Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

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

[Subject Prev][Subject Next][Thread Prev][Thread Next]
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]
Truck traffic: 	12% of total traffic
Deck condition: 	Satisfactory [6 out of 9]
Superstructure condition: 	Fair [5 out of 9]
Substructure condition: 	Satisfactory [6 out of 9]

Length of largest span: 	160.1 ft. [48.8 m]
Total length: 	1111.9 ft. [338.9 m]
Roadway width between curbs: 	56.1 ft. [17.1 m]
Deck width edge-to-edge: 	60.0 ft. [18.3 m]
Vertical clearance <> above deck: 15.4 ft. [4.7 m]
Vertical clearance below bridge: 	7.9 ft. [2.4 m]
Owner: 	State Highway Agency [01]
Year built: 	1955
Historic significance: Bridge is not eligible for the National Register <> of Historic Places [5]
Design load: 	MS 18 / HS 20 [5]
Number of main spans: 	4
Main spans material: 	Steel [3]
Main spans design: 	Truss - Thru [10]
Deck type: 	Concrete Cast-in-Place [1]
Wearing surface: Latex Concrete or similar additive <> [3]

The news reports are referring to some "heavy load" crossing the bridge before collapse, whatever that means.

Hassan Astaneh

Post your message to the list by sending it to: SEAINT-SEAOSC(--nospam--at)

The email messages sent to the list will be saved in an archive on the World Wide Web.
These archives are located at:

To contact the list owner, send your message to:

Sponsored By: Pacific Structural & Forensic Engineers Group, Inc. (PSFEG)

To unsubscribe, switch to/from digest, get on/off vacation, or change your email address, click here.