We'd like to use analytics cookies to understand which symbols people look up, so we know what to research next. They are not used for advertising and we set none of them unless you say yes. What we store.
Two stacked arcs.
The welding symbol for a surfacing weld, depositing metal on a face rather than joining two members.
Specifies a surfacing weld, depositing metal on a face rather than joining two members.
Contexts: Technical drawing
Not a joint at all: it builds up or hard-faces a surface, which is why it is the only preparation symbol with no second member implied anywhere in the drawing.
Contexts: Technical drawing
Two shallow arcs stacked one above the other, sitting on the reference line.
A fuller structured visual breakdown is not yet documented for this symbol.