A building that is one of the most challenging engineering bridge. The length and strength of the bridge, there are limits.
a bridge pillar on the road or bridge cables that hold or hanging bridge components are faced with the stress caused by two major forces.
Types of compression and tension
If I can spare design, construction, operation or management of the bridge to meet the challenges mentioned above.
I will use the material to suit the strength to get up and have to withstand more than a few times to get to safety.
Because safety must come first.