When inserting a welding section, select from the drop-down list the type of surface of the weld:

	Flat
	Convex
	Concave

When inserting a welding symbol, select from the drop-down list the type of backing strip, if any:

	None No backing strip required.
	Permanent backing strip The application of a permanent backing strip is required.
	Removable backing strip The use of a removable backing bar is required.