HOT/General/TBT-HOT-011

Stud Welding Safety

Hot Works › General › Stud Welding Safety

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Stud welding attaches shear connectors, threaded studs, and insulation pins to steel surfaces using an arc process.
The weld gun draws an arc between the stud and the base metal, then plunges the stud into the molten pool.
Shear stud welding on composite steel decking is one of the most common stud welding applications.
The arc flash during stud welding is intense but brief, still capable of causing arc eye and skin burns.
Molten metal splash from the weld collar is ejected at high speed during each stud placement.
The welding gun is heavy and is operated repeatedly throughout the shift, causing arm and shoulder fatigue.
Stud welding on steel decking takes place at height, requiring fall protection and safe access.
Electrical cables from the stud welding unit create trip hazards across the steel deck surface.
PUWER 1998, the Work at Height Regulations 2005, and welding safety guidance all apply.
Quality control requires bend testing a percentage of studs, which involves working near the deck edge.

Arc flash and burns	The brief but intense arc flash causes arc eye, and molten collar splash burns exposed skin.
Falls from height	Stud welding on open steel decking at height exposes workers to falls through undecked areas and off edges.
Repetitive strain	Operating the heavy weld gun hundreds of times per shift causes shoulder, arm, and wrist injuries.

Don't

Wear a welding visor or tinted safety glasses to protect against arc flash.
Use leather gloves and long sleeves to prevent molten splash burns.
Ensure fall protection is in place before stud welding on elevated steel decking.
Route welding cables to minimise trip hazards across the working deck area.
Rotate operators regularly to reduce fatigue from repeated heavy gun operation.
Test weld quality by bend testing the required percentage of studs.
Maintain the stud welding unit and gun according to the manufacturer schedule.
Keep the work area clear of combustible materials that could be ignited by splash.
Brief the team on arc flash protection and the fall hazard specific to decking.
Inspect the welding cable and gun connections before starting each shift.

DON'T weld studs without eye protection against the arc flash.
DON'T allow exposed skin near the weld gun; molten splash burns instantly.
DON'T stud weld on elevated decking without fall protection in place.
DON'T leave welding cables trailing across the deck as trip hazards.
DON'T continue welding if the gun becomes too heavy to control accurately.
DON'T skip bend testing the required percentage of welded studs.
DON'T use a stud welding gun with damaged cables or loose connections.
DON'T weld studs near combustible materials without clearing or protecting them.
DON'T stand on unsecured decking sheets while operating the stud weld gun.
DON'T allow unshielded bystanders near the welding operation during arc flash.

See also: Welding Safety Awareness (Comprehensive) | Metal Decking Installation

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