Two possibilities come to mind right away, but I don't know if either is the largest: the shuttle landing strip at Kennedy Space Center, the 747 Boeing facility near Everett, Washington.
You might try one of those 'search engine' thingies.
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Whiskey, women -- and astrophysics. Because sometimes a problem can't be solved with just whiskey and women.
Well, I tried one of those search engine thingies suggested by Usbport and found this:
The largest monolithic dome in the world is the home of Faith Chapel Christian Center in Birmingham, AL, USA. It seizes the record at 72 feet (22 m) tall, and 280 feet (85 m) in diameter. Inside is a floor area of 74,500 square feet (6,920 m2) in two levels.
This tidbit compliments of Wikipedia.
There are many other 'largest' structures. Wonderful thingie, this internet. A hint: I did not use "Reinforced Cencrete Base Slab" as my search string.
Reinforced Cencrete Base Slab
Re: reinforced concrete base slab
