.@BrowningMachine first learned of these when I was 7 or so. Wanted one ever since. See also http://www.rogerdean.com/architecture/
@BrowningMachine @random_eddie turns out that if the concrete is fresh, framing nail guns CAN m̶e̶l̶t̶ nail into s̶t̶e̶e̶l̶ concrete beams.
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