How does a slot weld differ from a plug weld?

symbols for fillet welds as well as for plug and slot welds Welders slot-weld symbol, but context should make the symbol's intention clear

The plug weld symbol is a simple rectangle It is used on welding diagrams to indicate where a plug weld is needed and what size it should be

plug weld and slot weld Proper technique is to initiate the arc in the center and deposit weld metal in spiral layers

plug and slot weld Plug and slot welds joint overlapping pieces of metal You can see this symbol on either side of the reference line but not on both sides In