Can weight reduction be optimized in automobile superstructures?

[ruzfactor]

someone please explain the phrase "properties optimised for weight reduction" in case of auto body and spaceframes.

Also please refer some links to some data on service conditions of auto body.
Thanks in advance.

 

[carsy7]

Assuming we only want the lightest components and do not care about cost. ..I believe it comes down to density and volume. Making components with the smallest volumes possible out of materials with lightest densities are the major properties. Keep in mind components are also dependent on manufacturing processes and other factors