domingo, 20 de enero de 2013

The Pentagon has double toilet facilities that is needed for a builidng its size



The Pentagon, located in Arlington (Virginia), is the headquarter of the United States Department of Defense.
When World War II broke out in Europe, the headquarters of the United States Department of War was spread out in different temporary buildings such as the Greggory Building, the National Mall. The situation was unacceptable for secretary of War Henry L. Stimson, and that is what he told President Franklin D. Roosevelt. It was decided to build a new building from scratch; it had to be no more than four stories tall with a minimal amount of steel, which implied the building would be sprawling over a large area. Steel was in short supply during WWII. The originally chosen site had a roughly pentagonal shape, and that is how it was designed.  But president Roosevelt suddenly got concerned that the new building could obstruct the view of Washington D.C. from Arlington Cemetery. Finally, the obsolete Hoover Airport location was selected. But, after changing the site, the design was maintained because a major change would have been very expensive. Nevertheless, it was modified to a perfect shaped pentagon. Part of the attached neighborhood, Hell’s Bottom, was bought for completing the space needed, including some pawnshops, some factories and 150 houses making 280 acres (1.1 km2).



Works begun on September 11, 1941. The reinforced concrete structure was covered with Indiana limestone facades.  680,000 tons sand from the Potomac River were used for the construction. The necessity of having the headquarters finished rush the process to an unbelievable speed, rushed even more, after Pearl Harbor attack (December 7 1941)
The Pentagon has double the standard toilet facilities due to the state of Virginia’s racial laws at the time of it construction. On each floor there were double toilet facilities separated by gender and race. However, president Roosvelt ordered to remove the “Whites Only” signs before the building was used and during a long period of time, it was the only building in Virginia were segregation was not allowed. 


The building was completed by January 15, 1943. It was the largest building in the country, housing more than 17 miles of corridors. Normally, it would have taken years, but it was designed and executed in just 16 months. 

Aerial view of the two first sides

sábado, 5 de enero de 2013

MEGHLAYA BRIDGES





Meghalaya is a state in the north east of India. It is a heavily forested region very rainy. It is said to be the wettest place in the world, with an average annual rainfall as high as 1200cc in some areas; the town of Cherrapunji holds the world record for most rain in a calendar month. This means that during the raining season, those streams that are spread out through all the area, become indomitable torrents that destroy everything in their way, including bridges. That is why the inhabitants developed, centuries ago, an amazing way to create bridges that would withstand the flows: Natural living bridges made with directional roots.
If you want to see with your own eyes how they work, I strongly recommend the following video, extracted from a chapter, dedicated to the rivers, of Human Planet, an awesome BBC documentary. Absolutely all the chapters of Human Planet are amazing; I really encourage you to see them.  


 

martes, 1 de enero de 2013

DARUMA-OTOSHI, a New Demolition Method recognized as an "Innovation Award Finalist" in the 2012 CTBUH Awards Program.



DARUMA-OTOSHI, a New Demolition Method recognized as an "Innovation Award Finalist" in the 2012 CTBUH Awards Program.

Demolishing tall buildings in the middle of a city is becoming an everyday occurrence in big cities such as Tokyo, where the lack of space forces city planners to reinvent the urban core. It is becoming an issue impact on the environment and re-use of materials.  Kajima Corporation has developed a method that addresses and improves over traditional demolition methods. Deconstruction versus demolition. The “Cut and Take Down Method” consists on: “temporary columns are used around the structural column grid, the existing columns are replaced, and then hydraulic jacks are placed where the existing columns were and the building can be lowered to the next floor plate where the process is repeated”

"Daryna-Otoshi" is an old Japanese game that consists in taking the bottom pieces of a toy without dissasembling it. 

“There are so many quiet revolutions going on in tall buildings. Top-down construction is one such revolution, and here is another—bottom-up demolition.”
- Antony Wood, 2012 Awards Juror, CTBUH

These two videos clearly show how this amazing method works: