 1986.

The renumbering of the Administrative Code included the Building Code and the Fire Prevention Code of

the City of New York.

The Building Code was originally part of Title of Chapter 26 (C26-) of the Administrative Code.

After 1985, the General Provisions of the Department of Buildings were organized under Chapter 1 of

Title 26 - Housing and Buildings and the Building Code is Chapter 1 of Title 27 - Construction and

Maintenance. The forniat of the Department of Buildings provisions and the Building Code under the renumbered Administrative Code is as follows:

• Title 26 - Housing and Buildings

- Chapter 1 - Department of Buildings

- Subchapter 1 - General Provisions

- Subchapter 2 - Licenses

- Subchapter 3 - Building Construction

• Title 27 - Construction and Maintenance

- Chapter 1 - Building Code

- Subchapters 1 through 19 .

- Appendix - Building Code Reference Standards

Subsequent publications of the BCNYC include the new section number with the former Building Code

sections enclosed by parentheses. Conversion or Distribution Tables are also provided in the BCNYC for convenience of converting from former code sections to new code sections and vice-versa.

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The Fire Prevention Code was originally part of Chapter 19 (CI 9-) of the Administrative Code. After

1985, the Fire Prevention Code was organized under Chapter 4 of Title 27 of the Administrative Code as follows:

• Title 27 - Construction and Maintenance

- Chapter 4 - Fire Prevention Code

- Subchapters 1 through 29

4.11 1987 - LOCAL LAW NO. 16, FIRE ALARM SYSTEMS AND REFERENCE

STANDARDS

Local Law No. 16 for the year 1987 (LL 16/1987) was approved "To amend the administrative code of

the city of New York, in relation to fire alarm systems and to repeal reference standards RS 17-3C and

RS 17-3D of the appendix thereto." LL 16/1987 made several modifications to the fire alarm and signal

system requirements that were added to the BCNYC by LL 5/1973 and LL 16/1984.

The following is a summary of the sections amended or added by LL 16/1987:

• 27-929 (fonnerly C26- 1700.7) Retroactive Requirements - amended by adding a new

subdivision (b) to revise the dates for compliance with the retroactive provisions of

LL 16/1984 for the installation of a fire alarm and signal system in occupancy group J-1 (hotels). The date for completed installation was extended from April 1, 1987 to December 31, 1987 (LL 16/1987, sec. 1).

• 27-97 1(g) (formerly C26-1 704.4(g)) Class E system and 27-97 1(h) (fonnerly C26- 1704.4(h))

Modified Class E system - amended to include the provision of sec. 27-973(a)(2) requiring

fire alann stations installed or relocated after April 1, 1984, to be installed so that the handle

is approximately 4 ft from the floor (LL 16/1987, sec. 2).

• 27-971 (fonnerly C26-1704) was amended by adding four new subdivisions i, j, k, and 1 as follows (LL 16/1987, sec. 3):

- (i) Class C fire alann and communicafion system - for new mercantile (retail) buildings

in occupancy group C, 75 ft or more in height.

- (j) Class J fire alann and communication system - for new buildings in occupancy group

J-1 (hotels), 75 ft or more in height or containing 30 or more sleeping rooms.

- (k) Modified class J fire alann and communication system - for existing buildings in occupancy group J-1 (hotels) 75 ft or more in height.

- (1) Modified class J-1 fire alarm and communication system - for existing buildings in occupancy group J-1 (hotels) less than 75 ft in height or containing 30 or more sleeping rooms.

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• 27-972(i) (fonnerly C26-1704.5(i) as added by LL 16/1984) was amended to separate the requirements for high-rise buildings classified in occupancy group C from the requirements

for buildings classified in occupancy group J-1 by proving two separate paragraphs (1) and

(2) respectively and provide the following modifications (LL 16/1987, sec. 4):

- Paragraph ( 1 ) - the Reference Standard for Class C fire alann systems was changed to RS 17-3A (fromRS 17-3C).

- Paragraph (2) - the Reference Standard for Class J-1 fire alarm systems was changed to RS 17-3A (from RS 17-3C). Also, new alternative methods for two-way voice

communication systems in lieu of fire warden stations were added.

