The Silver Bridge Disaster
How the Silver Bridge and the Hi-Carpenter Bridge differed from other suspension bridges in one crucial aspect.
The Three Sisters Bridges
Why it's safer to incorporate more eyebars than are actually needed, to bear the weight of the bridge.
A New Wonder Material - or Not?
How the use of a new high-strength steel led to mistaken assumptions about safety.
The Weakest Link
How an investigation identified where the failure had occurred. A recovered eyebar is examined up close.
Trigger Factors
How increasing traffic and freezing temperatures triggered the failure. An eye-witness account of the collapse.
The Failure of Eyebar 330
How an undetected 3mm crack formed over 39 years weakened the eyebar, and a forensic deconstruction of what happened during the accident.