Report blames poor welds for Mexico City subway collapse
ABC News
A preliminary report by experts into the collapse of a Mexico City elevated subway line that killed 26 people placed much of the blame on poor welds that joined steel support beams to a concrete layer supporting the track bed
MEXICO CITY -- A preliminary report by experts into the collapse of a Mexico City elevated subway line that killed 26 people placed much of the blame Wednesday on poor welds in studs that joined steel support beams to a concrete layer supporting the track bed. The city government hired Norwegian certification firm DNV to study the possible causes of the May 3 accident, in which a span of the elevated line buckled to the ground, dragging down two subway cars. The report also said there were apparently not enough studs, and the concrete poured over them may have been defective; the welds between stretches of steel beams also appear to have been badly done. “The studs showed deficiencies in the welding process,” the report states.More Related News