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|
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</div>
|
|||
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|
</div>
|
|||
|
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</div>
|
|||
|
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</section>
|
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|
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|
|||
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|
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|
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|
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<div data-elastic-exclude>
|
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|
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|
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|
|
<div class="nist-print-header" style="display:none;">
|
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|
|
<p class="nist-print-header__url">https://www.nist.gov/blogs/taking-measure/20-years-later-nists-world-trade-center-investigation-and-its-legacy</p>
|
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|
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<img class="nist-print-header__logo" width="289" height="38" src="/libraries/nist-component-library/dist/img/logo/nist_logo_sidestack.svg" alt="National Institute of Standards and Technology" />
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|
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|
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|
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<div class="usa-overlay"></div>
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<header class="usa-header nist-header--www nist-header--minimal" role="banner">
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<a href="/" title="National Institute of Standards and Technology" aria-label="Home">
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<img src="/libraries/nist-component-library/dist/img/logo/logo.svg" alt="National Institute of Standards and Technology" width="300px" height="80px" />
|
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</a>
|
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|
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<div class="usa-header__right grid-row flex-auto">
|
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<div class="grid-col-fill nist-header__search-group">
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<form class="usa-search usa-search--small"
|
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accept-charset="UTF-8"
|
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action="/search"
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id="search_form"
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method="get">
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<div role="search">
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<label class="usa-sr-only" for="search-form">Search NIST</label>
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<input class="usa-input" id="search-form" type="search" name="s" placeholder="Search NIST" required="" maxlength="128">
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<button class="usa-button" type="submit"><img src="/libraries/nist-component-library/dist/img/usa-icons-bg/search--white.svg" class="usa-search__submit-icon" alt="Search"></button>
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<div class="grid-col-auto padding-left-1">
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<button class="usa-menu-btn">Menu</button>
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<a href="/nanotechnology" class="usa-nav__link">Nanotechnology</a>
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<a href="/neutron-research" class="usa-nav__link">Neutron research</a>
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<a href="/physics" class="usa-nav__link">Physics</a>
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<a href="/public-safety" class="usa-nav__link">Public safety</a>
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<li class="usa-nav__submenu-item">
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<a href="/quantum-information-science" class="usa-nav__link">Quantum information science</a>
|
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<a href="/resilience" class="usa-nav__link">Resilience</a>
|
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<a href="/standards" class="usa-nav__link">Standards</a>
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<a href="/transportation" class="usa-nav__link">Transportation</a>
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</ul>
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</div>
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</div>
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<button class="usa-accordion__button usa-nav__link" aria-expanded="false" aria-controls="primary_menu-3"><span>Labs & Major Programs</span></button>
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<div class="grid-row">
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|
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<li class="usa-nav__submenu-item">
|
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|
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<a href="/adlp" class="usa-nav__link">Assoc Director of Laboratory Programs</a>
|
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|
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</li>
|
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|
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<li class="usa-nav__submenu-item">
|
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|
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<a href="/laboratories" class="usa-nav__link">Laboratories</a>
|
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<ul class="usa-nav__submenu-list">
|
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<li>
|
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|
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<a href="/ctl" class="usa-nav__link">Communications Technology Laboratory</a>
|
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|
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</li>
|
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|
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<li>
|
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|
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<a href="/el" class="usa-nav__link">Engineering Laboratory</a>
|
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|
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</li>
|
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|
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<li>
|
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|
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<a href="/itl" class="usa-nav__link">Information Technology Laboratory</a>
|
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</li>
|
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<li>
|
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|
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<a href="/mml" class="usa-nav__link">Material Measurement Laboratory</a>
|
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</li>
|
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<li>
|
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|
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<a href="/pml" class="usa-nav__link">Physical Measurement Laboratory</a>
|
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|
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</li>
|
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|
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</ul>
|
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|
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</ul></div><div class="column-break tablet:grid-col-fill"><ul class="usa-nav__submenu-list">
|
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<a href="/user-facilities" class="usa-nav__link">User Facilities</a>
|
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<ul class="usa-nav__submenu-list">
|
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<li>
|
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|
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<a href="/ncnr" class="usa-nav__link">NIST Center for Neutron Research</a>
|
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|
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|
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|
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<li>
|
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|
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<a href="/cnst" class="usa-nav__link">CNST NanoFab</a>
|
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|
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|
