[Carry_Okie]

From what I've read, they're only testing five of thirty-two available locations. Considering the number of welds in the buried columns, that isn't much of a sample by which to prove a negative (that there aren't defects).

Frankly, I would expect them to use x-rays if they were really seeking to know for certain.

[newzjunkey]

The overpass bridges in San Diego had to be x-rayed when substandard welding was uncovered. And that was with the earthquake refits.

It was costly and a real headache for commuters. It's dull work, sure but when you consider the literal lives at risk just from the traffic load or, worse, an earthquake... the welds must be inspected. The concrete, bolts and rebar tested. It's too important. Some of these overpasses in California are multi-tiered and rise hundreds of feet in the air.

All the people involved car about is cutting corners and getting paid. Until something disasterous happens.