How are riveted lap joints made watertight().
A.
The faying surfaces are coated with white lead(or similar product)before the rivets are set
B.
A sealing weld bead of 1/8 or less pitch is run along the plate edge
C.
The plate edge is split close to an adjacent plate and mechanically forced into contact with the adjacent plate
D.
A properly riveted joint will be watertight; any leakage is stopped by setting up on the rivets