Abstract: A joint assembly between a tank and a base of a transformer and characterized by a clamping joint including a mounting bracket, a clip, and a bolt-nut assembly. The tank and base having adjacent inturned surfaces to be assembled by a clamping joint having a mounting bracket, a clip, and a nut-bolt assembly. The bracket is a channel member mounted on the tank inturned surface and having a web spaced therefrom. The clip having one end portion in clamping engagement with the base inturned surface and having another end portion pivotally mounted on the bracket. The bolt extending through aligned holes in the web and other end portion where the bolt is retained by the nut so as to clamp the inturned surfaces together.