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|
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</ul>
|
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|
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|
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|
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<a href="/labs-major-programs/research-test-beds" class="usa-nav__link">Research Test Beds</a>
|
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|
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|
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|
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|
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|
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<a href="/laboratories/projects-programs" class="usa-nav__link">Research Projects</a>
|
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|
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|
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|
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<a href="/laboratories/tools-instruments" class="usa-nav__link">Tools & Instruments</a>
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<a href="/major-programs" class="usa-nav__link">Major Programs</a>
|
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|
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<li>
|
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<a href="/baldrige" class="usa-nav__link">Baldrige Performance Excellence Program</a>
|
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|
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|
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|
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<li>
|
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|
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<a href="/chips" class="usa-nav__link">CHIPS for America Initiative</a>
|
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|
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|
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|
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<li>
|
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|
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<a href="/mep" class="usa-nav__link">Manufacturing Extension Partnership (MEP)</a>
|
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|
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</li>
|
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|
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<li>
|
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|
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<a href="/oam" class="usa-nav__link">Office of Advanced Manufacturing</a>
|
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|
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|
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<li>
|
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|
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<a href="/spo" class="usa-nav__link">Special Programs Office</a>
|
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|
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|
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<li>
|
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|
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<a href="/tpo" class="usa-nav__link">Technology Partnerships Office</a>
|
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|
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</li>
|
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|
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</ul>
|
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|
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</ul>
|
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</div>
|
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|
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|
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<button class="usa-accordion__button usa-nav__link" aria-expanded="false" aria-controls="primary_menu-4"><span>Services & Resources</span></button>
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|
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<a href="/content/standards-measurements" class="usa-nav__link">Standards and Measurements</a>
|
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|
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<li>
|
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|
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<a href="/calibrations" class="usa-nav__link">Calibration Services</a>
|
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|
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|
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|
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<li>
|
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|
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<a href="/nvlap" class="usa-nav__link">Laboratory Accreditation (NVLAP)</a>
|
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|
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|
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|
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<li>
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|
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<a href="/nist-quality-system" class="usa-nav__link">Quality System</a>
|
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|
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|
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<a href="/srm" class="usa-nav__link">Standard Reference Materials (SRMs)</a>
|
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|
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|
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|
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<li>
|
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|
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<a href="/sri" class="usa-nav__link">Standard Reference Instruments (SRIs)</a>
|
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|
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|
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|
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<li>
|
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|
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<a href="/standardsgov" class="usa-nav__link">Standards.gov</a>
|
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|
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|
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|
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<a href="/pml/time-and-frequency-division/time-services" class="usa-nav__link">Time Services</a>
|
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<a href="/pml/owm" class="usa-nav__link">Office of Weights and Measures</a>
|
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</ul></div><div class="column-break tablet:grid-col-fill"><ul class="usa-nav__submenu-list">
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|
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|
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<a href="/data" class="usa-nav__link">Data</a>
|
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<ul class="usa-nav__submenu-list">
|
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<li>
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<a href="https://webbook.nist.gov/chemistry/" class="usa-nav__link">Chemistry WebBook</a>
|
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</li>
|
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<li>
|
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|
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<a href="https://nvd.nist.gov/" class="usa-nav__link">National Vulnerability Database</a>
|
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<li>
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<a href="/pml/productsservices/physical-reference-data" class="usa-nav__link">Physical Reference Data</a>
|
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|
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</li>
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<li>
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<a href="/srd" class="usa-nav__link">Standard Reference Data (SRD)</a>
|
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</ul>
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<a href="https://shop.nist.gov/" class="usa-nav__link">Storefront</a>
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<a href="/tpo" class="usa-nav__link">License & Patents</a>
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</ul></div><div class="column-break tablet:grid-col-fill"><ul class="usa-nav__submenu-list">
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<a href="https://csrc.nist.gov/" class="usa-nav__link">Computer Security Resource Center (CSRC)</a>
