Automatic Weld Symbols
Note: You cannot create new
weld bead components, but you can edit weld bead components created prior
to SolidWorks 2011.
When you create a weld bead, a weld symbol is automatically attached
to the weld bead component in the assembly.

To add more detailed specifications to
the default weld symbol:
In the assembly document or in a drawing document,
right-click the symbol and select Properties,
or double-click the symbol.
Specify the dimensions, symbols, and other options
that you want to include, and click OK.