Weld Stud
Studs & Rods · weld stud · drawn arc stud · CD weld stud · shear connector
Definition: A weld stud is welded to a base plate or beam — by drawn-arc, capacitor discharge, or friction welding — to provide an attachment point.
Anatomy
■ Head■ Shank■ Threads■ Point
Governing standards: AWS D1.1 · Manufacturer specified (no universal standard)
Common Sizes
| Inch | Metric | Head width | Head height |
|---|---|---|---|
| 1/4-20 | M6 | — | 1–4 long |
| 3/8-16 | M10 | — | 1–6 long |
| 1/2-13 | M12 | — | 1–8 long |
Representative sizes. Full dimensional data lives in the standards listed below.
Grades & Strength
| Grade | Material | Tensile (psi) | Marking |
|---|---|---|---|
| Low carbon steel | carbon steel | — | For drawn arc |
| Stainless | stainless steel | — | For stainless plate |
Materials
- Low carbon steel
- Stainless steel
- Aluminum
Pros & Cons
Pros
- One-sided, fast attachment
- No through-hole or leak path
- Strong weld bond
Cons
- Needs stud-welding equipment
- Not removable
- Requires clean base metal
Typical Uses
- Composite beam shear connectors
- Anchor points on plate
- Cable tray and pipe supports
- Insulation pins
Alternatives & Related
- Weld Nut — Welded-on female thread instead
- Threaded Rod — Where you can through-bolt
Where to Buy
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FAQ
How is a weld stud attached?
Drawn-arc stud welding strikes an arc that melts the stud end and the base, then plunges the stud home. CD welding uses a short capacitor discharge for thin sheet.
Shear connector vs threaded weld stud?
A shear connector has a larger head welded to composite beams to bond concrete to steel; a threaded weld stud provides a bolt point.