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News » US » Report published into I-85 bridge fire » published 12 Apr 2018

Report published into I-85 bridge fire

The National Transportation Safety Board (NTSB) has published a report into the collapse of a highway bridge that was set on fire in Atlanta last year.

NTSB as said that a decision by Georgia Department of Transportation (GDOT) to store combustible materials under the bridge in the collapse.

A 92-ft-long span of the Interstate 85 north overpass collapsed an hour after materials stored beneath it were set on fire. GDOT had been using the area as storage for 76 reels of high-density polyethylene conduit and nine racks of fiberglass conduit, left over from an earlier project.

The structural damage was so extensive that five bridge spans adjacent to the collapse also required removal. The US$15m replacement project was completed in just 43 days (link opens in new tab).

The NTSB determined that the probable cause of the fire and subsequent collapse of the span was excessive heat from the ignition of the materials. “Contributing to the bridge collapse was the decision of the Georgia Department of Transportation to store construction materials beneath the bridge and its failure to assess the increased fire risk due to the presence of these combustible materials,” said NTSB.

 

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This article was published on 12 Apr 2018 (last updated on 12 Apr 2018).

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