Bondeking and Stud Welding

Spectrom provide a stud welding service for the applicaton of all forms of arc welded studs including:

  • Shear Connectors (up to and including 22mm diam)
  • Threaded Studs – mild and stainless steel (up to and including 24mm diam)
  • Insulation Pins and Anchors – mild and stainless steel
  • Capacitor Discharge (CD) Pins and Anchors – several alloys available
  • Wear Studs
  • Bondek supply and installation

Stud Welding can be carried out either at our premises or “On Site” as required.                                              


About Stud Welding

Stud welding is a fastening technique of metal to metal using only one side of the base material. It eliminates drilling, punching, threading, gluing, riveting, screwing, or finishing. Studwelding is a tremendous time and cost savings.

There are two (2) main types of studwelding: Capacitor Discharge (CD) stud welding and Drawn Arc stud welding (ARC).

During the CD process, the capacitors are charged to a setting pre determined on the front of the power supply. The CD gun is loaded with a weld stud and pushed into the base material under spring pressure. The tip touches the workpiece which closes the electrical circuit. Upon trigger from the CD gun the capacitors are emptied, the stud and workpiece surface from a molten material and solidfy together forming a solid weld. The welding time for CD studs is approx 3 milliseconds.

During the ARC process, the stud touches the workpiece which closes the electrical circuit. Upon trigger, the ARC gun lifts the stud off the workpiece with the help of a solenoid (magnetic coil). The main arc is initiated between the workpiece and the tip of the ARC stud. The base material and stud melt forming a molten material and they are forced back together under spring pressure creating a weld. The weldpool solidifies and cools down. The welding time for ARC studs vary from 5 to 990 milliseconds.

Spectrom can now provide a much more efficient site Stud Welding service with our fully equipped Stud Welding Trailer.


About Bondeking

Bondek Structural Steel Decking is a highly efficient, versatile and robust formwork, reinforcement and ceiling system for concrete slabs. It is a profiled steel sheeting widely accepted by the building and construction industry to offer efficiency and speed of construction. It has re-entrant ribs into the concrete slab at approximate 200mm centres and its depth is 54mm. It is available in a Base Metal Thicknesses (BMT) 0.6, 0.75, 0.9 and 1.0mm.