Design a box that will contain a 4 in. × 6 in. × 3 in. volume. The box should be produced from two pieces of sheet metal and require no tools or fasteners for assembly. This is an open-ended problem with a wide variety of answers. Students should consider the blank shape, whether the box will be deepdrawn or produced by bending operations (see Fig. 7.68), the method of attaching the parts (integral snap-fasteners, folded flaps or loosefit),

and the dimensions of the two halves are all variables. It can be beneficial to have the

\students make prototypes of their designs from cardboard. 7.100 Repeat Problem 7.99, but the box is to be made from a single piece of sheet metal.

This is an open-ended problem; see the suggestions in Problem 7.99. Also, it is sometimes

helpful to assign both of these problems, or to assign each to one-half of a class.