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<a href="/nist-research-library" class="usa-nav__link">NIST Research Library</a>
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</ul>
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</div>
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</div>
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</div>
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<li class="usa-nav__primary-item">
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<h1 class="nist-page__title">20 Years Later: NIST's World Trade Center Investigation and Its Legacy</h1>
|
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<div class="daterange"><time datetime="2021-08-18T12:00:00Z">August 18, 2021</time>
|
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<span>By: </span>
|
|||
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<a href="/blogs/taking-measure/authors/s-shyam-sunder" hreflang="en">S. Shyam Sunder</a>
|
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<a href="mailto:?subject=NIST.gov&body=Check out this site https://www.nist.gov/blogs/taking-measure/20-years-later-nists-world-trade-center-investigation-and-its-legacy"
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<figure class="nist-image--lightbox nist-image" data-lightbox="https://www.nist.gov/sites/default/files/styles/2800_x_2800_limit/public/images/2021/08/16/WTC-style_Sunder2_0.jpg?itok=4U6SgZIz" data-media-id="619806">
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<img loading="lazy" src="/sites/default/files/styles/960_x_960_limit/public/images/2021/08/16/WTC-style_Sunder2_0.jpg?itok=cvg7la-Q" width="960" height="600" alt="collage showing rubble from the collapse of the towers, a mock up of a section of the towers, scientists looking at structural steel and the words Building and Fire Codes" typeof="foaf:Image" />
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</div>
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<div class="nist-image__credit">
|
|||
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<span class="nist-image__credit-label">Credit:</span>
|
|||
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|
|||
|
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N. Hanacek/NIST
|
|||
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|
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</div>
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</figcaption>
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<p>The collapse of the World Trade Center (WTC) buildings following the terrorist attacks of Sept. 11, 2001, was one of the worst-ever building disasters in recorded history — killing 2,749 people. More than 400 emergency responders were among those killed, the largest loss of life for this group in a single incident.</p><p>I was shocked to learn of the 9/11 terrorist attacks, along with the rest of the nation, while attending a conference in Krakow, Poland. My immediate thoughts that Tuesday turned to the safety of my family back home. Once I talked to them and knew they were safe, I decided to fly to Berlin since that would give me more options to get home quickly once flights resumed over U.S. airspace. Over breakfast at the Berlin hotel that Friday, I began sketching out initial ideas for our response that would involve a reconnaissance and assessment phase followed by a more detailed investigation.</p><p>A few weeks later, other National Institute of Standards and Technology (NIST) leaders and I began briefing policy leaders at the Department of Commerce, the parent agency of NIST. We explained the ways in which our agency could help determine the technical reasons why the buildings collapsed — and how this knowledge could not only provide answers for all those affected by the WTC disaster but also help make all buildings safer in the future. Meeting with House and Senate congressional staff, we discussed the lack of adequate authorities for any government agency, not just NIST, to conduct technical investigations into such building collapses. We reminded them about NIST’s long history and expertise in conducting <a href="/disaster-failure-studies/studies-hazard-types" data-entity-type="node" data-entity-uuid="ad7253ba-9766-4285-ad01-871737c04029" data-entity-substitution="canonical" title="Studies by Hazard Types">disaster and failure studies</a>, from the Gulf Coast structures destroyed by Hurricane Camille in 1969 and the 1971 San Fernando earthquake to the collapse of the Kansas City Hyatt Regency Hotel walkway in 1981 and the collapse of Connecticut’s L’Ambiance Plaza building in 1987.</p><p>After numerous briefings and two hearings at which the NIST director and others testified, Congress enacted, and the president signed into law, the <a href="https://www.congress.gov/congressional-report/107th-congress/house-report/530">National Construction Safety Team</a> (NCST) Act of 2002. This law, for the first time, gave NIST a comprehensive set of authorities to conduct technical investigations in the wake of any building failure that resulted in substantial loss of life or posed a significant threat of doing so. Congress directed $16 million to support the NIST investigation as part of an emergency supplemental appropriations for the 2002 fiscal year.</p><p>I had the unique opportunity and privilege to be engaged in every aspect of the investigation from its conception, planning and budgeting to its execution, communication and the implementation of its recommendations via standards, codes and industry organizations. I was appointed to lead the WTC investigation while serving as chief of the Structures Division, just seven years after I had joined NIST from the Massachusetts Institute of Technology (MIT). I embraced this immense new responsibility to help find out what happened on that day and what, if any, actions should be taken to make our buildings more resilient.</p><p>The NIST team for the WTC investigation included approximately 85 staff members from across the agency. But the investigation was not done only by NIST. The full investigation team consisted of more than 200 people, including world-class scientists and engineers from industry and academia, to help us meet the challenges of the investigation’s unprecedented scope, scale and technical complexity. The investigation team acted tirelessly with dedication to and in memory of the lives that were lost on that day, and with the complete objectivity and integrity that have guided NIST over its 120-year history. Our investigation also ben
|
|||
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<div data-media-id="621841">
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|||
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<div class="video-embed-field"><div class="video-embed-field-lazy" data-video-embed-field-lazy="<div class="video-embed-field-provider-nist-kaltura video-embed-field-responsive-video"><iframe width="854" height="480" frameborder="0" allow="autoplay *; fullscreen *; encrypted-media *" allowfullscreen="allowfullscreen" src="https://www.kaltura.com/p/684682/embedPlaykitJs/uiconf_id/55674542?iframeembed=true&amp;entry_id=1_nxs2rwl1"></iframe>
|
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</div>
|
|||
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"><img alt="NIST's World Trade Center Investigations" loading="lazy" src="https://cdnsecakmi.kaltura.com/p/684682/sp/68468200/thumbnail/entry_id/1_nxs2rwl1/width/1280" typeof="foaf:Image">
|
|||
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<button class="video-embed-field-lazy-play"></button>
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|||
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<div class="video-embed-field-lazy-title">NIST's World Trade Center Investigations</div>
|
|||
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|
|||
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|
|||
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|
|||
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|
|||
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<figcaption class="nist-image__caption">Learn more about NIST's work on the World Trade Center investigations, from how it conducted the study to the recommendations and their lasting legacy. Visit wtc.nist.gov</figcaption>
|
|||
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|
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class="nist-block"
|
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>
|
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<div class="nist-tags">
|
|||
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|
|||
|
|
<a href="/blogs/taking-measure/categories/248371">Buildings and Construction</a>,
|
|||
|
|
<a href="/blogs/taking-measure/categories/248376">Building codes and standards</a>,
|
|||
|
|
<a href="/blogs/taking-measure/categories/248386">Building damage and repair</a>,
|
|||
|
|
<a href="/blogs/taking-measure/categories/248586">Fire</a>,
