Big Dig

[Gene Kim-Eng]

"The collapse of the ceiling structure began with the failure of a single steel hanger that held up the panels. The failure of that 
panel set off a chain reaction that caused other hangers to fail and sent 12 tons of concrete to the roadway below"

Regardless of whether the single hanger failure can be traced to bad procedure or not following good procedure, no single point 
failure should ever lead to a catatrophic event.  Do a search on "factors of safety."

Gene Kim-Eng



----- Original Message ----- 
From: "Peter Lewicke" <plewicke at yahoo.com>


> This appears to have been an engineering
> design error, rather than a documentation problem.