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This is a major artery into L.A. At first they were talking 3 to 5 weeks. They did it in less than 10 days.
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No way is something like that going to happen here...
Depending on the design of the replacement...i.e. steel truss, precast concrete, cable stayed, simply procuring and fabricating the the various elements takes time.. Evn though this project will definately be "accelerated"
Steel mills don't have stock of millions of pounds of various shapes "in-stock", with a project like this pressure will be put on the mills to "cut the line" and roll the required shapes for this bridge ahead of current orders..
Ordering bulk steels shapes usually takes months.. and certain shapes are not even rolled in the States..
Many of the jobs I've worked on have a Buy American Clause in the specs.. One job in particular the contactors detailer specified a shape that was not rolled in the States... an exception was made because of time constraints and redesign costs.. The shapes were sourced from a mill in Germany
Just some pics from the Manual of Steel Construction.. I have the Silver more recent addition somewhere..
The designer has to strike a balance of the lightest member, the most economical construction method, availability, domesticity.
Mill don't have stock of all the various weights of shapes.. Contractor need to order the shapes, then wait in line for the mills to produce the members required.. The the raw product is shipped to a fabricator to cut and drill the pieces.. mills sometimes only cut certain lengths.. So if you need a 46' member, and the mill only supplies 50 footers... you get 4' of waste on every piece...
What goes on behind the scenes to build infrastructure is really remarkable...
Some shots from the Steel Manual
Founds this calc in the Manual... have no Idea what I was designing..
