lock seam

lock seam, lock joint

A joint or seam in sheet-metal roofing; the two edges are bent over in the form of hooks which are inserted in each other; then they are dressed down to form a seam.
References in periodicals archive ?
The joining of the materials involved the adoption of a 3D Lock Seam structure, where the steel panel and aluminium panel were layered and hemmed together twice.
3) Technology to control thermal deformation: adoption of adhesive agent with low elastic modulus and optimized position of the 3D Lock Seam.
A heavy-duty threaded base plate is joined to the can with a rolled leak-proof lock seam.