• 27-972(j) (formerly C26-1704.5(i) as added by LL 16/1984) for existing buildings classified

in occupancy group J-1, was amended to include two new paragraphs as follows

(LL 16/1987, sec. 4):

- Paragraph ( 1 ) for existing buildings in occupancy group J- 1

, 75 ft or more in height

provides an exception for "residential hotels" as defined in the Building Department

Rules of the City of New York. The Reference Standard for modified Class J fire alarm

systems was changed to RS 17-3B (from RS 17-3D). Also, two new alternative methods

for two-way voice communication systems in lieu of fire warden stations were added.

- Paragraph (2) was added to provide a new fire alarm system classification, a modified

Class J-1 fire alarm and communication system, for existing buildings in occupancy

group J-1, less than 75 ft in height and containing thiity or more sleeping rooms. The

requirements for a fire command station, public address system and central station monitoring of the fire alarm system are also provided.

• 27-972(k) (formerly C26-1704.5(k)) was added requiring buildings classified in occupancy

group C (mercantile), 75 ft or more in height to be provided with a Class C fire alann and

communications system, including the applicable criteria (LL 16/1987, sec. 5).

• 27-972(1) (fonnerly C26-1 704.5(1)) was added requiring buildings in occupancy group J-1 (hotels), 75 ft or more in height or containing 30 or more sleeping rooms, to be provided with

a Class J fire alann and communication system, including the applicable criteria (LL 16/1987,

sec. 5).

• 27-972(m) (fonnerly C26-1704.5(m)) was added requiring existing buildings in occupancy

group J-1 (hotels), 75 ft or more in height or containing 30 or more sleeping rooms, to be

provided with a modified Class J fire alann and communication system, including the applicable criteria (LL 16/1987, sec. 5).

• RS 17-3A (as added by LL 5/1973) - the title was amended to read "Standards for the

Installation of Class E, Class C and Class J Fire Alann Signal Systems" (LL 16/1987, sec. 6).

26 NISTNCSTAR 1-1G, WTC Investigation
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• RS 17-3B (as added by LL 5/1973) - the title was amended to read "Standards for the

Installation of Modified Class E, and Modified Class J Fire Alarm Signal Systems"

(LL 16/1987, sec. 7).

• RS 17-3C (as added by LL 16/1984) was repealed. The installation standards for fire alann signal systems and communication systems in high-rise buildings in occupancy

group C - Mercantile, and J-1 - Residential (transient), and buildings in occupancy

group J-1 - Residential containing 30 or more sleeping rooms is now RS 17-3A (LL 16/1987,

sec. 8).

• RS 17-3D (as added by LL 16/1984) was repealed. The installation standard for the

installation of fire alann signal systems and communication systems for existing buildings in either occupancy group J-1 - Residential (transient) 75 ft or more in height or with 30 or more sleeping rooms is now RS 17-3B (LL 16/1987, sec. 8).

LL 16/1987 was approved by the Mayor on April 20, 1987, and was effective immediately.

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Chapter 5

Building Code Reference Standards

Since 1968, the Reference Standards (RS) of the Building Code of the City of New York have been

updated by Local Laws passed by the City Council, Building Code Rules approved by the New York. City

Board of Standards and Appeals (BSA) until 1991, and by the authority of the Building Commissioner,

after 1991. A New York City Reference Standard may adopt a standard developed and published by an

outside standards developer (such as the National Fire Protection Association [NFPA]) in whole or in

part, and may choose to modify parts to meet local conditions or practices. When such modifications are adopted, the New York City Reference Standard differs from the published standard. The following is a summary of the applicable fire protection or life safety reference standards and effective dates.

5.1 RS 5-2, ASTM E 119

RS 5-2, Standard Methods of Fire Tests of Building Construction Materials, ASTM International (ASTM)

E119-1961

• Added by Local Law No. 76/1968 (LL 76/1968), effective December 6, 1968

• Amended by BSA 2 1 7-72-BCR, effective April 25, 1 972

• Amended by BSA 1343-88-BCR, effective December 20, 1988

5.2 RS 5-5, ASTM E 84

RS 5-5, Standard Method of Test for Surface Burning Characteristics of Building Materials,

