Replies

1. 
   davidmeiland | Nov 04, 2009 02:58am | #1

   Great link, well worth reading.

2. 
   ruffmike | Nov 04, 2009 03:35am | #2

   Been following that closely, my wife just drove accross a few minutes ago. I drove across about 45 minutes before the colapse in '89.

   Haven't looked at the link yet, are they going to try and go after the original fixers for some cash back, I think they got a nice price for that work.

                               Mike

       Small wheel turn by the fire and rod, big wheel turn by the grace of god.

3. 
   ruffmike | Nov 04, 2009 03:44am | #3

   I like the photo of the ironworker torquing with his foot.

   That'll hold 'er.

   View Image

                               Mike

       Small wheel turn by the fire and rod, big wheel turn by the grace of god.

   
   

   ---

   Edited 11/3/2009 7:44 pm by ruffmike

4. 
   Mike_Mills | Nov 05, 2009 01:46am | #4

   After the repair they need to proof load the structure.  Have everyone park their cars, bumper-to-bumper across the full span! 

   Oh yeah, they do that every weekday, twice a day.

   Hmm,.. how do we conjure up a magnitude 8.0 earthquake as a test environment?

1. 
   cabanillas3 | Nov 06, 2009 12:47am | #5

   When they had bridge days on the Golden gate (I think twice - before it opened and on the 50th anniversary) the number of people was so high that the mass was higher than the normal loading for cars. The load was so high that it flattened out the normal arch of the bridge.I'm not sure I would want to be one of the people walking around on the cantilever section of the bay bridge, though.jose c.
   --
   "Though I don't think" added Deep Thought "that you're going to like it."

1. 
   reinvent | Nov 06, 2009 06:36pm | #9

   I read that story. They were watching it closely while it was covered with foot traffic. They said the arch of the span was deflected down 6 feet at the peek of activity.

2. 
   Dinosaur | Nov 06, 2009 02:57am | #6

   All they gotta do to bring that puppy down is have about 10,000 soldiers march across it...in step.

   Dinosaur

   How now, Mighty Sauron, that thou art not broughtlow by this? For thine evil pales before that whichfoolish men call Justice....

1. 
   Mike_Mills | Nov 06, 2009 07:18am | #7

   I don't want to bring it down, I just think they should test it to ensure it is safe.

1. 
   Dinosaur | Nov 06, 2009 05:09pm | #8

   Sorry, poor phrasing on my part. I only meant to indicate that rapid, repetetive cyclic loading puts a lot more stress on a structure than anything else of the same magnitude.

   There is no practical way to load test such a structure that I can think of. Obviously, any load test would have to be NDT...but how close to the calculated breaking strength would the engineers be willing to go to test it? Considering the only way to get that much load onto the structure involves thousands of vehicles and drivers...or a division of grunts jumping up and down in unison.

   Dinosaur

   How now, Mighty Sauron, that thou art not broughtlow by this? For thine evil pales before that whichfoolish men call Justice....

5. 
   jrnbj | Nov 06, 2009 09:08pm | #10

   Nice link. Thanks!!