Identify Problem/Needs:

Engage

Set parameter of the focus. Possible "Guiding Questions:"

What type of bridges are there?
What type of bridge is near us?
Why are there different types of bridge structures?
What purposes do bridges serve?
What might cause bridges to fall down?
What kind of materials are used to build bridges?
Are there environmental factors to consider when building a bridge?

Frame the idea . Sample "Problem Statement:"

Bridges are built to support as much weight/mass as needed for its particular purpose. Civil
engineers work to design and build bridges with as few materials as possible to keep costs low,
meeting or even exceeding the necessary specifications. Using a minimum of materials needed,
you will design and construct a bridge that can support a maximum load before it collapses