A puddle weld is a method of joining two pieces of metal—usually where one piece overlaps the other—by melting through a hole in the top layer to fuse it to the bottom layer.
Visually, a finished puddle weld looks like a small, circular nugget or "button" on the surface of the metal deck. puddle weld
The execution of a puddle weld requires skill and specific equipment, typically a shielded metal arc welding (SMAW) setup or, more commonly today, flux-cored arc welding (FCAW) with a "welding gun." A puddle weld is a method of joining
Unlike a plug weld, which requires a pre-punched hole, a puddle weld "burns through" the top layer to fuse it directly to the support member. How the Process Works How the Process Works These welds provide the
These welds provide the lateral "shear" strength required to help buildings resist wind and seismic forces.
Puddle welding generates significant heat and sparks. Fire prevention is paramount. Because welding is being performed on a thin metal sheet that is often the only barrier between floors, crews must employ "fire watch" personnel to ensure sparks do not ignite materials on the levels below.