In memorium WTC

Tujuh tahun berlalu sejak peristiwa tumbangnya gedung kembar WTC, tulisan ini tidak akan membahas latar belakang terorisme, perdebatan politis mengenai peristiwa tersebut, hanya mencoba mengenang sebuah karya arsitektur yang berakhir tragis. Sebagai seorang arsitek apakah anda pernah membayangkan bahwa hasil karya anda akan dihajar dua pesawat dan runtuh? Apakah spesifikasi gedung harus di perbaiki hingga taraf ekstrim seperti itu?
Beberapa fakta mengenai WTC dan 911 nya sering dihubung-hubungkan silahkan percaya atau tidak.
Mari Kita kenang WTC secara arsitektural.

Di rancang oleh Minoru Yamasaki



Sumber Foto http://911.yweb.sk/images/wtc/wtc8.jpg


Sumber foto www.freedomfiles.org

World Trade Center September 11, 2001 Photo by: Steve Spak

sumber http://vincentdunn.com/wtc.html
Penjelasan mengapa gedung ini runtuh

Detil Curtain Wall WTCBeberapa data teknis struktur :



Height: 1,368 and 1,362 feet (417 and 415 meters)
Owners: Port Authority of New York and New Jersey.
(99 year leased signed in April 2001 to groups including Westfield America and Silverstein Properties)
Architect: Minoru Yamasaki, Emery Roth and Sons consulting
Engineer: John Skilling and Leslie Robertson of Worthington, Skilling, Helle and Jackson
Ground Breaking: August 5, 1966
Opened: 1970-73; April 4, 1973 ribbon cutting
Destroyed: Terrorist attack, September 11, 2001

The Structural System

Yamasaki and engineers John Skilling and Les Robertson worked closely, and the relationship between the towers’ design and structure is clear. Faced with the difficulties of building to unprecedented heights, the engineers employed an innovative structural model: a rigid "hollow tube" of closely spaced steel columns with floor trusses extending across to a central core. The columns, finished with a silver-colored aluminum alloy, were 18 3/4" wide and set only 22" apart, making the towers appear from afar to have no windows at all.

Also unique to the engineering design were its core and elevator system. The twin towers were the first supertall buildings designed without any masonry. Worried that the intense air pressure created by the buildings’ high speed elevators might buckle conventional shafts, engineers designed a solution using a drywall system fixed to the reinforced steel core. For the elevators, to serve 110 stories with a traditional configuration would have required half the area of the lower stories be used for shaftways. Otis Elevators developed an express and local system, whereby passengers would change at "sky lobbies" on the 44th and 78th floors, halving the number of shaftways.

(Taken from www.skyscraper.org)

Sumber :http://www.civil.usyd.edu.au/wtc.shtml

Peristiwa ini telah membawa pemikiran dan standard keselamatan baru pada gedung, baik dari segi keselamatan pengguna gedung maupun pendekatan desain gedung tinggi secara keseluruhan.