Due to uneven heating & cooling of the members during the welding, the members may distort resulting in additional stresses.
Skilled labor and electricity are required for welding.
No provision for expansion and contraction is kept in welded connection & therefore, there is possibility of racks.
The inspection of welding work is more difficult and costlier than the riveting work.
Defects like internal air pocket, slag inclusion and incomplete penetration are difficult to detect.