|
|||
|
|
<a href="/blogs/taking-measure/categories/248616">Forensic Science</a>,
|
|||
|
|
<a href="/blogs/taking-measure/categories/249461">Public safety</a>,
|
|||
|
|
<a href="/blogs/taking-measure/categories/249316">First responder preparedness</a>,
|
|||
|
|
<a href="/blogs/taking-measure/categories/249321">Law enforcement</a>,
|
|||
|
|
<a href="/blogs/taking-measure/categories/249331">Public safety communications research</a> and
|
|||
|
|
<a href="/blogs/taking-measure/categories/248456">Disaster and failure studies</a></div>
|
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</div>
|
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|
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|
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>
|
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<h2
|
|||
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class="nist-block__title"
|
|||
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>About the author</h2>
|
|||
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|
|||
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<div class="nist-field nist-field--label-hidden entity-reference">
|
|||
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<div class="nist-field__items">
|
|||
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<div class="nist-field__item">
|
|||
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|
|||
|
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<article
|
|||
|
|
about="/blogs/taking-measure/authors/s-shyam-sunder" class="nist-teaser"
|
|||
|
|
>
|
|||
|
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<div class="nist-teaser__image">
|
|||
|
|
<div class="entity-reference"> <a href="/blogs/taking-measure/authors/s-shyam-sunder" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/annual_award/presidential-rank-shyam-sunder0_0.jpg?itok=CJhyyzGy" width="80" height="100" alt="Dr. Shyam Sunder" typeof="foaf:Image" />
|
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</a>
|
|||
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</div>
|
|||
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|
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</div>
|
|||
|
|
<div class="nist-teaser__content-wrapper">
|
|||
|
|
<header>
|
|||
|
|
<h3 class="nist-teaser__title"><a href="/blogs/taking-measure/authors/s-shyam-sunder"><span>S. Shyam Sunder</span>
|
|||
|
|
</a></h3>
|
|||
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|
|||
|
|
</header>
|
|||
|
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<div class="nist-teaser__content">
|
|||
|
|
<div class="text-with-summary"><p><span><span><span>S. Shyam Sunder led the <em>Federal Building and Fire Safety Investigation of the World Trade Center Disaster</em> in the aftermath of the terrorist attacks of Sept. 11, 2001.</span></span></span> <span><span><span>He is now the director of NIST’s Special Programs Office and its Chief Data Officer.</span></span></span> <span><span><span>Sunder is a recipient of the Presidential Rank Award of Distinguished Executive (2017), and the Gold Medal Award (2005) from the U.S. Department of Commerce, its highest honor, for distinguished leadership of the WTC investigation.</span></span></span> <span><span><span>Sunder was elected to the National Academy of Construction in 2012.</span></span></span></p></div>
|
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|
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</div>
|
|||
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</div>
|
|||
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</article>
|
|||
|
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</div>
|
|||
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</div>
|
|||
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</div>
|
|||
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|
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|
|||
|
|
</div>
|
|||
|
|
<div
|
|||
|
|
class="views-element-container nist-block no-print"
|
|||
|
|
>
|
|||
|
|
|
|||
|
|
<h2
|
|||
|
|
class="nist-block__title"
|
|||
|
|
>Related posts</h2>
|
|||
|
|
|
|||
|
|
<div><div class="js-view-dom-id-10f786a246a0f0a4f9b39f0d2e26a8f69e9f4edae6bbe62297901bb36d0e28a2">
|
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<div>
|
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|
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<article
|
|||
|
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about="/blogs/taking-measure/insulation-melts-your-walls-and-could-reduce-your-energy-costs" class="nist-teaser"
|
|||
|
|
>
|
|||
|
|
<div class="nist-teaser__image">
|
|||
|
|
<div class="entity-reference"> <a href="/blogs/taking-measure/insulation-melts-your-walls-and-could-reduce-your-energy-costs" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2025/01/30/jae_hyun_kim_portrait_012125.JPG?itok=JlrBhtoT" width="100" height="67" alt="A researcher in a lab coat and safety glasses poses next to a large piece of lab equipment." typeof="foaf:Image" />
|
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|
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</a>
|
|||
|
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</div>
|
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|
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</div>
|
|||
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<div class="nist-teaser__content-wrapper">
|
|||
|
|
<header>
|
|||
|
|
<h3 class="nist-teaser__title"><a href="/blogs/taking-measure/insulation-melts-your-walls-and-could-reduce-your-energy-costs"><span>The Insulation That Melts in Your Walls — and Could Reduce Your Energy Costs</span>
|
|||
|
|
</a></h3>
|
|||
|
|
<div class="nist-teaser__date">
|
|||
|
|
<div class="daterange"><time datetime="2025-02-26T12:00:00Z">February 26, 2025</time>
|
|||
|
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</div>
|
|||
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|
|||
|
|
</div>
|
|||
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|
|||
|
|
</header>
|
|||
|
|
<div class="nist-teaser__content">
|
|||
|
|
<div class="text-with-summary"> Wherever humans go, we take some form of insulation with us to keep us at just the right temperature. But just because the idea is old doesn’t mean that there
|
|||
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|
|||
|
|
</div>
|
|||
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|
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</div>
|
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</div>
|
|||
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</article>
|
|||
|
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</div>
|
|||
|
|
<div>
|
|||
|
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|
|||
|
|
<article
|
|||
|
|
about="/blogs/taking-measure/drones-disaster-zones-how-advanced-3d-mapping-technology-can-help-first" class="nist-teaser"
|
|||
|
|
>
|
|||
|
|
<div class="nist-teaser__image">
|
|||
|
|
<div class="entity-reference"> <a href="/blogs/taking-measure/drones-disaster-zones-how-advanced-3d-mapping-technology-can-help-first" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2025/01/06/judges_watching_drone_compeition_012925.jpg?itok=2msUHID6" width="100" height="67" alt="Four men are protected by a net structure as they look away from the camera toward a drone flying in a large high-ceilinged room with street signs on the walls." typeof="foaf:Image" />
|
|||
|
|
|
|||
|
|
</a>
|
|||
|
|
</div>
|
|||
|
|
|
|||
|
|
</div>
|
|||
|
|
<div class="nist-teaser__content-wrapper">
|
|||
|
|
<header>
|
|||
|
|
<h3 class="nist-teaser__title"><a href="/blogs/taking-measure/drones-disaster-zones-how-advanced-3d-mapping-technology-can-help-first"><span>Drones in Disaster Zones: How Advanced 3D Mapping Technology Can Help First Responders Save Lives</span>
|
|||
|
|
</a></h3>
|
|||
|
|
<div class="nist-teaser__date">
|
|||
|
|
<div class="daterange"><time datetime="2025-01-29T12:00:00Z">January 29, 2025</time>
|
|||
|
|
</div>
|
|||
|
|
|
|||
|
|
</div>
|
|||
|
|
|
|||
|
|
</header>
|
|||
|
|
<div class="nist-teaser__content">
|
|||
|
|
<div class="text-with-summary"> NIST is working to help emergency workers have more information in a crisis by encouraging the development of advanced drones at an affordable price.
|
|||
|
|
|
|||
|
|
</div>
|
|||
|
|
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</article>
|
|||
|
|
</div>
|
|||
|
|
<div>
|
|||
|
|
|
|||
|
|
<article
|
|||
|
|
about="/blogs/taking-measure/speeding-wheels-justice-how-nist-resources-can-help-crime-labs-work-faster" class="nist-teaser"
|
|||
|
|
>
|
|||
|
|
<div class="nist-teaser__image">
|
|||
|
|
<div class="entity-reference"> <a href="/blogs/taking-measure/speeding-wheels-justice-how-nist-resources-can-help-crime-labs-work-faster" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2024/12/04/briana_lab_table_web_ready_111824jpg.jpg?itok=bgbOWjEm" width="100" height="76" alt="Briana Capistran wears safety glasses as she poses smiling in the lab with computers and other equipment in the background. " typeof="foaf:Image" />
