Tuesday, May 01, 2007

Oakland overpass/WTC

An unexpectedly large fire on a concrete overpass in Oakland weakened the structural steel used in the construction, leading the collapse of the overpass.  The only insulation for the steel was asphalt, which melted under the heat, exposing the steel to the full force of the fire.  The corresponding insulation around the steel in the WTC was knocked off by the force of the plane crashes, something the structural engineer involved admitted they did not anticipate.  I have nothing more to say.