You can create welds as weld points or weld lines. These objects contain not only the weld properties but also the logical connection between the connected structural parts.
You can create weld patterns using the tools in the Objects tab 
Connection objects panel.
Weld Representation
With the ASTemplate.dwt standard template, weld points are created as individual elements in the form of a pink cross, whereas weld lines are represented in the model as thick polylines.
Weld objects can store information separately for the upper and lower weld.