Deciphering Weld Symbols

Plug welded joints are used- plug slot weld Plug welds are essentially round welds that are made inside an existing hole, most commonly in one piece of metal The purpose? To weld that plug and slot weld It is, in essence, another practical limit on fillet weld size This is discussed in more detail later Plug and Slot Welds SCM specifies the effective

plug slot weld To enable thicker plate to be joined by 'spot welding' a circular or elongated hole may be machined through the top plate, enabling either a plug or a slot weld