Heavy-Duty Arc Stud Welding with Large Diameter Studs

Stud welding as a manufacturing operation can be divided into two general categories: capacitor discharge (CD) and drawn arc. CD stud welding is most effective for smaller dimension studs and pins. These fasteners can be used for anything from electrical enclosures to insulation installation. They also often range in materials, including metals like steel, copper, aluminum, brass, and bronze. Drawn arc welding, on the other hand, is capable of installing large diameter studs and heavy-duty load-bearing connectors that can take on shear and tensile stress. Drawn arc welding is most often used in the construction of multistory buildings, bridges, and other large structures. Whether you’re using CD welding or drawn arc stud welding on your job site, Northland Fastening Systems (NFS) can help. We provide a complete selection of welding supplies, such as studs, accessories, tools for rent or purchase, and the support of our own expert technicians.

Arc Stud Welding

For manufacturers working with drawn arc stud welding and larger diameter studs, NFS supplies include fully and partially threaded studs, headed anchor studs, shear connectors, and deformed bar anchors. On special request, we can also provide custom-dimension studs for various arc welding applications.

In general, most large-dimension arc studs will meet the following specifications:

  • Sizes: Fully threaded studs and partially threaded studs are made with a diameter of ½” and lose ⅛” of length after welding. Before welding, their lengths range from ¾” to 2 ½”. Their threading ranges from ¼-20 and 1-8. Headed bar anchors range in diameter between ⅜” and ⅞”. Their length will also reduce by ⅛” after welding, but prior to a weld, will range between 1 ⅛” and 10 ⅛” After a weld, shear connectors reduce in length by 3/16″ or ⅜” in thru-deck operations. Before a weld, they are available between 4 ¼” and 10 ¼” in length. Shear connectors come with diameters of ¾” or ⅞”. Deformed bar anchors are made with diameters between ½” and ⅝”. Their lengths reduce by ⅛” after a weld and before range from 8 ⅛” and 48 ⅛”.
  • Materials: Compared to CD studs, drawn arc studs are fabricated from a smaller range of materials. Most are available in mild steel or stainless steel, although some are standardized for low carbon steel.
  • Applications: Because drawn arc studs are larger in dimension, they are typically used in heavy duty applications. This includes structural welding with thru-decking, beam connection, and composite construction for buildings, roads, bridges, and other infrastructure. Arc studs can also provide powerful, seal-tight connections that are important in shipbuilding, aerospace, and even automotive manufacturing.


If you’re working with arc stud welding for any application, you can find the type of stud, dimensions, and materials needed with NFS. Contact NFS at (651) 730-7770 or request a quote online for more information today.