Arc stud welding uses cylindrical head welding nails with arc ignition joints at the bottom. It is welded to the surface of the flange of the steel beam with a special welding gun and combined with the concrete floor to form a shear connector. It is the core shear member of steel-concrete composite floor, composite beam, and bridge deck systems, and is widely used in high-rise steel structure buildings and bridges. Equipped with ceramic ring protection.