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(USA Today)   Bad: Forgetting where you left your car in a multi-level parking garage. Worse: This   (usatoday.com) divider line 4
    More: Florida, parking garage  
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23303 clicks; posted to Main » on 10 Oct 2012 at 7:53 PM (1 year ago)   |  Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



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2012-10-10 10:20:53 PM
2 votes:

crab66: CraicBaby: Ugh. I have this fear that the parking garage will collapse while I'm in it. This does not help.

They freak me out a little too. I know there are literally thousands of the things that are perfectly safe but you still hear about a collapse every so often.

What is it? Shoddy construction? Design? You would think a giant reinforced concrete structure would be pretty solid.


My father and I work construction (restoration actually, this collapse happened a couple blocks from a job we're working on now), we can't know how this one collapsed until the investigation is finished but what he explained to me about other similar parking garage collapses was that the crane is rented by the hour. The beams and columns are precast and put in place first, then the deck is made up of double TT precast sections and is lowered on top of the beams by the crane, he said there should be 20 weld points for the exposed rebar between each deck piece and the beams they are resting on. Since the crane is working faster than the welder, the welder ends up tac welding a few spots on each and will go back later to finish the job. Generally, the structure is solid and won't collapse by itself since the deck sections are resting solid on the beams. However, if the crane brake slips a bit or it comes down hard with one of the deck sections, it could jostle the structure and without all of the welds in place, the entire thing comes down (which is probably why only 1/4 of the garage collapsed, the other 3/4 were in place and the welding was finished properly there). The design is fine, pretty much all parking garages are built off of a standard proven design and all of the individual pieces are pre-cast at a concrete plant and trucked to the site. It's only in rushing the assembly that this can happen while they are putting the deck sections in place.
2012-10-10 10:37:19 PM
1 votes:
Floor after floor collapse? Obviously it was thermite planted by the government. Inside job!
2012-10-10 08:36:14 PM
1 votes:
Sometimes this sort of thing is what happens when we strip away all the "red tape and regulations" interfering with business.
2012-10-10 07:27:47 PM
1 votes:
FTFA:
Many workers left the site without telling authorities.
...
William P. Byrne, president and chief executive officer of the garage contractor, Ajax Building Corp., said an internal review was being launched to determine the cause. Byrne said the company would embrace "any additional protocols, policies and procedures that will enhance and ensure the continued priority of safety."


Found your problem. Fleeing workers after a disaster probably means they are illegal immigrants. Teach you to cut corners, Ajax.
 
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