Industry
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Investigation of the April 5, 2011 Flow Equalization Basin Wall Collapse at Wastewater Treatment Plant in Gatlinburg, TN

The east wall of the 30 ft. high concrete equalization basin suddenly separated from the rest of the structure under the hydrostatic pressure, and fell over a one story control room structure killing two employees.
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Investigation of the December 19, 2008 Collapse of Atlanta Botanical Garden Canopy Walkway during Construction in Atlanta, GA

A spirally shaped pedestrian walkway steel bridge approximately 575' long and 11' to 18' wide under construction collapsed. At the time of the incident, concrete was being poured over the bridge deck. The collapse was massive, involving over seventy percent of the bridge. At the time of the collapse, the entire bridge structural frame was being supported over fifteen temporary shoring towers. One worker killed, 18 injured.
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Investigation of the July 31, 1997 Collapse of the Parking Garage Steel Framing at the Portland International Airport, Portland, Oregon

Construction was underway at the Portland International Airport in Portland, Oregon to add four additional levels of parking to transform the existing two-story precast concrete parking garage into a seven level parking structure. Two partially completed bays of structural steel, most of which were erected the same day, collapsed killing three ironworkers.
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Structural Collapse at the Olympic Swimming Venue, Atlanta, Georgia. March 18, 1996

A steel structure under construction 176 ft. x 312 ft. and 130 ft. high collapsed at the construction site for the Olympic Aquatic Center in Atlanta, Georgia. The structure, was an addition to the existing pool structure. Just prior to the collapse, the steel erection crew had erected a steel frame and a pair of steel joists spanning 176 ft. from an existing structure to the erected steel frame. The failure occurred within 15 to 30 minutes after the crane was released from the paired joists. The incident did not result in any injuries.
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Investigation of the December 16, 1999 Fatal Collapse of a Reinforcing Steel Cage at the Pier WB-12 of I-895 Bridge in Richmond, Virginia

A 44 ft. tall reinforcing steel cage weighing 80 tons fell over and killed one of the two workers working near the top of the cage. The deceased worker was caught between the collapsing reinforcing cage and the concrete footing surface. At the time of the incident, the two workers were installing horizontal ties. The wind at the time of the incident was about 25 mph.
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Investigation of the June 20, 2001 Partial Collapse of the Mast Climbing Platform at Cambridge, MA

The project consisted of construction of a six-story parking garage. The 55-foot long mast climbing platform consisted of 20 foot fixed platform plus extensions on either side supported in the center by a single mast. Three sections, each 5-foot long were installed on one side, and four sections were installed on the other side. The side, which had four sections collapsed. 3 workers were injured.
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Investigation of October 17, 1991 Roof Cable Structure Accident at Georgia Dome Construction Site, Atlanta, Georgia

A construction worker was killed and two workers were injured when their work platform, about 230 ft. above ground, was struck by a collapsing steel post, during the erection of the roof cable structure at the Georgia Dome in Atlanta, GA. The workers were in the process of hoisting the center truss in position to make the final connection of a diagonal cable to the bottom joint of the center truss. The construction workers were using hydraulic pumps to apply loads to the temporary jacking strands in order to make the permanent diagonal cable connection to the center truss.
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Investigation of the April 18, 2013 Partial Collapse of a Masonry Wall during construction of the Goodwill Retail Store in Hendersonville, TN

On April 18, 2013, partial collapse of a masonry wall occurred during construction of the Goodwill Retail Store in Hendersonville, TN. As a result of the wall collapse, two employees were killed and one was injured. The investigation and evaluation were based on the information provided by the Division of Occupational Safety and Health of the State of Tennessee. The project consisted of construction of a one-story Goodwill Retail Store, approximately 170 ft. wide x 180 ft. long.
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Investigation of the May 23, 2013 Partial Collapse of a Prestressed Concrete Double Tee at Montgomery Mall in Bethesda, MD

A construction incident occurred on May 23, 2013, at approximately 1:45 p.m., when a prestressed concrete double tee partially collapsed while it was being jacked, killing one employee and injuring another. The double tee was 60 ft. long and 9 ft. wide, with a depth of 2 ft. 3 in. and a slab thickness of 4 inches. The weight of the double tee was approximately 42,800 pounds. The incident site was the Westlake Garage of the Westfield Montgomery Mall in Bethesda, MD.
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Investigation of August 14, 1990 Collapse of Precast Concrete Beams at Airside Building, Midfield Terminal Project, Greater Pittsburgh International Airport, Allegheny County, Pennsylvania

The building under construction, the Airside Building, consisted of precast concrete beams, columns and precast prestressed hollow core concrete planks. During the erection and placement of hollow core precast planks at the roof level, several precast concrete beams, column, and hollow core planks at the roof and concourse levels collapsed. One construction worker, on the concourse level, died due to the falling debris of the collapsed beams and planks. Another construction worker was seriously injured.
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