★ The Twin Towers ★
◆ Andy Echeverria ◆
The Twin Tours
The Twin Towers
Location - New York City.
Height - 110 stories tall .
Date completed - December 23
Engineer or architect - Port Authority
materials - External Walls , Interior Floors Tubes .
Destroyed - September 11
Engineering challenges and solution
Engineer or architect
primary building materials
Burj Khalifa required 330,000 cubic meters of concrete .
31,400 metric tons of steel rebar were used to reinforce the concrete.
other major materials used are glass, silicone, and aluminum .
Empire State Building
Engineer or Architect
Main contractor -Starrett Brothers and Eken
John Burgee & Philip Cortelyou Johnson