Are these buildings made of steel?

Question

The Sears Tower in Chicago, Illinois. The Key Tower in Cleveland, Ohio. Chase Tower in Indianapolis, Indiana. Also the IDS Center in Minneapolis, Minnesota. Also if you could tell me some information about those buildings.

Answer 1

Answerer one is correct that steel is just one component in all of these buildings. Each one undoubtedly also makes use of concrete, as does just about every other skyscraper in the world, and other materials. I do know that the Sears Tower uses black aluminum in its facade, and the Chase Tower uses granite in its facade, but that's not saying much, as each of these buildings probably include some of these materials.

What sort of other information are you looking for? Each one has a wikipedia entry that may be useful to you:

Sears Tower: http://en.wikipedia.org/wiki/Sears_tower
Key Tower: http://en.wikipedia.org/wiki/Key_Tower
Chase Tower: http://en.wikipedia.org/wiki/Chase_Tower_%28Chicago%29
IDS Center: http://en.wikipedia.org/wiki/IDS_Center

These websites also give some statistics on the buildings you're interested in:
IDS Center: http://www.citiesarchitecture.com/Building/411/IDS_Center.php
Chase Tower: http://www.aviewoncities.com/building/chasetower.htm
Key Tower: http://www.emporis.com/en/wm/bu/?id=121788
Sears Tower: http://www.pbs.org/wgbh/buildingbig/wonder/structure/sears_tower.html

Answer 2

Steel is also used along with so many other building materials.