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RE: AP: Wash. State bridge collapses into Skagit River; sends vehicles, people into water

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5/9 and 6/9?

That's satisfactory?


T. William (Bill) Allen, S.E. (CA #2607)
University of Southern California, M.S.C.E., 1983
University of Texas at El Paso, B.S.C.E., 1977

Consulting Structural Engineers
32302 Camino Capistrano, #206
San Juan Capistrano, CA 92675
V (949) 248-8588•F (949) 209-2509

-----Original Message-----
From: seaint-seaosc(--nospam--at) [mailto:seaint-seaosc(--nospam--at)] On 
Behalf Of Abolhassan Astaneh Sent: Thursday, May 23, 2013 11:30 PM
To: seaint-seaosc(--nospam--at)
Subject: Re: [SEAINT-SEAOSC] AP: Wash. State bridge collapses into Skagit 
River; sends vehicles, people into water

Last post of the night.  Here is a radio interview with a witness who 
actually saw a semi-truck with a wide and tall load hit the bridge (seems 
it has hit the portal bottom strut ) at the entrance  to truss spans) and 
then he says he saw the bridge span collapse right after.  Here is the 
radio station:

One last item, the sites indicate the clearance below the deck as 7.9 ft.
That is the clearance at high level of water.  The collapse photos show 
that the clearance between the deck and the river water is about 15-20 
feet.   Still not very high clearance for the deck and cars on it to drop.

Hassan Astaneh

On 5/23/2013 10:36 PM, Abolhassan Astaneh wrote:
> Here is a summary of inspection and rating information and basic
> information  for I-5 Over Skagit  River Bridge, a 4-span thru truss
> bridge , one span of which collapsed on May 23. The info is from
> Average daily traffic:     70,526 [as of 2007]

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