SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/weld-joint-lap

What defines a lap joint?

The surfaces of the two pieces overlap.

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  1. The surfaces of the two pieces overlap ✔
  2. The edges meet in one plane
  3. The pieces meet at 90 degrees as a T

Why: A lap joint is two overlapping pieces welded where they meet. Thicker material needs more overlap.

Huh, didn't know that: Miller says overlap should be set by the thickness of the two pieces.

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What do you call birds who stick together? Vel-crows.
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References

Answer: The surfaces of the two pieces overlap. A lap joint is two overlapping pieces welded where they meet. Thicker material needs more overlap.

  1. A Guide to the 5 Basic Types of Weld Joints (Miller) www.millerwelds.com/resources/article-library/a-guide-to-the-5-basic-types-of-weld-joints-and-tips-for-improving-results
    A lap joint is formed when the surfaces of the two pieces overlap one another.
    Checked 2026-10-10.

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Trades & ShopWhich joint design is the most common in all applications, per Miller?Trades & ShopIn a butt joint, how do the two pieces meet?Trades & ShopTwo pieces joined at 90 degrees to form an L make which joint?

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