ABSTRACT
The definition of the word durability in Webster's dictionary is having the quality of lasting or enduring, not easily worn out, whereas the word permanence adds the concept of having continued existence. Accordingly, the main emphasis in this section will be on those bonded structures manufactured for long-term service. It will be important from a practical viewpoint, however, to also consider those multitudinous joined materials, which are more economically adhesive bonded, and have lesser requirements to resist weathering and stress factors.
