Structures - Solids, Frames and Shells, Oh My!

As we have seen in our past lessons, structures are EVERYWHERE! Structures have a shape and have a function. The function of the structure determines the form of the structure.  Structures need to be stable in order to support the weight or load that they carry.  Take a look at what happens when a structure isn't so stable!





There are three categories of structures that are quite different though most structures are a combination of types. Let's take a look!
                                                      



Shell Structure
An igloo is a shell because it is hollow and protects what is inside.  It relies on curves or arches to provide it strength.

Frame Structure
Examples of frame structures include the Eiffel Tower, some bridges, electrical towers and the roof of most houses. Frames are made out of connected parts in a certain arrangement.

Solid or Mass Structure
These structures are made from strong materials and are formed in solid pieces.  Castles, caves and dams are examples of solid/mass structures.




Let's take a look at some architecture and see which types of structures they are (or if they are combinations!)

Today we will be building experimenting with all three types of structures.  You will be working as part of a team so be sure to think of what good group members do (also known as Helpful Citizens! See the poster in the room?!)

Time to get working!