Structures in nature have influenced the construction work of man. Sometimes the natural world provides a basis for manmade structures in terms of materials, form, and construction concepts. Explore the sets of photos below to determine what the relationship is between the natural and manmade structures.

A pile of rocks is like a ...	pyramid.
A tree trunk is like a ...	column.
A tree branch is like a ...	beam.
A den or burrow is like a ...	tunnel.

STRUCTURAL CONCEPTS

Structures in Nature  More Structures in Nature Beam & Column Structures  Arch Structures  Cantilever Structures   Other Structures Bridge Types - Beam  Bridge Types - Arch & Suspension