|
|||
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|
|||
|
|
</a>
|
|||
|
|
</div>
|
|||
|
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|
|||
|
|
</div>
|
|||
|
|
<div class="nist-teaser__content-wrapper">
|
|||
|
|
<header>
|
|||
|
|
<h3 class="nist-teaser__title"><a href="/blogs/taking-measure/speeding-wheels-justice-how-nist-resources-can-help-crime-labs-work-faster"><span>Speeding Up the Wheels of Justice: How NIST Resources Can Help Crime Labs Work Faster</span>
|
|||
|
|
</a></h3>
|
|||
|
|
<div class="nist-teaser__date">
|
|||
|
|
<div class="daterange"><time datetime="2025-01-08T12:00:00Z">January 8, 2025</time>
|
|||
|
|
</div>
|
|||
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|
|||
|
|
</div>
|
|||
|
|
|
|||
|
|
</header>
|
|||
|
|
<div class="nist-teaser__content">
|
|||
|
|
<div class="text-with-summary"> Forensic science is not as easy as it looks on TV. But NIST resources are helping crime labs examine evidence more efficiently — so the justice system can work
|
|||
|
|
|
|||
|
|
</div>
|
|||
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|
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</article>
|
|||
|
|
</div>
|
|||
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|
|||
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|
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|
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|
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|
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</div>
|
|||
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</div>
|
|||
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|
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|
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</div>
|
|||
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|
|||
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|
|||
|
|
<div
|
|||
|
|
class="nist-block no-print"
|
|||
|
|
>
|
|||
|
|
|
|||
|
|
<h2
|
|||
|
|
class="nist-block__title"
|
|||
|
|
>Comments</h2>
|
|||
|
|
|
|||
|
|
<section>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<article data-comment-user-id="0" id="comment-102206" class="nist-comment js-comment">
|
|||
|
|
|
|||
|
|
|
|||
|
|
<footer class="nist-comment__info">
|
|||
|
|
<p class="submitted">
|
|||
|
|
<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="">Kevin Berent</span></span>
|
|||
|
|
on
|
|||
|
|
<span class="nist-comment__date">August 18, 2021 11:46 AM</span>
|
|||
|
|
<mark class="hidden nist-comment__new" data-comment-timestamp="1629301706"></mark>
|
|||
|
|
</p>
|
|||
|
|
|
|||
|
|
<div class="nist-comment__permalink"><a href="#comment-102206">Permalink</a></div>
|
|||
|
|
|
|||
|
|
</footer>
|
|||
|
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|
|||
|
|
<div class="nist-comment__content">
|
|||
|
|
<div class="text-long"><p>Well done. Thank you for sharing, and for all your hard work to help others.</p>
|
|||
|
|
</div>
|
|||
|
|
|
|||
|
|
<ul class="links inline nist-comment__links">
|
|||
|
|
<li class="comment-reply nist-comment__link">
|
|||
|
|
<a href="/comment/reply/node/1677626/comment_node_blog/102206">Reply</a></li></ul>
|
|||
|
|
</div>
|
|||
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|
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|
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</article>
|
|||
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|
|||
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|
|||
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|
|||
|
|
<article data-comment-user-id="0" id="comment-102211" class="nist-comment js-comment">
|
|||
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|
|||
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|
|||
|
|
<footer class="nist-comment__info">
|
|||
|
|
<p class="submitted">
|
|||
|
|
<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="">Edward Brown</span></span>
|
|||
|
|
on
|
|||
|
|
<span class="nist-comment__date">August 18, 2021 2:49 PM</span>
|
|||
|
|
<mark class="hidden nist-comment__new" data-comment-timestamp="1629318701"></mark>
|
|||
|
|
</p>
|
|||
|
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|
|||
|
|
<div class="nist-comment__permalink"><a href="#comment-102211">Permalink</a></div>
|
|||
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|
|||
|
|
</footer>
|
|||
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|
|||
|
|
<div class="nist-comment__content">
|
|||
|
|
<div class="text-long"><p>Did your team investigate whether toxic fumes were emitted by the burning of insulation on telecommunications wiring?</p>
|
|||
|
|
</div>
|
|||
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|
|||
|
|
<ul class="links inline nist-comment__links">
|
|||
|
|
<li class="comment-reply nist-comment__link">
|
|||
|
|
<a href="/comment/reply/node/1677626/comment_node_blog/102211">Reply</a></li></ul>
|
|||
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</div>
|
|||
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|
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|
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</article>
|
|||
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|
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|
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|
|||
|
|
<article data-comment-user-id="0" id="comment-102216" class="nist-comment js-comment">
|
|||
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|
|||
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|
|||
|
|
<footer class="nist-comment__info">
|
|||
|
|
<p class="submitted">
|
|||
|
|
<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="">Francis Nyandeh</span></span>
|
|||
|
|
on
|
|||
|
|
<span class="nist-comment__date">August 18, 2021 2:49 PM</span>
|
|||
|
|
<mark class="hidden nist-comment__new" data-comment-timestamp="1629318695"></mark>
|
|||
|
|
</p>
|
|||
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|
|||
|
|
<div class="nist-comment__permalink"><a href="#comment-102216">Permalink</a></div>
|
|||
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|
|||
|
|
</footer>
|
|||
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|
|||
|
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<div class="nist-comment__content">
|
|||
|
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<div class="text-long"><p>Did you test for the vibrational properties of the non- metallic components of the structures?<br />
|
|||
|
|
The reason being that if there have been other heavy construction around those buildings before the collapse and the materials were not designed to withstand the vibrations from the nearby heavy construction machinery then there is the possibility of internal cracks in the non-metallic components . The plane hitting it just shook the material to fracture.<br />
|
|||
|
|
I believe the same phenomenom was possible for the surfside collapse in Florida.<br />
|
|||
|
|
There the need to redesign our cement and mortar.</p>
|
|||
|
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</div>
|
|||
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|
|||
|
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<ul class="links inline nist-comment__links">
|
|||
|
|
<li class="comment-reply nist-comment__link">
|
|||
|
|
<a href="/comment/reply/node/1677626/comment_node_blog/102216">Reply</a></li></ul>
|
|||
|
|
</div>
|
|||
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|
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</article>
|
|||
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|
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|
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|
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<article data-comment-user-id="0" id="comment-102301" class="nist-comment js-comment">
|
|||
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|
|||
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|
|||
|
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<footer class="nist-comment__info">
|
|||
|
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<p class="submitted">
|
|||
|
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<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="">Trevor Thomson</span></span>
|
|||
|
|
on
|
|||
|
|
<span class="nist-comment__date">August 20, 2021 10:33 AM</span>
|
|||
|
|
<mark class="hidden nist-comment__new" data-comment-timestamp="1629470376"></mark>
|
|||
|
|
</p>
|
|||
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|
|||
|
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<div class="nist-comment__permalink"><a href="#comment-102301">Permalink</a></div>
|
|||
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|
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</footer>
|
|||
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|
|||
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<div class="nist-comment__content">
|
