Yeah, no. In reading up on this, it's a little bit half truth.
https://www.straightdope.com/columns...radioactivity/
https://www.quora.com/Why-cant-steel...t-is-its-worth
In the 60's it had a little more value. But now they can make it, and I'm thinking testing devices don't take much steel. I'd be leaning towards beams not being of much use in the low radiation field, as they'd have to be melted.
It is interesting why it's considered low radiation. There is some truth to it, but a lot of it was hyped up. I would think there'd be enough pre-1946 cars around that would do the job for a while.
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