Skyscraper Video
Interesting Facts
Part 1
 4.5 million square feet space in the Lagoa Japan skyscraper equal
to the space of the Pentagon
 Japan builds skyscrapers no space to build real estate prices high.
 Forces that bring down skyscrapers are
o Earthquakes
o Forces of gravity
o Wind
o Insanity of man
 Ottis elevators were the first to use safety brakes
 1885 steel cage structure first super structures outside walls hung
off each level of building.
 26,000 tons of steel in the Patronous tower
 Patronous tower is 27 feet taller than the Sears tower in Chicago.
 Mexico City earth quake killed 10,000 people left 100,000
homeless
 3,000 structures were damaged, 400 collapsed
 Some buildings swayed 6 feet which is 3 times what is safe
 Lagoa tower 1.5 million cubic feet of concreate used in the matt
slab foundation
 Patronous 400 feet for the central piles
 75,000 tons of concrete 3 day round the clock pour.
 Dampers reduce swaying motion in buildings like a shock absorber
which can absorb 3 times more energy than not having them.
Skyscraper Video
Interesting Facts
Part 2
 Wind effects all skyscrapers, taller the building the more it is
affected.
 Sears tower withstand 75 mph winds
 JR central tower can sway 4.5 feet in 175 mph winds
 Petronous sway 3 feet in 90 mph winds
 Petronous tower bridge with support helps with sway
 30 hours to place bridge
 Dampers are used for torque reduction twist at 45 degrees in any
direction
 JR central round tower originally square done to reduce TV
ghosting
 Multi-million dollar change
 Used pre cast concrete ceramics exterior tiles
 800 feet tall
 Insanity of man can bring down towers
 Trade center tower fire trap
 Acted like a chimney
 Fire and water system went offline
 Pentronous 600 pounds pressure to top of building to get water.
 Used tricking down to lower floors to reduce pressure
 3 floors are maintenance floors.
 7 years to build JR central cost 1 million per day
 Team job exercise go over what needs to be done
 Ottis has vertical and horizontal elevators
 Mile high building is it possible?
 Use lighter materials hybrid ceramics, carbon fibers, plastics
 Retail/ Apartments/ Travel with in building one stop shopping.