A preliminary report by Norwegian risk management company DNV indicates that construction errors were to blame for last month’s collapse of a Mexico City metro overpass, which killed 26 people and injured 76.
Subpar welding, along with the use of too few studs, likely caused a structural collapse exacerbated by deferred maintenance, stated the report, which corroborated an earlier New York Times investigation that cited engineering experts.
The accident occurred on the city’s 12th subway line, which opened in 2012, and was built by billionaire Carlos Slim’s Grupo Carso, which is also constructing parts of the 950-mile-long Tren Maya tourist train line in southern Mexico.