DOB Findings and Recommendations for WTC, Feb 2003

NYC 9/11 Public Portal Document

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Table of Contents

1 Executive Summary........ 10 1'1 Scope and Participation... 10 1.2 . Sources and Deliberation 10 1.3 Recommendations 11

2 Introduction 12 2.1 Task Force Mission and Scope........... 12 I 2.2 Task Force Structure and Participation 13 2.2.1 Executive Committee.............. 13 I 2.2.2 Working Groups........... ........... 14 2.2.3 Public Forum.................... ....... 14 2.3 Methodology....... ........................... 14 2.4 Organization of this Report.................. 15

3 Sources of Information 16 3.1 FEMA Building Performance Study Report 16 I I 3.2 Public Forum........................ ...................... 17 3.3 Other Sources of Information............ ......... 17

4 Findings and Recommendations 18 4.1 Structural Strength.................................................................... 18 I. 4.1.1 Progressive Collapse............................ ............... 18 4.1.2 Use of Lightweight Structural Members...... ................ 18 ) 4.1.3 Hardening of Stairwell and Elevator Shaft Enclosures 19 I 4.2 Evacuation and Egress...................... ...................................... 19 4.2.1 Capacity and Location of Stairwells................ ............ 20 4.2.2 Clarity of Egress Pathway.................. ................... 20 4.2.3 Planning and Training for Evacuation......................... 21 4.2.4 Auxiliary Systems............................ ........................... 21 4.2.5 Evacuation of People with Special Needs.................. 22 4.3 Fire Protection........................................................................... 22 4.3.1 Passive and Active Fire Protection Systems.............. 22 1 4.3.2 Enhanced Emergency Communication........... ........... 23 4.3.3 Fire Safety Personnel and Operations....................... 24 4.4 Mechanical Systems................................................................. ...... 24 4.4.1 Fuel Oil Storage and Transfer/Distribution Piping...... ...... 24 4.4.2 Elevators....... .............................................................. ...... 26 4.4.3 Heating, Ventilation and Air Conditioning (HVAC)..... 26 4.5 DOB Operations......... ............................................................. .... 27 4.5.1 Utilize Regularly Updated Model Code....................... ...... 27 4.5.2 Compliance with NYC Building Code.......................... ;......27 Page 8 WTC Building Code Task Force February 2003 Findings and Recommendations

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