Landing ever larger vehicles on the Martian surface has posed many challenges over the years due to it’s extremely thin atmosphere which provides very little air resistance to slow down incoming spacecraft. So, in an effort to increase drag forces and allow for heavier lander missions, NASA is testing out a a totally new saucer shaped re-entry vehicle.
Structural steel in bridge design has one fatal flaw — bridges are usually over water, often over salt water, making failure through corrosion almost inevitable.
Even more frustrating, steel bridges usually corrode and weaken at the one place where inspection is costly and difficult, the gusset.
New York-based, HNTB Corp. national chief bridge engineer Ted Zoli had a better idea. Instead of doing what every engineer does and just focus on materials, he thought, why not focus on the design and try to eliminate some of the inevitable costs associated with bridge maintenance?