ASTM E 84 - 1961

• Added by LL 76/1968, effective December 6, 1968

• Amended by BSA 2 1 8-72-BCR, effective April 25, 1 972

• Amended by BSA 308-8 1-BCR, effective June 16, 1981

• Amended by BSA 1 343-88-BCR, effective December 20. 1 988

5.3 RS 5-8, NFPA 80

RS 5-8, Installation of Fire Doors and Windows, NFPA 80 - 1967

• Added by LL 76/1968. effective December 6, 1968

• Amended BSA 71-79-BCR, effective February 20, 1979

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Chapter 5

• Amended by BSA 308-8 1-BCR, effective June 16, 1981

• Amended by BSA 1 343-88-BCR, effective December 20, 1 988

5.4 RS 13-1, NFPA90A

RS 13-1, Standard for the Installation of Air Conditioning and Ventilating Systems, NFPA 90A - 1967,

as modified

• AddedbyLL 76/1968, effective December 6, 1968

• AmendedbyLL 16/1984, effective March 27, 1984

• Amended by BSA 1 7-87-BCR, effective February 1 0, 1 987

• Repealed and added by Building Department, effective May 4, 2002

5.5 RS 17-1, STANDPIPE CONSTRUCTION

RS 17-1, Standpipe Construction

• AddedbyLL 76/1968, effective December 6, 1968

'

• Amended by BSA 177-72-BCR, effective April 18, 1972

• Amended by LL 5/1973, effective Januaiy 1 8, 1 973

• Amended by BSA 1014-0-BCR, effective November 25, 1980

• Amended by BSA 384-82-BCR

• Amended by BSA 3 1 0-90-BCR, effective January 22, 1 99

• Amended by Building Department, effective July 24, 1 996

5.6 RS 17-2, NFPA 13

RS 17-2, Standard for the Installation of Sprinkler Systems NFPA 13 - 1966, as modified

• AddedbyLL 76/1968, effective December 6, 1968

• Amended by BSA 633-83-BCR, effective September 13, 1983

• Amended by BSA 3 1 0-90-BCR, effective January 22, 1 99

• Amended by Building Department, effective April 3, 2003

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5.7 RS 17-3, FIRE ALARM AND EXTINGUISHING SYSTEMS

RS 17-3, Standards for the Installation of Fire, Sprinkler, Standpipc, Smoke Detection... and other Alarm

and Extinguishing Systems

• Added by LL 76/1 968, effective December 6, 1 968

• Amended by BSA 149-75-BCR, effective May 6, 1 975

• Amended by BSA 5 1 5-75-BCR, effective December 2, 1 975

• Amended by LL 16/1984, effective March 27, 1984

• Amended by Building Department, effective April 3, 2003

5.8 RS 17-3A, CLASS E FIRE ALARM SYSTEMS

RS 17-3 A, Standards for the Installation of Class E, Class C, and Class J Fire Alarm Signal Systems

• Added by LL 5/1973, effective January 18, 1973

• Amended by LL 16/1984, effective March 27, 1984

• Amended by Building Department, effective April 3, 2003

5.9 RS 17-3B, MODIFIED CLASS E FIRE ALARM SYSTEMS

RS 17-3B, Standards for the Installation of Modified Class E, and Modified Class J, Fire Alarm Signal

Systems

• Added by LL 5/1973

• Amended by BSA 49-74-BCR, effective March 12, 1974 ^

• Amended by LL 16/1984, effective March 27, 1984

• Amended by LL 16/1987, effective April 20, 1987

• Amended by Building Department, effective April 3, 2003

NISTNCSTAR 1-1 G, WTC Investigation 31
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5.10 RS 17-5, NFPA72

RS 17-5, Proprietary and Auxiliary Protective Signaling Systems, NFPA 72 - 1967

• AddedbyLL 76/1968, effective December 6, 1968

• Amended by BSA 3 1 0-90-BCR, effective January 22, 1 99

• Repealed and added by Building Department, effective Januaiy 9, 2002

5.11 RS 18-1, AMERICAN NATIONAL STANDARDS INSTITUTE A17.1

RS 18-1, USA Standard Safety Code for Elevators, Dumbwaiters, Escalators, and Moving Walks,

USASI 17.1 - 1965, including Supplement A 17. la- 1967, as modified

• Added by LL 76/1 968, effective December 6, 1968

• AmendedbyBSA 385-82-BCR, effective August 10, 1982

• Amended by LL 16/1984, effective March 27, 1984

• Amended by BSA 678-85-BCR, effective October 1 , 1 985

• Amended by BSA 11-9 1-BCR, effective March 12, 1991

• Amended by Building Department

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References

City Publishing Center Department of General Services. 1968. The City ofNew York Building Code.

New York, NY, December 6.

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