The McCormick Center in Chicago and the Sight and Sound Theater in Pennsylvania are
examples of steel structures collapsing. The theater was fire protected using drywall and
spray on material. The Meridian Plaza didn't collapse after a long fire but firefighters
evacuated the building when a pancake structural collapse was considered likely. Other
steel-framed buildings partially collapsed due fires one after only 20 minutes.
The steel framed McCormick Center was at the time the World's largest exhibition
center. It, like the WTC, used long steel trusses to create a large open space without
columns. Those trusses were unprotected but of course much of the WTC lost it's fire
protection due to the impacts.
"As an example of the damaging effect of fire on steel, in 1967, the original heavy steelconstructed
McCormick Place exhibition hall in Chicago collapsed only 30 minutes after
the start of a small electrical fire."
http://www.wconline.com/CDA/Archive/24ae78779d768010VgnVCM100000f932a
The McCormick Place fire "is significant because it illustrates the fact that steel-frame
buildings can collapse as a result of exposure to fire. This is true for all types of
construction materials, not only steel." Wrote Robert Berhinig, associate manager of UL's
Fire Protection Division and a registered professional engineer. He also discusses UL's
steel fire certification much more knowledgably than Kevin Ryan. He is an example of
one more highly qualified engineer who supports the collapse theory.
http://www.iaei.org/subscriber/magazine/02_d/berhinig.htm
About 2 years later the NYFD was concerned that a steel framed building that partially
collapsed during after a gas explosion might collapse entirely due to the resulting fire.
http://www.usfa.fema.gov/downloads/pdf/publications/TR-068.pdf
The Kader Toy Factory also collapsed due to fires. It had a steel frame.
http://www.wsws.org/articles/2003/may2003/kade-m16.shtml
http://en.wikipedia.org/wiki/Kader_Toy_Factory
You can find more examples here, at the bottom of the page:
http://www.debunking911.com/firsttime.htm
Many Deniers seem to “forget” the two planes, or the construction style of the buildings.
Some even dare compare a concrete building to a steel-frame building.