The most surprising fact? Puddle welding has been used in — just under a different name.

The result looks like a cluster of fish scales — or, less charitably, a row of melted coins. It is slow, crude, and oddly effective.

moving before the puddle freezes. That creates a “wagon track” — a groove full of slag and porosity. Wait until the red glow fades to black.

Because puddle welds secure critical structural diaphragms in commercial buildings, they must adhere to rigorous code requirements. AWS D1.3 Compliance