Which type of joints are typically formed by folding and interlocking edges?

The correct choice identifies sheet metal joints, which are commonly formed when the edges of sheet metal are folded and interlocked. This type of joint is typically used in applications involving thin metal sheets, such as in ductwork, automotive bodies, and various structures where lightweight and strong connections are necessary.

Sheet metal joints utilize techniques like flanging, bending, and hemming to create strong connections without the need for additional fasteners or welding. The interlocking nature of these edges allows for effective load transfer and enhances the structural integrity while maintaining a streamlined appearance. This method is also beneficial because it can facilitate easier assembly and disassembly compared to joints that require adhesives or welding.

Understanding the context of sheet metal joints is essential, especially in engineering applications where weight, strain, and manufacturing efficiency are critical factors.