This is frequently used in all kinds of work, which may be single- fillet lap joint or double fillet lap joint.

This tee joint is used on ordinary plate thickness up to 0.5mm.

This tee joint is used for heavy plate thickness up to 25.40mm.

It can be used on plate thickness from 9.5mm to 16mm and can withstand more severe load than plain tee joint.

This tee joint is used for more severe load condition and generally used on plate 25.40mm or heavier if welding is to be done from one side.