In that picture of the joints it's definitely solder.
Brazing will never look like that.
In 4 feet you've got 4 uprights so strength wouldn't be an issue.
That could be a prototype or maybe they wanted copper's corrosion resistance.
12" x 1 1/2" or 12" x 2" are common bike sizes.
Grounded copper to minimize radio interference that a steel cage might cause?
10-12-14, 03:53
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