In August 2011, the apartment building at 1625 North Ode Street experienced differential settlement and damage after the excavation support at an adjacent construction site failed. SGH assessed the condition of the existing four-story building...
Falling debris from the collapse of the World Trade Center towers (WTC 1 and 2) damaged the building at 7 World Trade Center (WTC 7) and ignited fires. After several hours of fire exposure, WTC 7 also collapsed. SGH analyzed the fire...
On the morning of 11 September 2001, hijackers crashed a commercial plane into the Pentagon. Following that attack, the American Society of Civil Engineers established a building performance study (BPS) team to examine the structural...
On 19 December 2008, a large portion of the S-shaped, steel-framed walkway under construction at the Atlanta Botanical Garden suddenly collapsed during concrete placement operations. The approximately 575 ft long, cable-stayed canopy bridge...
Over ten years, SGH researched innovative uses of High Strength Low Alloy Vanadium (HSLA-V) steels in a variety of structural applications under the Vanadium Technology Program, an initiative sponsored by the U.S. ARL in conjunction with VPRA....
Constructed in 1929, Boardwalk Hall has hosted many legendary entertainment icons and events. In 2002, following a major renovation, the venue installed an aluminum truss assembly to support rigging for show or event equipment. While...
On 2 May 2009, the Dallas Cowboys Training Facility collapsed during high winds. The fabric-covered structure fell on approximately seventy people, trapping some under the rubble. SGH, working in collaboration with Johns Hopkins...
On 25 January 1971, the sixteen-story apartment building at 2000 Commonwealth Avenue progressively collapsed during concrete placement for the mechanical penthouse floor slab above the main roof. SGH investigated the cause of the collapse,...
In July 1981, two suspended walkways spanning the dramatic atrium of the Hyatt Regency Hotel collapsed during a weekend Tea Dance. As a result, 114 people died and hundreds more were injured. Following the collapse, the construction manager...
On 9 March 2002, a 100 ft long, suspended scaffold platform fell from the 42nd floor of the John Hancock Center. As the scaffold fell, it dropped debris in an arc from the northwest corner to the building’s south face. The...
This paper presents findings from a research project on the development of a numerical framework to predict the collapse load of a wharf supported by corroded piles under gravitational loads. Data from a detailed marine investigation performed in...
By: Mehdi Zarghamee, Erbay, Omer O., Andrew Sarawit, McAllister, Therese P., Gross, John L., Sadek,Fahim, Kirkpatrick, Steven, MacNeill, Robert A., Bocchieri, Robert T.
Abstract: The National Institute of Standards and Technology (NIST) conducted an extensive investigation of the collapse of World Trade Center towers (WTC 1 and WTC 2) and the WTC 7 building. This paper describes the reconstruction of impact...
By: Mehdi Zarghamee, Erbay, Omer O., Andrew Sarawit, McAllister, Therese P., Gross, John L., Sadek,Fahim, Kirkpatrick, Steven, MacNeill, Robert A.
Abstract: The National Institute of Standards and Technology (NIST) conducted an extensive investigation of the collapse of World Trade Center towers (WTC 1 and WTC 2) and the WTC 7 building. This paper describes the component, subsystem, and...
Abstract: Over 100 buildings were examined which had damage or indications of distress due to an unusual accumulation of snow in north-eastern USA during the winter of 2010-2011. Approximately 40 of those buildings had a partial or total collapse...
Abstract: The Dallas Cowboys Practice Facility (DCPF) was a large, fabric-covered, lightweight steel truss structure that collapsed in May 2009. News coverage of the event was quick to identify high winds as the cause of the failure, but in...
This paper presents the structural analysis approach used and results obtained during the investigation conducted by the National Institute of Standards and Technology (NIST) to model the sequence of fire-induced damage and failures leading to...
Abstract: On 16 February 2004, one of two identical launching gantries used for the parallel construction of the approach viaducts for the I-280 Maumee River Bridge crossing collapsed. The collapse killed four workers and injured four others....
Since the terrorist attacks of September 11, 2001 and the collapse of three very tall buildings at New York's World Trade Center, some members of the public, building officials, legislators and engineers have stated a belief that present...
This article describes an analysis of the structural collapse that occurred in World Trade Center (WTC) building 5 due to fire exposure on 11 September 2001. It is hypothesized that the steel column-tree assembly failed during the heating phase...
Abstract: This document is intended to provide owners and practicing engineers with current best practices to reduce the likelihood of progressive collapse of buildings in the event of abnormal loading. The report includes a discussion of an...