Ten days ago today , Chicago developer J. Paul Beitler — who once aspired to work up the world ’s tallest building — order The Chicago Tribune that governments would cease to O.K. plans for skyscraper , for care that they would become “ magnets for future act of terrorism . ”
The events of September 11th forever changed the elbow room we approach architecture and designing . In the ten years following September 11th , “ security at any price ” became the mantra of many .
designer have raise safety in tower design to unprecedented altitude — but they ’ve also managed to do so in esthetically and environmentally witting ways . adverse to Beitler ’s anticipation , skyscraper continue to protrude up worldwide , and what will presently become the tallest tower in the United States is rise up higher into NYC ’s skyline every day ; when it is complete , One World Trade Center will not only be one of the safest skyscraper in the world , it will also be one of the most environmentally sustainable . The design of One WTC represents not just how 9/11 changed architecture , but how it changed computer architecture for the better .

Here are 10 means that One WTC be that change .
10 ) Stairs
The emergency stair in One World Trade Center will be importantly wider than those called for by building standards in New York , and will let in additional exit fix . The supererogatory space will allow for evacuation to be carried out more efficiently in the event of an emergency . WTC architects have also designed a readiness of stairwells exclusively for purpose by firefighters and delivery force .

9 ) Air supply
zephyr circulating through the towboat will be drawn from the exterior using machines that pull in in strain from the top of the tower , where it is clean . Inside emergency step fountainhead , the air will be kept at a higher pressure level than the outside air to help keep them absolved of smoke in the outcome of a fire .
- biologic and chemical air filter

The ventilation system for each floor of 1 WTC will be equip with a dual - filtration system that will clear up the air , not just of particulates in the natural - air supplied from outside , but of chemical substance and airborne threats as well .
7 ) Reinforced foundations
The first 19 taradiddle of 1 WTC are built like a dugout , fort with a 185 - groundwork , reinforce concrete base to protect the structure from the military unit of a car bomb . ( Image viaNYTimes )

6 ) Subtle protection
But as NY Times ’ Henry Fountain puts it , refinement is beginning to grovel back into security measure . Jersey barrier have been replace with street article of furniture , plantings or other landscaping features that are esthetically pleasing , but can still keep a car from labor into a building , for example . Ten eld after 9/11 , engineers are looking for new and creative ways to balance concerns over security , aesthetics , and the environment .
5 ) Green cool and irrigation systems

And in true “ elusive security system ” fashion , One WTC is said to be “ the most environmentally sustainable project of its sizing in the world . ” The tower will have , for instance , a rainwater collection and recycling schema . The rescued piss will be used in the tug ’s cooling and irrigation systems . But how is this connect to protection ? When air is continuously circulated from outside — as it will be in 1 WTC — it must be continuously cool down or heated as well , typically at considerable disbursement ; using reclaimed water system in the cool process account for both environmental and safety concern .
4 ) Elimination of accelerants as heat elements
The tower will also forego the use of oil and natural gas — ground heating elements ( which are also accelerants that can fuel and animate the spread of fervour ) wherever possible ; the construction will instead by heated by steam as part of a 4.5 million watt construction fuel cell ( dissipation steam will also be used to father electricity ) .

3 ) fix , placement , location
One of the biggest new security measures does n’t involve fancy filtration system or new architectural ideas — it simply increases the distance of One WTC from the street . The novel tower will stand at an average of 90 feet from all surrounding streets ( the previous pillar were positioned an norm of 25 base from the street ) ; at its closest full stop , One WTC will be 65 feet away from West Street .
2 ) Glass

Another good instance of nuance in security is the extensive use of glass in the fresh World Trade Center . The advanced architectural era is all about glass , weak , and receptivity — qualities that one does not typically associate with surety and persuasiveness . ( Photovia )
One WTC , however , manages to achieve the lightheaded and impractical timber of a glass box , while maintaining the military strength and security of a fortress by being what architecture prof Garth Rockcastle denote to as “ a concrete fortress in glass clothing . ” The execution of good time - resistant spyglass and plastics at One WTC will protect the towboat and reduce its operating costs , all while providing a gumption of nakedness .
1 ) Concrete

As we mention above , concrete fortifies the base of One WTC , protecting it from bombs and impacts . But the core of 1 WTC — what its architect , David Childs , calls “ the plaza spine of the construction ” — is encased in several feet of a novel expression of concrete that is roughly three times as firm as typical concrete ; all stairwell are reinforce with 3 - foot - buddy-buddy concrete bulwark ; and concrete will be used to incase and protect everything from sprinkler systems , to emergency risers , to communication systems .
extra recitation

Renew NYC Freedom Tower Fact Sheet
“ The Age of the Eco - Citadel ”
“ How Has Skyscraper designing switch Since 9/11 ? ”

“ Did 9/11 Change The means We build up ? ”
Top imagevia
Additional reporting by Keith Veronese

9/11ArchitectureEnergynew yorkNew York CityWorld Trade Center
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