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1625 North Ode Street

Arlington, VA

Project Contacts: Scott Silvester

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...

Services:Building Enclosure Design, Structural Investigation, Structural Rehabilitation

Markets:Residential - Apartment

Keywords:Collapse, Excavation Support, Failure Investigation, Masonry, Masonry-Brick, Masonry-CMU, Masonry-Load Bearing, Shoring/Temporary Structure, Wood

7 World Trade Center

New York, NY

Project Contacts: Donald Dusenberry

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...

Services:Structural Investigation

Markets:Office

Keywords:Collapse, Failure Investigation, Fire, Fire Engineering, Metal-Steel, Thermal

Pentagon, Building Performance Study

Washington, DC

Project Contacts: Donald Dusenberry

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...

Services:Structural Investigation

Markets:Government

Keywords:Blast Analysis & Resistance, Collapse, Concrete, Failure Investigation, Fire, Fire/Smoke, Security, Structural Adequacy Assessment

Atlanta Botanical Garden Walkway Collapse Investigation

Atlanta, GA

Project Contacts: Daniel Cook, Dominic Kelly, Scott Silvester

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...

Services:Structural Investigation

Markets:Bridge

Keywords:Bridge, Pedestrian, Collapse, Failure Investigation, Metal-Steel, Shoring/Temporary Structure

Vanadium Technology Program, Long-Span Trusses

San Francisco, CA

Project Contacts: Ronald Hamburger

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....

Services:Materials Investigation, Structural Investigation

Markets:Science & Defense

Keywords:Analytical Studies, Collapse, Fire, Fire Engineering, Fire Protection, Long-Span Structure, Metal, Metal-Steel, Research/Development

Boardwalk Hall

Atlantic City, NJ

Project Contacts: Dominic Kelly, Joseph Zona

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...

Services:Structural Investigation

Markets:Sports & Entertainment

Keywords:Collapse, Failure Investigation, Metal-Aluminum, Sport/Entertainment, Theater/Performing Arts

Dallas Cowboys Training Facility

Dallas, TX

Project Contacts: Donald Dusenberry, Rasko Ojdrovic

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...

Services:Structural Investigation

Markets:Sports & Entertainment

Keywords:Arena/Stadium, Canopy/Ceiling, Collapse, Failure Investigation

2000 Commonwealth Avenue

Boston, MA

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,...

Services:Structural Investigation

Markets:Residential - Apartment

Keywords:Collapse, Concrete-Reinforced, Failure Investigation

Hyatt Regency Hotel Walkway

Kansas City, MO

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...

Services:Structural Investigation

Markets:Hospitality

Keywords:Bridge, Pedestrian, Collapse, Expert Testimony, Failure Investigation, Metal-Steel

John Hancock Center, Scaffold Collapse

Chicago, IL

Project Contacts: Alec Zimmer

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 wreckage...

Services:Structural Investigation

Keywords:Collapse, Expert Testimony, Failure Investigation, Finite Element Analysis

Simpson Gumpertz & Heger

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Project Term Page Tabs

Looking for more?

1625 North Ode Street

7 World Trade Center

Pentagon, Building Performance Study

Atlanta Botanical Garden Walkway Collapse Investigation

Vanadium Technology Program, Long-Span Trusses

Boardwalk Hall

Dallas Cowboys Training Facility

2000 Commonwealth Avenue

Hyatt Regency Hotel Walkway

John Hancock Center, Scaffold Collapse

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