Location: Chicago, Illinois
Building Description: Very old five-story wooden apartment building
Problem: Fire burned building to the ground
Task: Recommend a material for a new building
Budget: $150 million

Special Notes: "It doesn't take a genius to figure out that this apartment building burned to a crisp because it was old and made of wood. I don't want to witness another disaster like this one ever again! I've decided to build a 50-story deluxe apartment building in place of the old one, but I don't know what material to use. Can you help me?"
-- Mayor, Chicago

What material will you use to build the mayor's new skyscraper? Remember, the new building will be very tall and heavy, so the material you choose will be under a lot of compression.

Stone	Steel	Steel-Reinforced Concrete