|||
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<div class="text-long"><p>Hi Mr Sunder<br />
|
|||
|
|
I remember watching in horror as the tragic scene was displayed on TV, fortunately being in SA I was not impacted directly but can only imagine the terrible tragic especially after watching Netflix film recently with Nicholas Cage trapped underground. My question to you as a Force Metrologist and seeing various rumours or videos that their was more involved then what meets the eye, as in the speculation that the Towers could not simply collapse straight down and conspiracy theory's that the structural foundations where tampered with or even explosions set of at the precise time to weaken this , i would really like to know from someone like yourself is this was just propaganda or reality that everyone has ignored. I could not imagine where it to happen in Cape Town as it would be like a surreal nightmare and my heart goes out to everyone involved and families who lost there loved ones in the brave call of duty.</p>
|
|||
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</div>
|
|||
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|
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<ul class="links inline nist-comment__links">
|
|||
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<li class="comment-reply nist-comment__link">
|
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<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="">Kevin Carr</span></span>
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<span class="nist-comment__date">August 20, 2021 10:45 AM</span>
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<div class="text-long"><p>Shyam,</p>
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<p>In reflecting back on my time at NIST, I often think of the work of you and your team on the WTC investigation as one of the most, if not the most, proud moments of just being affiliated with the Institute and the work carried out there. Your leadership was instrumental in the success of this monumental project. It was a very real and publicly tangible example of the important work done by NIST, which is often lost on the general public. And as you point out, it is less about simply understanding why this disaster happen in the manner that it did, but more importantly, what can we learn to improve our future developments and the safety and, in this case, resilience of existing and future building structures. That's where the real, true, and ironically immeasurable, impact of of NIST's work resides: in the disasters that didn't happen in the future. </p>
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<p>Kevin Carr, former MEP Director</p>
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<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="">Shyam</span></span>
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on
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<span class="nist-comment__date">August 20, 2021 11:30 AM</span>
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<span class="nist-comment__parent">| Replied to <a href="/comment/102306#comment-102306" class="permalink" rel="bookmark" hreflang="en">Shyam,
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In reflecting back on…</a></span>
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<div class="text-long"><p>Kevin,</p>
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<p>Thank you so much for your comments. As you so rightly observe, the real, true, and immeasurable impact of NIST's work on future developments and safety. As you know, this was a team effort with extensive engagement of all those affected by the horrific events and their consequences as well as the broader public.</p>
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<p>Shyam Sunder, Lead Investigator</p>
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<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="">Henry Shevko</span></span>
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<span class="nist-comment__date">August 20, 2021 10:56 AM</span>
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<div class="text-long"><p>I noticed this article makes no mention of Architects and Engineers for 9/11 Truth. Will NIST disclose to the public the computer inputs of its mathematical models used for simulating how the buildings were destroyed? Thank you.</p>
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<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="">Mark Esser, Editor</span></span>
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on
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<span class="nist-comment__date">August 20, 2021 1:22 PM</span>
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<mark class="hidden nist-comment__new" data-comment-timestamp="1629480314"></mark>
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<span class="nist-comment__parent">| Replied to <a href="/comment/102311#comment-102311" class="permalink" rel="bookmark" hreflang="en">I noticed this article makes…</a></span>
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<div class="text-long"><p>Henry, Thank you for your question. This information was exempt from public disclosure under Section 7d of the National Construction Safety Team Act because it was determined by the Director of NIST that release of the files might jeopardize public safety. The withheld information contains detailed connection models that have been validated against actual events, and therefore, provide tools that could be used to predict the collapse of a building. The information contained in the withheld files is sufficiently detailed that it might be used to develop plans to destroy other, similarly constructed, buildings. </p>
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<p>In Michael Quick v. United States Department of Commerce, National Institute of Standards and Technology, Civil Action No. 09-02064 (CKK) U.S. District Court of the District of Columbia, Apr. 7, 2011, the court upheld NIST’s finding to withhold this information.</p>
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<p>Thank you.</p>
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<article data-comment-user-id="0" id="comment-102326" class="nist-comment js-comment">
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<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="">Henry Shevko</span></span>
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on
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<span class="nist-comment__date">August 20, 2021 1:49 PM</span>
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<span class="nist-comment__parent">| Replied to <a href="/comment/102321#comment-102321" class="permalink" rel="bookmark" hreflang="en">Henry, Thank you for your…</a></span>
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<div class="text-long"><p>Thank you for your response, Mark. Is there a more complete version of the WTC 7 collapse simulation? The only simulation I have been able to review is the NIST WTC 7 collapse model where the building begins to bend and warp in on itself, but the simulation does not show the free fall speed as observed by witnesses and recorded on multiple news footage videos. Would NIST be willing to provide data inputs and mathematical models for just the free fall portion of the collapse after collapse initiation? I believe the collapse initiation is what is being guarded from the public, correct? Thanks again.</p>
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<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="">Mark Esser, Editor</span></span>
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on
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<span class="nist-comment__date">August 20, 2021 2:30 PM</span>
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<span class="nist-comment__parent">| Replied to <a href="/comment/102326#comment-102326" class="permalink" rel="bookmark" hreflang="en">Thank you for your response,…</a></span>
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<div class="text-long"><p>Please see #11 and #29 at <a href="https://www.nist.gov/topics/disaster-failure-studies/faqs-nist-wtc-7-investigation">https://www.nist.gov/topics/disaster-failure-studies/faqs-nist-wtc-7-in…</a> for answers to your questions. All the public data we have available on our World Trade Center investigation is at <a href="https://www.nist.gov/topics/disaster-failure-studies/world-trade-center-disaster-study/disaster-and-failure-studies">https://www.nist.gov/topics/disaster-failure-studies/world-trade-center…</a>.</p>
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<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="">Henry Shevko</span></span>
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on
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<span class="nist-comment__date">August 20, 2021 4:44 PM</span>
