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8.4. Plug and Slot Welds

8.4.1. When are plug and slot welds used?

Plug and slot welds are permitted for the transfer of shear force only. As such, they are sometimes used to transmit shear in lap joints, to join components of built-up members, or to prevent buckling of lapped parts. Their design and usage is covered in  AISC Specification Section J2.3.