Learning from the collapse of the World Trade Center towers, architects and engineers are beginning to design new features to make tall buildings safer.
Klemencic says engineers seeking good models of such a balance can look to England, where ongoing tension over Northern Ireland have forced a heightened vigilance against terrorist acts. In many of England's newer buildings, says Klemencic, the lower steel beams are reinforced in concrete. Steel is strong, but can bend under intense temperatures. Concrete holds up longer against heat, but can crack and break under extreme temperatures. Using both adds some protection against collapse during prolonged fire.
Thanks to Abhijeet Chavan
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Rowan University's Department of Geography, Planning, & Sustainability
HUD's Office of Policy Development and Research
This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.