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<mark class="hidden nist-comment__new" data-comment-timestamp="1629738706"></mark>
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<span class="nist-comment__parent">| Replied to <a href="/comment/102331#comment-102331" class="permalink" rel="bookmark" hreflang="en">Please see #11 and #29 at…</a></span>
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<div class="text-long"><p>Has NIST reached out to Richard Gage and the over 3400 architects and engineers petitioning for a new investigation for the collapse of the buildings? At least one of those members is a former NIST employee, Peter Michael Ketcham. They are willing to share their results after years of investigating the building destruction themselves and using data NIST has provided. Richard Gage does a frequent review of the WTC tower destruction with detailed information on YouTube - ae911truth. Please feel free to publicly refute those sessions as Mr. Gage's presentations seem to refute the each of NIST's findings. It seems unscientific and a bit shady to not address alternative destruction theories. The NIST FAQs seem to be in damage control mode rather than addressing some legitimate concerns that should be reviewed.</p>
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<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="">Mark Esser, Editor</span></span>
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<span class="nist-comment__date">August 24, 2021 8:09 AM</span>
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<span class="nist-comment__parent">| Replied to <a href="/comment/102336#comment-102336" class="permalink" rel="bookmark" hreflang="en">Has NIST reached out to…</a></span>
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<div class="text-long"><p>NIST is aware of other research related to the WTC collapse. We stand by our original findings.</p>
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<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="">Henry Shevko</span></span>
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on
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<span class="nist-comment__date">August 30, 2021 12:40 PM</span>
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<span class="nist-comment__parent">| Replied to <a href="/comment/102371#comment-102371" class="permalink" rel="bookmark" hreflang="en">NIST is aware of other…</a></span>
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<div class="text-long"><p>But NIST's original findings are incorrect and have been shown by multiple institutions to be incomplete and error prone. You will not provide the input data or mathematical models to prove your findings so that makes NIST suspicious and research illegitimate. Your computer models and conclusions do not match observation. We can clearly see explosions traveling down both towers during the period of destruction. Why will NIST not allow the thousands of engineers, architects, and university professors to provide an alternate theory? We need a new investigation. The hubris for you all to congratulate each other is insulting.</p>
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<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="">Brad Bauman</span></span>
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on
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<span class="nist-comment__date">September 13, 2023 10:28 PM</span>
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<span class="nist-comment__parent">| Replied to <a href="/comment/102321#comment-102321" class="permalink" rel="bookmark" hreflang="en">Henry, Thank you for your…</a></span>
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<div class="text-long"><p>In other words it was redacted.</p>
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<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="">Rube Goldberg</span></span>
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on
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<span class="nist-comment__date">August 20, 2021 8:01 PM</span>
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<div class="text-long"><p>Does the computer model that NIST produced match all the evidence observed? The NIST description seems to be far too complex. What does NIST have to say about all the reported molten steel and the measured temperatures of higher than 2000 F that lasted 6 weeks?</p>
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<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="">Mark Esser, Editor</span></span>
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on
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<span class="nist-comment__date">August 23, 2021 8:03 AM</span>
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<mark class="hidden nist-comment__new" data-comment-timestamp="1629739949"></mark>
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<span class="nist-comment__parent">| Replied to <a href="/comment/102341#comment-102341" class="permalink" rel="bookmark" hreflang="en">Does the computer model that…</a></span>
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<div class="text-long"><p>Thank you for your questions. You can find a summary of NIST's answers to these and other commonly asked questions at <a href="https://www.nist.gov/disaster-failure-studies/faqs-nist-wtc-towers-investigation">https://www.nist.gov/disaster-failure-studies/faqs-nist-wtc-towers-inve…</a> and <a href="https://www.nist.gov/topics/disaster-failure-studies/faqs-nist-wtc-7-investigation">https://www.nist.gov/topics/disaster-failure-studies/faqs-nist-wtc-7-in…</a>.</p>
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<article data-comment-user-id="0" id="comment-102781" class="nist-comment js-comment">
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<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="">Derrick</span></span>
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on
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<span class="nist-comment__date">September 11, 2021 5:07 AM</span>
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<div class="text-long"><p>How are you dealing with the active lawsuit against your agency for arbitrary and capricious<br />
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actions? You cannot hide from the truth forever. I look forward to the day that a grand jury reviews the mountains of evidence that support WTC1, 2 and 7 were all destroyed via controlled demolition, with thermite as the incendiary. </p>
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<p><a href="https://files.wtc7report.org/file/public-download/Complaint+AE+et+al+v+NIST+et+al+1-main+filed+090721.pdf?fbclid=IwAR2oJk5jjYN7Y6RLRB2CnoYxhOUJYb3Sn14McvPULR3bCLoj4-SiOeoPET4">https://files.wtc7report.org/file/public-download/Complaint+AE+et+al+v+…</a></p>
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<article data-comment-user-id="0" id="comment-102791" class="nist-comment js-comment">
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<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="" content="Sandeep Goel - Proion MEP, India ">Sandeep Goel - Proion MEP, India </span></span>
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on
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<span class="nist-comment__date">September 12, 2021 11:12 PM</span>
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<div class="text-long"><p>Dear Dr Shyam Sunder, I write this message from India. I had the honour to meet you at UL Conference sometime in 2008. The detailed investigation helped for us to also<br />
|
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learn and update our codes back here at India as we revised the National Building Code in 2005 and 2016. We compliment and express gratitude to Team NIST for such extensive research and sharing. With good wishes.</p>
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<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="" content="Shyam Sunder, Lead Investigator">Shyam Sunder, Lead Investigator</span></span>
|
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on
|
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<span class="nist-comment__date">September 13, 2021 10:58 AM</span>
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<mark class="hidden nist-comment__new" data-comment-timestamp="1631545354"></mark>
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<span class="nist-comment__parent">| Replied to <a href="/comment/102791#comment-102791" class="permalink" rel="bookmark" hreflang="en">Dear Dr Shyam Sunder, I…</a></span>
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<div class="text-long"><p>Dear Mr. Sandeep Goel,</p>
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<p>We are delighted to learn that NIST's WTC Investigation was helpful in updating the National Building Code of India. Thank you very much for sharing this information with us.</p>
