slot weld - Welding Symbols Explained online slot 888

It must be used in combination with a groove weld symbol to avoid mix-up with a plug or a slot weld. An ‘R’ may be put inside the backing symbol if the backing shall be removed after welding.

Plug Weld or slot weld: It is used for attaching flat plates using one or more holes or slots in the top part and then filling with filler metal to fuse the two parts together.

Slot Weld: The slot weld symbol is similar to the plug weld symbol but with a long oval shape instead of a circle to indicate the slot.