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<article data-comment-user-id="0" id="comment-102801" class="nist-comment js-comment">
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<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="">Martin Durko</span></span>
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on
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<span class="nist-comment__date">September 13, 2021 4:36 AM</span>
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<div class="text-long"><p>Dear Mr. S. Shyam Sunder et al.,<br />
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We all understand how different types of threats and coercion might impact human behavior and professional integrity. Despite all of that, we all should be able, in a time of self-reflection, to realize that truth is a liberating element in life. Especially once we get older and start seeing the world from a different, more mature perspective. We usually start thinking about our legacy and the side of good vs evil we took while inhabiting this planet. It must be very exhausting and "soul" killing to continue walking along the path someone had forced you to walk on a long time ago. It seems to me, that you have become more of a politician over the long years of your career at NIST. Your choice of words in the above article attests to it very clearly. Why don't you look inside of your "heart", think about everything again and do the right thing? You could help to transform this world into a better place for all of us. I can guarantee you that the tangible loses are significantly outweighed by the intangible ones!</p>
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<article data-comment-user-id="0" id="comment-103611" class="nist-comment js-comment">
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<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="">Henry Doogan</span></span>
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on
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<span class="nist-comment__date">October 26, 2021 4:49 AM</span>
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<div class="text-long"><p>Hi Dr Sunder,</p>
|
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<p>I have a question regarding certain footnotes in the NCSTAR 1 report.</p>
|
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<p>Footnotes 13 (Chapter 6 Reconstruction of the Collapses 6.1 APPROACH page 82) and 2 (Executive Summary E.3 SUMMARY OF FINDINGS page xxxvii) are similar with both outlining the overall focus of the NIST investigation and noting what the “Probable Collapse Sequence” refers to. The difference lies in the amount of focus, one noting none, the other noting little. To compare below, discarding the reference component and bracketing the different wording, firstly for 13 than 2 within the remaining body of text, highlights the alternate meanings.</p>
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<p>The focus of the Investigation (does not actually include) the structural behavior of the tower after the conditions for collapse initiation were reached and collapse became inevitable.</p>
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<p>The focus of the Investigation (includes little analysis of) the structural behavior of the tower after the conditions for collapse initiation were reached and collapse became inevitable.</p>
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<p>Although both footnotes refer to the same thing, in light of 13 having been positioned within the main body of the report itself, it’s understood NIST only investigated factors leading to the initiation of collapses of the WTC towers, not the collapses themselves. </p>
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<p>Taking into consideration: </p>
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<p>1) Executive summaries are a concise version of and typically written after a report &<br />
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2) You stated in your Sep 2018 lecture (D-RED Speaker Series: How & Why the World Trade Center Collapsed) at Morgan State University, “There were two people who read every word in those reports, one was me the other was the lawyer.” </p>
|
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<p>Why did you and the lawyer you mentioned choose to publish NCSTAR 1 with an alternate version of footnote 13 in the executive summary, otherwise known as footnote 2?</p>
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<article data-comment-user-id="0" id="comment-103976" class="nist-comment js-comment">
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<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="">Henry Doogan</span></span>
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on
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<span class="nist-comment__date">November 13, 2021 11:41 PM</span>
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<mark class="hidden nist-comment__new" data-comment-timestamp="1636983930"></mark>
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<div class="text-long"><p>Hi Dr. Sunder,</p>
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<p>I hope you’re well.</p>
|
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<p>I have a question regarding Table P-1. Federal building and fire safety investigation of the WTC disaster as published in NCSTAR 1.</p>
|
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<p>Considering the final report was written with the public in mind as a summary of what happened and how NIST addressed the issues with the sense that most members of the public likely won’t read any of the companion reports, why didn’t NIST detail that no steel was recovered from WTC 7 in the project purpose for the technical area of the Mechanical and Metallurgical Analysis of Structural Steel?</p>
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<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="">Ben Heideveld</span></span>
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on
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<span class="nist-comment__date">December 24, 2022 9:06 AM</span>
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<div class="text-long"><p>Dear Dr. Sunder, You remark justly that heat weakens steel and make a strong argument for collapse initiation. However, the steel of the as yet undestructed building was intact and not heated from kerosene doused office furniture fires. From the collapse time of both towers we can see a fairly constant acceleration at about two thirds of full free fall acceleration. This shows that the not-yet-collapsing part of the building must have been exerting a force of about one third of the weight of the collapsing top to lower its downwards acceleration. Newton’s third Law then tells us that the force that the collapsing top exerted on the as-yet-undestructed bottom part of the building must have also been a third of the collapsing top’s weight. Given that the towers were engineered to carry five times the weight of everything above at every floor, we have to wonder how it didn’t hold only one third of that weight. However, your team decided to stop investigating building performance at the point of collapse initiation, remarking global collapse became inevitable at that point. Given my argument, an investigation into the building performance during collapse would be worthwhile at some point into the future.</p>
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<article data-comment-user-id="0" id="comment-117011" class="nist-comment js-comment">
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<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="">Brad Bauman</span></span>
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<span class="nist-comment__date">September 13, 2023 10:18 PM</span>
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<div class="text-long"><p>I'm curious to know how experts are able to tell that the two columns were from where the plane struck WTC 1.</p>
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<span class="nist-comment__author"><span lang="" typeof="schema:Person" property="schema:name" datatype="">NIST</span></span>
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on
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<span class="nist-comment__date">September 14, 2023 11:00 AM</span>
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<span class="nist-comment__parent">| Replied to <a href="/comment/117011#comment-117011" class="permalink" rel="bookmark" hreflang="en">I'm curious to know how…</a></span>
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<div class="text-long"><p>There are a number of FAQs on the NIST website that address the columns. Here is a link: <a href="https://www.nist.gov/world-trade-center-investigation/study-faqs">https://www.nist.gov/world-trade-center-investigation/study-faqs</a></p>
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